Why Is Salt So Bad for You, Anyway?
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- Опубликовано: 26 авг 2024
- You've probably been told that eating too much salt is bad for you, especially if you have high blood pressure. But what exactly does salt do to our bodies that can make it so hard on our hearts?
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Since many of you have questions about this episode, here's some additional information, beyond what we included in the video.
Most people have probably heard that too much salt is bad, but they might not necessarily know why. That's all we really set out to explain in this episode: what researchers think salt does to the body, and why high blood pressure is unhealthy.
We didn't get into the controversies over the exact relationship between lowering salt intake and cardiovascular disease, because that relationship isn't totally settled yet, and there are many studies whose results seem to contradict each other.
One source of controversy in the research on salt and blood pressure is whether too little sodium is bad for you -- and how little is too little. But that's not what this episode was about, so I'm not going to get into it here.
Another major source of controversy is whether lowering salt intake actually lowers blood pressure and saves lives.
The Cochrane Collaboration, which does comprehensive, authoritative reviews of healthcare-related research, has done many systematic reviews of studies related to salt and blood pressure. In 2011, they published a review that didn't find strong evidence that lowering sodium intake affected whether people died from cardiovascular disease. (academic.oup.com/ajh/article/24/8/843/226001/Reduced-Dietary-Salt-for-the-Prevention-of)
That led to a slew of articles saying that people don't actually need to decrease their salt intake, including the Scientific American article mentioned in one of the comments below.
It's worth noting, though, that the 2011 Cochrane review stated that "Our findings are consistent with the belief that salt reduction is beneficial in normotensive and hypertensive people." It went on to say that the methods used to reduce salt in the trials included in the review, and in other systematic reviews, didn't do enough. Their recommendation was that researchers find better ways to reduce salt intake, because clearly dietary advice isn't enough.
In 2014, Cochrane did another systematic review as an update to that 2011 review. (onlinelibrary.wiley.com/doi/10.1002/14651858.CD009217.pub3/full)
This time, they found weak evidence (meaning, some evidence, but not strong evidence) that reducing salt intake had some cardiovascular benefit. That led to another set of articles saying that people don't actually need to reduce their salt intake.
But the updated review's recommendations were the same as the earlier review's: we need to find better ways to help people reduce the salt in their diets.
Essentially, the problem is that just telling people to reduce the salt in their diets isn't enough. There's too much salt hidden in processed foods for people to be able to reduce their salt intake effectively just based on dietary advice.
It's telling that the study in the 2014 Cochrane review that showed the strongest effect of lowered salt intake on cardiovascular health was the one where the subjects had no control over the amount of salt in their diets. The study was done in a nursing home where kitchen staff prepared all the food.
It's hard enough for researchers to isolate the relationship between salt and cardiovascular disease because there are so many confounding factors. The fact that it's so hard for people to actually reduce their salt intake makes teasing out the relationship even more complicated. That's how we've ended up with a lot of inconclusive evidence.
None of this is saying that too much salt isn't a problem, or that high blood pressure isn't dangerous. It's saying, we still need to figure out how to help people lower their salt intake effectively, and then we need to figure out how much that will protect them against cardiovascular disease.
All we're saying in this episode is that salt can raise blood pressure, and that high blood pressure leads to all sorts of other health problems. That's the thinking behind the recommendations to limit salt intake.
So, that's the deal with the debates you might be seeing in the comments here.
Sodium doesn't cause plaques, it seems. So the premise is flawed.
A more recent pooled analysis (not without its flaws and shortcomings, see below), concluding that "[l]ower sodium intake (excretion,
Can you talk about plasma in the human body?
SciShow Hi! Just an idea, but maybe you could just make a video with all of this information in it rather than explaining it in the comments section. Huge fan of the show, and please keep up the great content
SciShow by 2300mg you mean the sodium an not the salt, right? Because 2300mg * 2,54 equals roughly 6gr of salt, which is the official gda.
ironically not enough sodium ALSO causes kidney failure
Obsidian Scale no , it doesn't cause kidney failure . Acidic protein and phosphorous does .
Too much salt is just an extra work for the kidneys but it doesn't cause kidney failure . I think you'd first die because of sodium and potassium imbalance if you'd consume a lot of sodium in a small amount of time .. or you'd first die because of dehydration
That's looks like the related fake science sponsored by the Big Food Industry to promote the use of salt as food additive.
It's well known that the saltier your diet be, the more the calories and amount of food you will eat:
• Kong YW _et al._ *"Sodium and Its Role in Cardiovascular Disease - The Debate Continues."* _Front Endocrinol (Lausanne) (2016 Dec 23) vol. 7 art. 164_
journal.frontiersin. org/article/10.3389/fendo.2016.00164/full
www. ncbi.nlm.nih. gov/pmc/articles/PMC5179550
www. ncbi.nlm.nih. gov/pubmed/28066329
www. ncbi.nlm.nih. gov/labs/articles/28066329
• Brown MJ. *"Renin: friend or foe?"* _Heart (2007 Sep) vol. 93 (9) pp. 1026-1033_
www. ncbi.nlm.nih. gov/pmc/articles/PMC1955008
www. ncbi.nlm.nih. gov/pubmed/17488768
• Rakova N _et al._ *"Increased salt consumption induces body water conservation and decreases fluid intake."_*_ _J Clin Invest (2017 May 1) vol. 127 (5) pp. 1932-1943_
www. jci. org/articles/view/88530
www. ncbi.nlm.nih. gov/pubmed/28414302
• Kitada K _et al._ *"High salt intake reprioritizes osmolyte and energy metabolism for body fluid conservation."* _J Clin Invest (2017 May 1) vol. 127 (5) pp. 1944-1959_
www. jci. org/articles/view/88532
www. ncbi.nlm.nih. gov/pubmed/28414295
• Gina Kolata. *"Why Everything We Know About Salt May Be Wrong."* _The New York Times (May 8, 2017)_
www. nytimes. com/2017/05/08/health/salt-health-effects.html
Why do you want to block renin, aldosterone and adrenalin? Didn't you mention when talking about fasting that the consequent rise in your adrenaline levels was good for you?
Incidentally, how much sodium did the cavemen take? Were all dying of cardiovascular events because of their higher levels of renin, aldosterone and adrenalin?
FYI, a low-sodium diet does have "beneficial" effects other than lowering blood pressure. For instance, it facilitates acclimation to physical activity in hot environments, contributing to increase your sweat rate, it prevents exercise-associated hyponatremia by minimising the sodium and other electrolytes lost in your sweat, a low-sodium diet also reduces your calciuria, thus contributing to keep the calcium of your body (and hopefully, your bone mineral density). Granted, too much circulating calcium may also contribute to CVD if you suffer from atherosclerosis, but likewise, a low bone mineral density or osteoporosis may well be fatal:
• Cappuccio FP _et al._ *"Unravelling the links between calcium excretion, salt intake, hypertension, kidney stones and bone metabolism."* _J Nephrol (2000) vol. 13 (3) pp. 169-77_
www2. warwick. ac. uk/fac/med/staff/cappuccio/publications/jnephrol_00hypoth.pdf
www. ncbi.nlm.nih. gov/pubmed/10928292
• Frassetto L _et al._ *"Diet, evolution and aging--the pathophysiologic effects of the post-agricultural inversion of the potassium-to-sodium and base-to-chloride ratios in the human diet."* _Eur J Nutr (2001) vol. 40 (5) pp. 200-13_
www.ionizers. org/pdf/3-scientific-articles/Diet_Evolution_and_Aging.pdf
www. ncbi.nlm.nih. gov/pubmed/11842945
• Chinevere TD _et al._ *"Effect of heat acclimation on sweat minerals."* _Med Sci Sports Exerc (2008) vol. 40 (5) pp. 886-91_
www. dtic. mil/dtic/tr/fulltext/u2/a480325.pdf
www. researchgate. net/publication/5443315
www. ncbi.nlm.nih. gov/pubmed/18408609
• Nielsen B _et al._ *"Human circulatory and thermoregulatory adaptations with heat acclimation and exercise in a hot, dry environment."* _J Physiol (Lond) (1993) vol. 460 pp. 467-85_
onlinelibrary.wiley. com/doi/10.1113/jphysiol.1993.sp019482/abstract
www. ncbi.nlm.nih. gov/pmc/articles/PMC1175224
www. ncbi.nlm.nih. gov/pubmed/8487204
• Takamata A _et al._ *"Relationship of osmotic inhibition in thermoregulatory responses and sweat sodium concentration in humans."* _Am J Physiol Regul Integr Comp Physiol (2001) vol. 280 (3) pp. R623-9_
ajpregu.physiology. org/content/280/3/R623.long
www. ncbi.nlm.nih. gov/pubmed/11171638
• Shibasaki M and Crandall CG. *"Mechanisms and controllers of eccrine sweating in humans."* _Front Biosci (Schol Ed) (2010) vol. 2 pp. 685-96_
www. researchgate. net/publication/40785731
www. ncbi.nlm.nih. gov/pmc/articles/PMC2866164
www. ncbi.nlm.nih. gov/pubmed/20036977
• Armstrong LE _et al._ *"Responses to moderate and low sodium diets during exercise-heat acclimation."* _Int J Sport Nutr (1993) vol. 3 (2) pp. 207-21_
dtic. mil/dtic/tr/fulltext/u2/a273292.pdf
www.dtic. mil/dtic/tr/fulltext/u2/a480325.pdf
www. ncbi.nlm.nih. gov/pubmed/8508197
• Magalhães FC _et al._ *"Thermoregulatory efficiency is increased after heat acclimation in tropical natives."* _J Physiol Anthropol (2010) vol. 29 (1) pp. 1-12_
www. jstage.jst.go. jp/article/jpa2/29/1/29_1_1/_article
www. ncbi.nlm.nih. gov/pubmed/20453428
ITS NATRIUM!! learn it!!!!
Kymate we'll call it whatever we want!
+Kymate When talking about it as an element, we say Natrium.When talking about it as a material, its sodium.
League of Legends players must be dying left and right
hahaha :'D
Found the LoL player
This is an incorrect association to make.
only competitive players (around 1%) 99% rather play for fun than for the win
thats totally wrong, id say around 60-70% play for fun, the rest play to win why do you think so many people are toxic as balls? they want to win
might be a bit higer or lower as to how many play for fun but its pretty close
is sodium good for you? Na...
Joe Brown bravo
Joe Brown i bet you got laid alot
Joe Brown you must be fun at parties xD
Dammit wanted to make that joke 😂😂😂
you could say, he is a fun ghi
Salt is Good for people of all ages. Salt is NOT bad for you. Eat salt to taste...
I was wondering if you'd show up here
Too much of anything is bad, what a shocker.
That wasn't the point, but okay.
Hai Hai That's exactly the point
3Runner95SRB The point is *WHY* too much is bad for you
+The Truth no
Except of course natural stuff. Because anything natural ca only be good for you, no matter how much you take.
umm... I've been reading through your sources, and they all conclude there is insufficient evidence to say whether salt actually causes hypertension, or even if reducing salt intake relieves it. Given the large amount of research in this area, and the lack of consistent results, I think it's fair to conclude the culprit lies elsewhere. Especially when hypertension and sugar intake share a much stronger correlation.
Yeah I just read *The Salt Fix* by Dr. James Dinicolantonio. Apparent all the knowledge we got about salt is comes from an outdated, disproven theories about salt. And much to my surprise salt actually helps prevent obese, diabetes, and high blood pressure. I was like what the hell, it's a complete 180° from what I have been told.
Someone aware of the truth, virtually all nutrition studies can't conclude anything from the data and are just opinions!!
@@gabrielbarrantes6946That's a faulty conclusion, mate.
This video made me...
More knowledgable.
Jim Gorlett kill...
my thirst for knowledge.
I was expecting salty
That comment made me
Happy
All this salt talk is making me feel...
tired
Fun fact: A higher level of salt in your diet, or taking salt tablets, is used as part of treatment for Vasovagal Syndrome and similar illnesses. Weird how something we're generally told to avoid is a necessary part of treatment for some of us! :)
Yep. I have extremely low blood pressure. US doctors were never concerned despite it causing me problems. When I dove into research I discovered that prescribing salt pills was the treatment in Europe. Back then I did not like or use salt at all. Just by increasing my water intake and using sea salt it helped tremendously. Eventually I began adding electrolytes to all of the filtered water that I drink. Major difference for my dysautonmia.
Exactly! I just read *The Salt Fix* by Dr. James. Apparent all the knowledge we got about salt is comes from an outdated, disproven theories from like decades ago. And much to my surprise salt actually helps prevent obese, diabetes, and high blood pressure. I was like what the hell, it's a complete 180° from what I have been told.
context matters
high sodium + high carbohydrates will likely cause more harm than good since you are more than tripling your fluid retention
hey sci show, you're information is not quite the whole story. recent studies punished by NIH and American journal of clinical nutrition are saying it's less about the raw value of sodium that's causing hypertensive episodes and more the imbalance of sodium and potassium in the diet. BP is largely regulated the rennin angiotensin aldosterone system and this hormone pathway excellent at dealing with sodium potassium and water balance, particularly potassium in the plasma/urine. We're finding that it's more the ratio of Na and K in the diet leading to much more sodium from the processed foods and much less potassium acting as the counter ion the glomerular filtration in the kiddy's to help with the Na excretion (Rather than the net Na alone) that's causing elevations in regulation of BP. check out the intersalt study in the journal of American and clinical nutrition (1997). that's the first study to really and directly show that its the Na and K ratio, not just that high Na is causative of hypertension. long story short, it's a bit more complicated than you let on.
drivic i said it's the first article and I meant what I said. calm down a bit mate lol
The problem with potassium is that most of the human population in the world take too little (particularly those with westernised diets) since cereals are poor potassium sources, and cereals are the primary staple in most agrarian populations. A similar phenomenon occurs with calcium since cereals and meat are poor calcium sources.
Zephyr López Cervilla you're exactly right. people do not get enough potassium to properly regulate their plasma tonicity and the issue is certainly exacerbated by the high levels of sodium in Western diets
yessss!!! Thanks you
Exactly, people used to eat vastly more salt than they do today because salt was used as a preservative, but we didn't see the same level of problems with high blood pressure and heart disease. It's far more plausible that today people don't consume enough potassium from fruits and vegetables so everything is out of balance. In any case, as you say the 'salt is bad' narrative is a major oversimplification.
Normal people do not get high blood pressure from high salt intake. This only affects people who already have high blood pressure and people with hypertension. Healthcare Triage has multiple videos on this topic. I would recommend those.
I expected better from Scishow.
High blood pressure == hypertension. Otherwise I agree with you.
So are you suggesting that sodium will not cause hypertension, only makes it worse?
Kelly
That seems to be the case. People who are normotensive (BP below 130-140) tend to have a lot of reserve capacity in dealing with salt. It's only a problem if your internal blood pressure regulation is already out of homeostasis. This means your problems dealing with sodium are secondary to the main problem, which can be for example atherosclerosis or kidney disease.
Ethan Radford I eat salt like there's no tomorrow and have low blood pressure
I was thinking the same thing. I have always consumed a great deal of salt and my BP has always been normal. Sometimes even slightly lower than normal.
Both my parents had HBP a couple years before my age though, so I've chilled out with the salt intake. Not taking my chances ... Plus, bloat. xD
Can we also specify that if you don't have high blood pressure it's not a problem? Also that someone being over weight doesn't mean their blood pressure is high. And also that table salt in one of our main dietary intakes of iodine which is very essential for normal thyroid function...
Due to these attitudes, people get told to avoid salt because they are "over weight", which can actually deprive them of iodine and slow down their metabolism, often sabotaging any attempt to lose weight. [Though in some cases higher thyroid function can end up leading to weight gain too]
Moral of the story. Let your doctor voice concerns about your body, not other people, and certainly not popular opinion. Also make sure you know what your blood pressure is normally like, and have your thyroid checked periodically so you know what your levels are like.
The takeaway from this video is that moderation is good. Don't eat too much salt, don't eat too little. In other news, man lands on moon!
60 Second Success
Inb4 you trigger the tin foilers with that last statement
spindash64 even hardcore conspiracy theorists believe we landed on the moon. Its the flat earthers that believe we didn't land cause they don't believe the pictures of a round earth are real.
You'd be amazed at how many people believe that things can be divided into good and bad with one having no downsides and the other having no upsides.
Also the moon isn't real, it was destroyed during the second world war and replaced by a hologram.
Actually, if you're cardiovasularly healthy, you should be eating 4-6 grams per day, and anywhere between 2.5 and 7 is perfectly fine. It would be hard, even with today's food, to try to each too much salt if you're cardiovascular healthy.
Fun fact: If the Earth were flat, cats would have pushed everything off of it by now.
Jokes on all y'all my blood pressures so low I faint if I run to much and my hands 'n' feet fall asleep in cold whether, so I can eat all the salt I want. I'd say it's a decent trade off.
will south are you sure you don't have something else wrong with you? Have you gotten blood work, esp for thyroid levels?
I've always had low blood pressure and I'm pretty tall. I get dizzy when I stand up from sitting on the floor, things fall asleep if I sit uncomfortably and sometimes even from no particular reason. I have never fainted though, and especially not from running. That does not sound like it's caused by low blood pressure, that sounds like a heart condition :(
I'm sure you've seen a doctor but perhaps you should get a second opinion.
Fainting often because of low blood pressure is not very usual. You might wanna check that, and mention POTS (lot of phycisians don't know or care about it, which is why you usually just get the "its just low blood pressure" talk). POTS can be easily diagnosed by a tilt table test, there's even an app to test it at home. I have POTS (orthostatic intolerance) and I have been advised to eat 10-25 mg salt a day and drink over 2 liters of water. Also, even if it's just low blood pressure, heavyweight compression socks will be very helpful for running. The blood pumps faster to your head that way, so less fainting.
98Zai
It's a combination of Reynaud Syndrome, migraines and in general low blood pressure (I inherited a great selection of genes). So if I do too much exercise my low blood pressure causes migraines which causes me to black out eventually, plus my hands falling asleep is doubly bad due to Reynauds. Apart from constant nosebleeds it's acceptable, I've been to the doctors and they've said nothing's wrong with my heart but it's because like you I'm tall on top of all things so after a while my body should catch up and it shouldn't be as bad.
MoniqueEressea
Thanks! I might try the socks if doesn't affect my Reynauds, I was told it was the blood going to my head that caused my nosebleeds, sight and migraine issues.
High blood pressure is no joke. I didn't realize I had high blood pressure until I suddenly started to lose vision in my right eye. I never even knew I was at risk.
'More than 2300 milligrams a day'.
I humbly request that people stop doing this! Just say 2.3 grams. It unnecessarily makes the figure seem inflated, and can affect how people perceive the statistic. That being said, love the video and the channel, but I see this a lot (not just here) so thought I should mention it! Much love.
Luke Gardener I suppose it's because the reasonable unit for salt in nutrition is normally mg. When describing a food's content, you say 10 mg or less. Only when accumulating through the day, it becomes overwhelming. And because of that nutritionists get used to that and report their information like that.
I've found that problem a lot, professionals become so used to a slang that is useful for them, that they do not realize it's not so useful for divulgation and the general public.
That's not a statistic.
To be fair, labels on food are quoted in milligrams, not grams. Yes, the conversion is quite simple, but I feel it's better to keep everything nice and consistent.
I always figured it was a handy reference to equate the number of calories to the mg of sodium, since the "official" recommendations of 2000 calories and 2300mg sodium are close to each other. The idea being, that you ideally want to consume food with roughly equal mgs of sodium as there are calories.
In europe this number is twice as high 4.6 grams.
For those concerned about consuming large amounts of salt, I would highly advise looking into your sugar (or more so, carbohydrate consumption) consumption habits before fearing your salt consuming habits. Sugar has heavily correlations with a multitude of different cardiovascular and metabolic issues.
1Pyroon yeah sugary&oily foods are way more of a danger than salt.
and than there's oil, refined grains, meat, eggs and dairy. You should avoid all of those. Don't stop with refined sugar and salt.
The benefits are enormous
I'm sure anyone can agree that too much or too little of anything can kill you.
how about we try not to eat and starve to death then we would not have any health issue at all. (plz dont try this at all)
_"I'm sure anyone can agree that too much or too little of anything can kill you."_
Too little mercury won't kill you.
there is actually no concrete proof of salt raising bloodpressure, neither is there that its harmless, but its worth noting
They messed up again just like that infamous GMO video, most of the information in this video is based on "alternative facts" :(
he just told you in plain english there is none
Spider I like cobblestone proof,myself.
just say "i dont get it" the science is right there screaming in your face and you just deny instead of reading further or asking an expert to explain it to you...im sorry but i have zero respect for people that say "theres no concrete proof" that always means i dont get it
+
Watching this as I eat diced tomatoes with a ton of salt in it
😐
tomatoes and salt are SO good mmm
+Commander Waddles
I have to try this.
Huh... Actually not bad. Really brings out the savory flavor.
M. Utley yeah salt intensifies flavours and tomatoes have a natural umami taste
Salt isn't the enemy. Sugar is.
@@mechanicalmiracle6
No, only salt is necessary. Sugar isn't. The body can create what it needs. There is no essential carbohydrate.
@@mechanicalmiracle6
The brain needs no sugar from diet. It needs glucose, but the body can make that. There is no essemtial carbohydrate.
So much misinformation in such a shot video!
That moment when a SciShow video slightly contradicts a Healthcare Triage video...
Slightly? lol This video is complete bunk. All they've done as far as I can tell is quote the american healthcare standards sodium intake recommendation almost word for word, even though the idea of salt raising blood pressure was literally made up in the 80's with zero evidence and has been around since.
See this study review by Md Dr. Michael Greger.
You will learn that there is plenty of quality data against and simply lousy data to defend the salt industry... Mac D would be flavourless if they stuck to the healthy sodium levels.
Anyways: The evidence that salt raises blood presure - nutritionfacts
Thanks for the explanations! However, I have some questions about this: Are there any negative aspects to eating too much salt, other than raising your blood pressure? In case you suffer from too low blood pressure, is it actually healthy to eat a little more than the recommended 2.3 grams of salt per day to slightly raise your blood pressure?
Wow, I'm extremely disappointed in you, SciShow crew. It's well-known that the sodium intake recommendation is not only pointless for people who don't have HBP, but that it's led to people giving their kids such little sodium that they die. The bunk science behind the sodium limit has been under scrutiny for years now, and several meta-analyses have found no correlation between salt intake and HBP.
Also, increased sodium instantly kicks on all kinds of regulatory mechanisms which actually *increase*, not decrease the kidneys' ability to excrete it along with water. Anyone with normal renin-angiotensin-aldosterone system will compensate for it in a matter of tens of minutes.
Though I have been taught in school that there are several ethnicities in which the genetic polymorphisms of mineralocorticoid receptor, ENaC or Na/K/2Cl symporter predispose them for higher sodium sensitivity (Africans in particular I think). Anyone know more about that?
Samuel Hricko African is not an ethnicity
My grandmother died from too little salt intake after seeing a video like this an becoming convinced salt would kill her.
Yeah she wasn't perfectly stable and a normal person may not have taken it to such an extreme but a reminder to eat some salt wouldn't have hurt...
my father is having the same problem with phosphate and protein
Salt is pre-added to so many foods we buy these days. Unless if those kids are doing a vegan raw food diet, I highly doubt they are lacking in sodium by any means. I've lived fine without having a box of salt in my pantry for years.
you need salt and calcium for your nerves to work, a salt free diet for a long time can make your nerves not work properly like having scintillating scotoma and temporary blindness, you need to eat salt for your nerves to work properly, rda of 2.3g a day or whatever, i had to ADD salt, not remove it
No one is suggesting a salt free diet. So why are you mentioning it?????? I doubt very much that you had to add salt, man has been living millions of years without the need to add salt.
So what does SciShow think about the "Today I found Out" video about the studies done on salt?...and how the findings were essentially none, to faulty at best?
I was just about to say that myself when I saw your comment, the quality of this channel has really gone down as of recent.
i think the whole "low sodium trend" is a bad case of correlation doesnt equal causation. high sodium foods are generally very high in fat and cholesterol (fried foods, fries, chips, processed foods, bacon, etc.) so people who consume large amounts of salt generally also eat alot of unhealthy foods, raising their risk for heart disease, but that doesnt necessarily mean it's the salt causing that. The recommended amount of salt is also kind of low considering countries like Korea have very healthy people who also eat way more salt then that, foods like kimchi and sauerkraut have roughly a third to a half of your salt limit in a single serving.
The WHO's recomendatio. is absurdly low, even dangerously low. It's been found to be more dangerous to eat less than 2300 mg of sodium per day than to eat more than 7,000 mg per day.
Yes it does raise blood pressure but this is a very temporary state.
Pretty sure it doesn't raise blood pressure at all, even temporarily. Such claims are fabricated in their entirety IIRC. Your body just uses more energy and conserves water to eliminate the excess, like with everything. If excess salt supposedly raises blood pressure, why doesn't sugar? Or iron? Or potassium? Or zinc? Or copper? Or any other solute in the blood?
Oh, really? I was under the impression it does raise it a bit, but this doesn't last long and isn't unhealthy for people who have healthy kidneys / normal blood pressure.
Do you have any sources for the claim it doesn't raise it at all? I am very interested in that. It'd be so far from the mainstream view, I really have to know.
7000mg... Sounds like a major heart attack waiting to happen
@@rodneykuhn7025
7000mg is fine and not bad for your heart. Watch your sugar/carb intake instead. That is what is bad for the heart, not salt.
I need sodium or else I pass out when I stand up.
Bright side: I have an excuse to eat salty pretzels.
Ridiculous title. It's as if you said, "why is water bad for you, anyway?" instead of "why is too much water bad for you?". Seems silly, huh? Same thing with salt.
The video is about how salt could be bad for you. They did not say it was about overall health effects
A video about "why water is bad for you" would talk about an imbalance of sodium if you had too much
Yea the title was crafted to get the attention of people who either think like that, or are aware of that being commonly held opinion, whether they are for, or against it. I knew better and it got me watching it anyway. It worked 👌
Bose-Einstein how often do people have poor health due to too much water?
The title makes perfect sense to me. As someone with a family history of high blood pressure I hear all the time that salt is bad for you and that I need to avoid it. So the title deals with the belief that salt is bad for you and should to avoided as much as possible. Whether thats actually the case or not is another matter entirely.
It's also not universal. Your blood pressure being influenced by salt intake is a genetic thing. The body manages the level of sodium in your blood EXTREMELY tightly for most people.
OK, High blood pressure is bad. Check. Salt causes high blood pressure - DEMONSTRABLY FALSE. Ergo, "salt is bad" is not a reasonable conclusion. Yes, some people have sodium induced hypertension, and yes, they should maintain a balance in their salt intake. However, the vast majority of us do not have sodium induced hypertension, and our bodies are actually pretty good at getting rid of excess sodium. That's why we don't all have hypertension even though almost everyone eats more salt than "recommended" by people with absolutely no medical evidence to support their recommendation. Do some research, heck, call Healthcare Triage.
Hypertension is a regularly under-diagnosed condition because the symptoms are not readily apparent or non-existent, that's why it's called "the silent killer." So, perhaps there would be a far greater number of those considered afflicted had this country practiced "prosperity for all" via universal health care.
I love how Olivia is always bouncing around, like she's really excited to teach us stuff!
Wish I had just a single teacher in school as excited to teach as her.. funny what interacting with teenagers does to people.
surely the roughly 30g sugar is going to have a much greater osmotic effect than the 3.2g of salt
I feel really bad because when you mentioned bone loss, the first thing that I thought of was waking up one morning and going "Has anyone seen my femur?! I can't find it!"
So if I don't have high blood pressure, why is salt so bad?
So what you are saying is? SciShow is bad?
Welp, the info in this video is entirely devoid of factual information. The idea that salt raising blood pressure was literally fabricated by some wingnuts in the American healthcare industry who thought it sounded possibly correct and the idea has persisted since, even though theres zero evidence whatsoever for such a conclusion and there never has been. Excessive salt intake doesn't raise your blood pressure, it raises production of urea, and makes your body recycle more of its water in the kidneys to purge the extra mineral content. Incidentally, this uses a significant amount of energy, so you theoretically will get a little more hungry more often if you eat a lot of salty foods.
what is scientific references: XLZOiG4etXo this?
Proof? Sounds to me like you have some alternative facts you're leaning on.
Why is it my HBP went down after lowering my salt intake?
amakeleven On hot days, street vendors sell more ice cream. Also, on hot days, murder rates go up. Therefore, ice cream causes murders. That's the kind of logic you're using here. Correlation and causation are different things and you're conflating them.
Soooo If I normally have low blood pressure, I can forget about controlling my salt intake?
*In other words, everything in moderation, including moderation.*
so only for Americans, not for normal people
now that's funny roflmao
Actually salt over consumption is a huger problem in basically any country where you buy pre-packaged food. You have the internet, so i am assuming you don't have to kill birds with a stick to feed your family, so you probably have to much salt in your diet too. >___>
This is the only time I've seen one of these things be WRONG o.o
There's actually no scientific consensus on the link between sodium and blood pressure. The mechanism mentioned in this video is what got the American Heart Association and such to suggest reducing sodium intakes. However, while this mechanism makes theoretical sense, it's never been shown to ACTUALLY happen in humans.
There's quite a lot of debate, but thus far, there has been NO conclusive information that suggests high sodium intake has any relationship to blood pressure.
My doctor says I should eat MORE salt.
Hold still, I'm mailing you a lint roller. *presses pause*
The recommendation for athletes can be upwards of 10'000mg a day, in some cases up to 45'000mg a day. It depends on the person.
Needs to be a better understanding of individual needs rather than a blanket statement. 2300mg of salt is absurdly low, even for gen.pop.
High blood pressure can lead to plaques building up in blood vesels resulting in less space for blood?
High blood pressure can lead to high blood pressure?
*Direct to the point, thanks!* 😄😄
I'm in awe to the fact that this medical "staple knowledge" is only now being explained to me in a way that I understand to be so intuitively. I think I've taken it for granted for so long.
Makes you only wonder how many of these "oh already knew that, but why and how?" are still left for videos to be made about? Exciting times.
Scishow: What are your comments regarding the video about salt done by the Today I Found Out channel? Would you say his sources are not valid? If there is in fact some debate over how exactly salt is bad for you, it would have been nice for it to have been included.
Well, there is no debate. SciShow did zero research on this and are merely parroting the flawed American healthcare standard recommendation. You can look for yourself, but there is and never has been evidence to support the claim that high sodium intake affects the cardiovascular system in any measurable way in healthy people (although people with particular pre-existing blood pressure regulation issues can have their condition exacerbated by an overly excessive trace metal intake, including sodium), aside from the pesky side effect of dropping dead if you happen to eat a whole bowl of salt in one sitting. No studies, no statistical evidence, nothing. The studies that HAVE been done on such claims found the complete and total lack of salt intake correlating with cardiovascular disease or HBP. As far as I can tell, and as TIFO points out, the idea was basically fabricated just cause it sounded right and has persisted since.
Clickbait title? Check. Misinformation presented as facts (no, salt will not give you high blood pressure)? Check.
So...how long before the reality shows start showing up? If we're gonna go the History Channel/Discovery/TLC route, let's at least go the whole nine.
SkylarkVII Remember back when those three channels were actually good, and they had programming that was actually informative? What is this country coming to?
FYI: High salt intake is far less dangerous than *low potassium* or *high sugar*
Please take this video with a grain of salt.
Oh SciShow, you messed up again, just like that GMO video :( Most of the info here is based on pseudoscience and "alternative facts". If you are a SCIence-show stick to the facts and science
She says, "The heart isn't a muscle you want to strain", but then gym instructors say that cardio exercise is good for losing weight, therefor being healthier. I don't understand.
Just don't replace your cardio exercise with salt-heavy diet and you are fine :P
Sindar From That doesn't sound like any fun
Well you really wouldnt want to do cardio 24/7 when you think about it :D
There's a difference similar to doing pushup vs attaching a twenty pound weight to both arms 24/7. Regular cardio IS good for you, keeping your heart in shape, fighting the buildup of plaques on artery walls and in general keeping your blood moving smoothly. However should your heart be strained it is bearing an extra load 24/7. To a point it can adapt, but unlike most muscles your heart doesn't repair itself well or grow. As such once it reaches its limit the strain will cause it to become overworked and start to build damage. Even ten you'll probably last some time, but over months or years your heart WILL break down.
Gareth Dean Thank you for elaborating, I really appreciate it. Now I actually understand.
I watch SciShow to learn things, and it's always frustrating when I'm left with more questions than answers, not to mention conflicting information that is never addressed
Too much of anything is bad, point of the matter is this title isn't clickbait.
It was some years ago that I read consuming the "recommended" daily amount increased heart disease risks because it was too little. The research group said unless you have a history of heart disease or otherwise high risk, just eat what you eat. It takes quite a bit to consume too much, assuming you're otherwise healthy person who also consume healthy amounts of water.
Personal anecdote. I had issues where I was going to the bathroom quite often and my yearly physical never showed anything wrong, I was textbook perfect. I started to add salt to my dinner, and after a week, I was going to the bathroom quite a bit less. After a few months of adding salt to my food, I had my annual checkup and everything was perfect. My blood electrolyte levels did not budge, yet I was finally having some yellow in my urine instead of crystal clear. Not only do I not need to urinate as often, but I am less thirsty and handle heat much better. No longer getting headaches or dizzy when I get too hot, and I seem to sweat better.
Always consult with your doctor. Everyone is different.
Help, I can't think of a pun about Sodium. I must be... So dumb.
Na...I don't think So---dium
Poorly made and researched video.
I was hoping you'd tell me It isn't bad for me at all.
My own fate clings less on salt, than on stress caused by individualistic acceptance.
thanks Amy, how's Sheldon though ?
Salty
Vishwajeet Solanki cabbage 😂😂😂
Andra Mastaufan carrot
Ouroboros how's this salty 😂 she does look like Amy lmao
nice one Raj Koothrappali
i dont know what it is about this chick but she kills the sci show videos for me
MrSurfercano2 she's gotten so much better! I can't quite put my finger on it still. Maybe the way she throws her head from side to side.
Tara Lofley she sounds like shes just reading the teleprompter and she changes pitch alot. i notice myself losing interest and tuning her out. no offense to her im sure shes a wonderful person. just needs to take an acting class to loosen her up
She has stupid glasses and doesn't take care of her hair. Then tosses her head around like she is having a seizure.
Agree. Her first dozen videos were unwatchable. Despite the subject matter, I'd have to switch her off after like 10 seconds. She's borderline tolerable now, but nowhere near as entertaining as the rest of the cast.
maybecat? Sucks you are being forced to watch it
There is a huge tornado near me, calming this show is calming.
"why salt is bad for you?"
Me: *tastes salt*MMHMHMHM SO YUMMY! *Eats all of it*
Is it just me or is the way she ends her sentences realllly annoying?
it IS annoying
no, but you're reallly annoying
JhonFromTS
Immagine her dirty talk ;)
problem solved?
Very annoying in so many ways! The voice, the moving of the arms. Makes me want to unsub
It's not just you. About 10% of the people who watch this have a problem with it and nose rings apparently.
*Olivia hosting and yet no dislike*.
*haters are late*.
Everything -Science / But still made it
She improved
now, please make a video about why you shouldn't exclude salt from your diet and what happens if sodium levels are too low! special thanks, if you have already made one :)
This is old science. There is so much good information on RUclips with facts about why salt is so important for you.
Loved the show until this... now I can't trust you. unsubscribed. At least mention the controversial studies contradicting this claim.
What if salt was great for you the more the better
Sodium is the best
CreeperKillerGaming
*Na* , I disagree
WHAT IF CANDY WAS GOOD FOR YOU #STILL12INSIDE
I'm really confused as to why Healthcare Triage would say one thing (i.e. that staying under 2.3g isn't necessary for most and might not even be healthy) and SciShow would say another thing (i.e. that most people should try to stay under 2.3g).
The title is so misleading it suggest that salt alone is bad. But the whole video states that too much salt is bad. The appropriate title must be "Why (too much) or (exceeding the normal) consumption of salt is bad for you."
Huh, I usually watch RUclips with earphones, and Olivia's voice is unbearable with them on. But, today I didn't have earphones on and now her voice is not unpleasant. Interesting.
Emilio Moreno her diction has improved. Though as a note, she's not the only scishow host with that particular affect.
***** Someone's TRIGGERED. I think it is you who needs a safe space.
Maybe they edit her sound, some youtuber also do that to conceal their identity.
SuperCharlesDC She never really bothered me as much as she did others. Also, she did good with her attempts. The sloppiness went away, as did the facial piercings, and she improved her pacing. The thing about the way she spoke is it was not unique to RUclips. It is how most people talk on it, including one of the male hosts. It sounds different coming from him because his pitch is lower, so he gets a free pass. It bothers me that guys can get away with it, even if their pitch is lower.
***** Aw, this snowflake's still triggered! Didn't Mommy and Daddy give you enough attention when you were a child?
1st
]Achievement unlocked]
Take a shot for every time she says "High Blood Pressure".
I’m in culinary school and I was SHOCKED to hear that only a teaspoon is recommended daily. I use at least 4 TABLEspoons to make a bowl of pasta 😅
When I was young and we had McDonalds (which we did regularly), Dad always got fries without salt, I can't imagine how much salt he saved us from eating.
Don't worry about it. Those recommendations are false.
Splash that salt on my food !!!
I'm gonna die happy : )
Could you make a video on why salt becomes wet when left in open air?
In other news: Eating too many strawberries is bad for you...
Because it disturbs others around you when you go into a fit of rage.
The real question is why our brains are wired to love salt so much
All this talk about heart failure, kidney problems, strokes and dementia is making me hungry.
Like every nutrient, it's not the nutrient itself, it's the amount.
and her face screams to this day, "DADDY NO STOP"
Hears high blood pressure leads to sexual dysfunction. *Throws out salt immediately
Salt? one of the things our body needs to stay alive...
This is not the level of quality that I usually expect from SciShow... In one of the studies you linked to in the description it says "the association of low sodium intake with increased risk of cardiovascular events and death is observed in those with or without hypertension. These data suggest that lowering sodium intake is best targeted at populations with hypertension who consume high sodium diets." But in the video there was no mention of the risks of low sodium intake to those without hi blood pressure.
I feel strongly about this because it's something I've experienced myself, with low blood pressure I found that adding salt to my diet helped me to think and feel better-- electrolytes are essential. No one bothers to tell you this because there's only a one-size-fits-all message where everyone is given the same instructions to lower sodium regardless of it it's actually unhealthy for them. Very frustrating.
Your video on fat was excellent because it challenged the conventional wisdom with more recent research. In this case here's a lot of debate over the issue of salt intake within the scientific community, but this video only presents the same narrow message.
because salt is salty........
My wife's doctor told her she needed to gain weight and suffered from low blood pressure. He basically told he to eat more junk food. Wish I was that lucky.
title should be "why is excessive salt so bad"
As someone who has cystic fibrosis I have never heard someone tell me to eat less salt
I come from such a salty culture so I'm very "can't stop, won't stop" with salt.
Yeah, and they also recommend 10 fries per portion. We don’t have to listen to everything they say.
Yeah... I was under the impression that the 2300 mg-a-day recommendation is on shaky ground in terms of being supported by data. Careful about that production schedule.
Never... eating... salty... AGAIN! !
My Dr. put me on a High salt diet, cause I have super low blood pressure and start randomly fainting without enough
I like that they pointed out that you need sodium to survive.
her shirt makes it look like she owns a cat.
Salt is bad, sugar is bad... and almost anything we eat have them... Hum...
I'm sorry, but when 'sexual dysfunction' was followed by 'bone loss' I couldn't help but giggle
the tag was disapointingly sensationalist
I read that salt isn't bad for you even in large amounts. It just makes you saltier
I can predict the host before the video even starts playing... so much salt around here lmao
Imma eat 2301 milligrams of salt everyday just to piss off my doctor and because I'm savage