Blood flow slowed after eating fat is poor reasoning. It may be true but it could also be lower flow is due to more blood flowing to the stomach to transfer nutrients or to give more oxygen in the red cells to the stomach wall.
As I had my vampire squid refresher, enjoyed a vintage sci-show episode with orange background, transition ditties between segments, and Hank-ocity that continues to this day.
Hey Hank, I just wanted to thank you for going out of your way to create entertaining and educational videos for people. Keep up the good work and DFTBA.
I'm glad that I was listening to this while eating dinner. That last bit especially made me very appreciative of the bowl of lentil soup sitting in front of me.
I wonder if the reason the blood flow in the extremities was reduced after eating a high fat meal was, not because the arteries were clogging, but simply because the blood was diverted towards the digestive system?
I mean, along with exercise science I hesitate to call dietary science, an actual science, the correlation ≠ causation principle seems to get ignored an awful lot.
I have to agree with others here. This blood pressure study is chock full of questionable scientific processes. The primary one for me is that the study group was not fed fat, but instead was fed fats, simple and complex carbohydrates, and proteins. How does a person, supposedly in a scientific study, get from this that it was, in fact, the fats that caused the changes in blood pressure? Could it not have been the proteins? Or the sugars? Or perhaps something else altogether? Too many holes in the study for SciShow to be referencing this.
Blood pressure would lower in the extremities, as more of the flood is now aiding in digestion. When you lift heavy weights you don't want to eat soon after because that would pull the blood you just forced into your muscles, to rush to the digestive tract. " Don't eat a big meal right before you go swimming".
I also have asthma. It's so bad, for the first five years of my life, I was discouraged from laughing, because it could put me in the ER. But my mom didn't smoke, nor does my dad. :c
No they did a before and after study. Eating other foods would make it difficult for the scientists to determine if the effects there were recording were from those breakfast foods and the fatty breakfast foods since a meal can take hours to digest. What might have been effective was to do three treatments: no breakfast, a 'healthy' breakfast, and an 'unhealthy' breakfast among healthy subjects. But sometimes studies are limited by the number of participants and funding to accommodate them
Sometimes I think my family is made up of freakish mutants for whom smoking is healthy, because practically everybody in my family smokes or once did smoke for many years and the heaviest smokers lived into their late 90s, never had heart or lung issues and took far fewer medications than their contemporaries. o_o
Immortal_Beatz It's so weird. I recently tried to stop drinking soda because my doctor told me I needed to limit my sugar intake, but after a few days of drinking water, tea and juice instead, I developed horrible stomach cramps and pain. They went away almost immediately when I got some more pop. :/
Corinn Heathers I guess because your so used to it when your stopped drinking it your body was like I need soda soda so I guess try taking little portions then ease your way out of your soda habit
I got to hear Hoover the talking seal at the New England Aquarium speak, and it was uncanny! When I first heard him, I was visiting the aquarium with a friend. We were unaware that we were in the presence of an animal celebrity until Hoover said something. I remember turning to my friend and saying, “Please tell me you just heard that seal talk!”
technically they still do, the adblocker just rewrites the code so it says you watch it, so technically the ad still gets viewed and Hank will get money for it
You should talk about Koko the talking gorilla. She talks in sigh language and she can actually really understand the meanings. Also, Micheal was another gorilla who could talk (in sign language, of course), but he died. Before he passed, he talked about how he became an orphan when asked to tell the trainer about his mother. The message was very disturbing.
I hear there was a nature article published recently about how redheads' melanin, phoemelanin, is inherently cancer-causing, while the other pigment eumelanin is cancer preventing. Essentially, phoemelanin produces oxidants while eumelanin produces anti-oxidants. So I, and all other redheads, don't even have to be in the sun to get melanona, Yay! I think this is fascinating and would love to see a video on it. Best wishes, Tyler
Thank you for pointing this out! Besides, there many likely causes for the decrease in blood flow that may not be related to the saturated fat, whether it study is genuine that it's saturated fat causing it is only one of many possible interpretations of the data.
To answer 1: I believe that the fact the results were reciprocated across generations signals that smoking while pregnant wasn't the exact cause. It's possible that the nicotine did have an affect on the pregnant rat's child, but the fact it was passed through the generations means it is a unique discovery.
That's what I was thinking as well. It's well documented that blood flow is diverted to the intestinal tract once food is detected in the stomach. This is what causes the drowsy feeling after eating (Postprandial stupor)...
The study on the "breakfast sandwiches" proves exactly one thing: That the tested breakfast sandwiches have the described effects, not that those effects are attributable solely to the fat contents of the sandwich, or to any other single component of the sandwich. If they wanted to do some real science they should feed those people 50 grams of coconut oil or 50 grams of margarine and see what the effects are. They're testing multiple variables at once and that's just bad experimental design.
I'm obviously not a biologist but I'd assume blood flow reduction in the extremities would be due to the body redirecting it to the stomach - it's why you feel sleepy after eating a large meal, because blood moves to your stomach to absorb nutrients faster. This seems more plausible than fats going directly to your extremities. Hank?
The food study needs to control for confounding variables. They should have had three groups: No breakfast, a low-fat breakfast (maybe fruits or oatmeal), and the fatty breakfast. Maybe eating just leads to temporary loss of blood pressure or whatever.
Hey Hank and the Scishow crew could possibly do something Sciencey about England? I don't really know what but I'd love to hear/see something fascinating that not a lot of people know!
I would love an episode on dolphin and whale taxonomy. Most people think that killer whales are a species of whale when they are actually dolphins. I would also be great to inform more people about the difference between dolphins and porpoises.
The control acts as the baseline. Of course it would be useful to compare this to a normal breakfast, but you still need the control to tell you what you are comparing your results to overall.Control group definition (biology online): "A group in a scientific experiment where the factor being tested is not applied so that it may serve as a standard".
Foods that are high in glucose are more dangerous than fatty foods. The noted fact that blood flow decreased in the extremities of the tested subjects by 20% is normal with any large meal for about an hour because more and more blood is recruited to the torso and the stomache area to process the new liquids and foods.
correct me if i'm wrong. after eating food, blood flow get's diverted to the digestive system. after sleeping there wouldn't be any food left in the stomach and small intestine, hence less blood flow there. after eating, blood would flow to those areas. hence less blood flow to the extremities, not caused by fat deposits. not to say that there isn't an affect from LDL's, HDL's, or VHDL's but that seems like a major confounding factor.
I have a thought: did the researchers who performed the fatty foods study use a control group of people who ate a lower calorie meal, to compare the effects between the two groups? I have a suspicion that blood flow tends to centralize in the body after a meal in order to absorb the new nutrients. Our bodys do have ways of purposefully diverting bloodflow.
if the experiment was between having no breakfast and having a large breakfast couldn't it just be the body diverting energy to the stomach to aid digestion? same sort of thing as feeling sleepy after a huge Christmas dinner...
Correct me if I'm wrong, but I would think that the decreased blood flow to the extremities after eating fatty food would not be caused by the build-up of fat in arteries, but rather the blood being sent to the digestive system instead?
Great video but I do have to say, methylation (and acetylation) can occur throughout life and it is caused by either acetyl or methyl groups binding to the histones that serve as a spool for sections of DNA. Also the decrease in blood pressure could be due to something called postprandial somnolence which is when blood is redirected from the extremities (including the head) to the digestive system, this is also the reason you get tired after large meals. The more you know! :)
Pretty good video, the Vampire Squid is an interesting creature :) And one point about smoking, I agree that it is dangerous to a smoker's health, but: It is tenfold more dangerous for a non-smoker to complain about a smoker - smoking. :)
The decrease in blood flow after the meal may be due to post-prandial hyperemia. This is the increased blood flow to the digestive tract after a meal to aid digestion and carry the absorbed nutrients. It might have nothing to do with the fat content.
Haha I was so confused at first when you said Thanksgiving was coming up soon, I was like 'Thanksgiving has already happened.... like a month ago.... Whaa????' Than I remembered, Oh Yeah, America had a different thanksgiving then Canada. I Love SciShow :D
Ok, this smoking bit is exciting to me (partly because I am asthmatic). First of all, it explains why there is so much more asthma nowadays than in olden times. But more importantly, if we can narrow in on the epigenetic factors which cause it, we might be able to cure it. At least in progeny. Yay!!!
I cannot help but think, concerning the fat study, that they are overlooking several factors, the first I thought of being the fact that after consumption, blood is redirected to the digestive system, esp the intestine. Food for thought, if you will.
Or maybe you don't understand. If the experiment was performed as Hank described then it doesn't tell us that the high fat content caused the results shown. It could be that *eating breakfast at all* has those effects. The control should help experimenters to isolate the thing they are testing. It is the "all other things being equal" comparison.
Okay, so here is something I have been really wondering for while now and was curious if you could answer it: How are tattoos able to be permanent? I was thinking about how we are constantly shedding skin cells. I could see them lasting for a while but after a few decades shouldn't all of the skin be new? I don't know a lot of biology or information on human skin cells. So I was just thinking maybe you could explain it. Thanks!
Did you know that you're 20 times more likely to get hit by a meteorite if you smoke? Me either, just made it up. It's against smoking, through, so it must be a fact.
That thing about low blood pressure in the extremities after eating fatty food, that could just be since all the blood is being sent to the GI tract instead? Lipids are hard to digest so this would be expected...
![BLACK BAG - Official Trailer [HD] - Only in Theaters March 14](http://i.ytimg.com/vi/Du0Xp8WX_7I/mqdefault.jpg)
Blood flow slowed after eating fat is poor reasoning. It may be true but it could also be lower flow is due to more blood flowing to the stomach to transfer nutrients or to give more oxygen in the red cells to the stomach wall.
still people think carbs are bad and peleo diet is good
As usual great stuff Hank
about the blood flow thing your body redirects blood to your stomach to aid in digestion therefore taking blood away from extremities.
+
As I had my vampire squid refresher, enjoyed a vintage sci-show episode with orange background, transition ditties between segments, and Hank-ocity that continues to this day.
Lesson learned: Never eat yellow marine snow.
ShadeSlayer1911 But Dr Zoidberg can't resist fatty goodies with a hint of nicotine!
ShadeSlayer1911 or normal marine snow for that matter.
Hey Hank, I just wanted to thank you for going out of your way to create entertaining and educational videos for people. Keep up the good work and DFTBA.
Several hundred years ago, scientists discovered an animal that can imitate human words called a parakeet.
I'm glad that I was listening to this while eating dinner. That last bit especially made me very appreciative of the bowl of lentil soup sitting in front of me.
I wonder if the reason the blood flow in the extremities was reduced after eating a high fat meal was, not because the arteries were clogging, but simply because the blood was diverted towards the digestive system?
Yeah, I've not looked at the study, but Hank's description of it makes it sound shockingly stupid.
Like how Wheaties claim to make your children smarter is based off of a study where the control simply didn't eat.
I mean, along with exercise science I hesitate to call dietary science, an actual science, the correlation ≠ causation principle seems to get ignored an awful lot.
Your show is ridiculously addicting! Thank you for that ^-^
I have to agree with others here. This blood pressure study is chock full of questionable scientific processes. The primary one for me is that the study group was not fed fat, but instead was fed fats, simple and complex carbohydrates, and proteins. How does a person, supposedly in a scientific study, get from this that it was, in fact, the fats that caused the changes in blood pressure? Could it not have been the proteins? Or the sugars? Or perhaps something else altogether? Too many holes in the study for SciShow to be referencing this.
Blood pressure would lower in the extremities, as more of the flood is now aiding in digestion. When you lift heavy weights you don't want to eat soon after because that would pull the blood you just forced into your muscles, to rush to the digestive tract. " Don't eat a big meal right before you go swimming".
Mike C the thing to blame here is the carbohydrates.
Man, science is so cool. I'm not a person who could ever be a scientist, but it's still so fascinating and exciting to me!
@ 3:30 it sounds like the whale is saying "DEY TOOK ER JERBZ!" xD
I did like 4 reports on the vampire squid in school! So cool to see you cover it
Hmm, Live healthy or live happy?
Nah... I'ma go live happy
Man, I love the intro song.... it makes me go back in time 20 years everytime....
My grandma smoked and so did my mom, now me and my brother both have ahsma
I also have asthma. It's so bad, for the first five years of my life, I was discouraged from laughing, because it could put me in the ER. But my mom didn't smoke, nor does my dad. :c
No they did a before and after study. Eating other foods would make it difficult for the scientists to determine if the effects there were recording were from those breakfast foods and the fatty breakfast foods since a meal can take hours to digest. What might have been effective was to do three treatments: no breakfast, a 'healthy' breakfast, and an 'unhealthy' breakfast among healthy subjects. But sometimes studies are limited by the number of participants and funding to accommodate them
Sometimes I think my family is made up of freakish mutants for whom smoking is healthy, because practically everybody in my family smokes or once did smoke for many years and the heaviest smokers lived into their late 90s, never had heart or lung issues and took far fewer medications than their contemporaries. o_o
that must suck
Immortal_Beatz It's so weird. I recently tried to stop drinking soda because my doctor told me I needed to limit my sugar intake, but after a few days of drinking water, tea and juice instead, I developed horrible stomach cramps and pain. They went away almost immediately when I got some more pop. :/
Corinn Heathers I guess because your so used to it when your stopped drinking it your body was like I need soda soda so I guess try taking little portions then ease your way out of your soda habit
Immortal_Beatz Probably true.
Immortal_Beatz its kind of like an drug addiction you need it to feel normal
I got to hear Hoover the talking seal at the New England Aquarium speak, and it was uncanny! When I first heard him, I was visiting the aquarium with a friend. We were unaware that we were in the presence of an animal celebrity until Hoover said something. I remember turning to my friend and saying, “Please tell me you just heard that seal talk!”
Honoka!
The thumbnail of this video, in which Hank appears to have little-girl pigtails.
Best bookshelf ever!
Also, don't try and catch a marine snowflake on your tongue.
I had to keep pausing and replaying the video when hank explained what marine snow is. So weird and funny!!
I don't know why I find Hank saying filaments so entertaining
That talking whale was the funniest thing I've ever heard
Was it just trying to say 'So long, and thanks for all the fish.'
"We didn't know very much about it, except that its hella scary looking" best line ever
technically they still do,
the adblocker just rewrites the code so it says you watch it, so technically the ad still gets viewed and Hank will get money for it
I would be very interested to know how the nicotine was delivered to the rats. Was is carried in smoke?
Yuh
My heart is just clogging up just thinking about that experiment -- and I ate a healthy breakfast, too!
This is my new Fav channel!
You should talk about Koko the talking gorilla. She talks in sigh language and she can actually really understand the meanings. Also, Micheal was another gorilla who could talk (in sign language, of course), but he died. Before he passed, he talked about how he became an orphan when asked to tell the trainer about his mother. The message was very disturbing.
I hear there was a nature article published recently about how redheads' melanin, phoemelanin, is inherently cancer-causing, while the other pigment eumelanin is cancer preventing. Essentially, phoemelanin produces oxidants while eumelanin produces anti-oxidants. So I, and all other redheads, don't even have to be in the sun to get melanona, Yay! I think this is fascinating and would love to see a video on it.
Best wishes, Tyler
Thank you for pointing this out! Besides, there many likely causes for the decrease in blood flow that may not be related to the saturated fat, whether it study is genuine that it's saturated fat causing it is only one of many possible interpretations of the data.
To answer 1: I believe that the fact the results were reciprocated across generations signals that smoking while pregnant wasn't the exact cause. It's possible that the nicotine did have an affect on the pregnant rat's child, but the fact it was passed through the generations means it is a unique discovery.
"NO TIME TO EXPLAIN!" continues to explain everything
good guy hank
Nyes
That's what I was thinking as well. It's well documented that blood flow is diverted to the intestinal tract once food is detected in the stomach. This is what causes the drowsy feeling after eating (Postprandial stupor)...
....I was slightly zoning out and thinking "I should really practice my violin today" when Hank said that. Now I feel inadequate.
The study on the "breakfast sandwiches" proves exactly one thing: That the tested breakfast sandwiches have the described effects, not that those effects are attributable solely to the fat contents of the sandwich, or to any other single component of the sandwich. If they wanted to do some real science they should feed those people 50 grams of coconut oil or 50 grams of margarine and see what the effects are. They're testing multiple variables at once and that's just bad experimental design.
About that breakfast story you forgot to mention how small the study was and the fact they did not have a control group.
no time to explain? runs intro.. and then explains.. Love you Hank :)
Watching these makes me feel productive.
Thanks RUclips for making videos 10 times harder to find and watch.
I'm obviously not a biologist but I'd assume blood flow reduction in the extremities would be due to the body redirecting it to the stomach - it's why you feel sleepy after eating a large meal, because blood moves to your stomach to absorb nutrients faster. This seems more plausible than fats going directly to your extremities. Hank?
You don't need a PhD to be a scientist. You just have to love science and have a thirst for knowledge and experimentation!
The food study needs to control for confounding variables. They should have had three groups: No breakfast, a low-fat breakfast (maybe fruits or oatmeal), and the fatty breakfast. Maybe eating just leads to temporary loss of blood pressure or whatever.
Vampire squid has always been my favourite animal so thanks for doing this! =))
Hey Hank and the Scishow crew could possibly do something Sciencey about England? I don't really know what but I'd love to hear/see something fascinating that not a lot of people know!
I was a lot more excited for that mention than I should have been, lol!
I would love an episode on dolphin and whale taxonomy. Most people think that killer whales are a species of whale when they are actually dolphins. I would also be great to inform more people about the difference between dolphins and porpoises.
The control acts as the baseline. Of course it would be useful to compare this to a normal breakfast, but you still need the control to tell you what you are comparing your results to overall.Control group definition (biology online): "A group in a scientific experiment where the factor being tested is not applied so that it may serve as a standard".
Foods that are high in glucose are more dangerous than fatty foods. The noted fact that blood flow decreased in the extremities of the tested subjects by 20% is normal with any large meal for about an hour because more and more blood is recruited to the torso and the stomache area to process the new liquids and foods.
correct me if i'm wrong. after eating food, blood flow get's diverted to the digestive system. after sleeping there wouldn't be any food left in the stomach and small intestine, hence less blood flow there. after eating, blood would flow to those areas. hence less blood flow to the extremities, not caused by fat deposits. not to say that there isn't an affect from LDL's, HDL's, or VHDL's but that seems like a major confounding factor.
dude the Vampire Squid is drinking the blood of the sea
i paused the video right at 36 seconds to load it and died laughing. hank is giving a pitiful face that looks slightly worried
Hank,
I have the tiny chicken disease.
This video (for some reason) cheered me up a lot.
Thanks =D
you could always cover the swedish holiday midsommar :) or midsummer as you would say, most fun holiday EVER!
"Vampire Squid"
I didn't need to sleep tonight anyway...
It's not a 'scare' if it's true. And he is right - we all do a lot of things that are bad for us, but knowing the consequences is kind of important.
I'm seriously wondering why these videos viewed numbers aren't in the thousands.
I have a thought: did the researchers who performed the fatty foods study use a control group of people who ate a lower calorie meal, to compare the effects between the two groups? I have a suspicion that blood flow tends to centralize in the body after a meal in order to absorb the new nutrients. Our bodys do have ways of purposefully diverting bloodflow.
Please do a video over food allergies and the desensitization treatment that is now being used on people with these food allergies!
I have been watching this guy for 5 hours. HELP ME!!!
if the experiment was between having no breakfast and having a large breakfast couldn't it just be the body diverting energy to the stomach to aid digestion? same sort of thing as feeling sleepy after a huge Christmas dinner...
Correct me if I'm wrong, but I would think that the decreased blood flow to the extremities after eating fatty food would not be caused by the build-up of fat in arteries, but rather the blood being sent to the digestive system instead?
This is the best scishow on the web...eat your heart out Bill Nye
I don't smoke but I know self-destructive instincts runs deep.
i love SciShow !
The vampire squid was on my daughters cartoon today!!! CRAZY! Love it :)
Great video but I do have to say, methylation (and acetylation) can occur throughout life and it is caused by either acetyl or methyl groups binding to the histones that serve as a spool for sections of DNA. Also the decrease in blood pressure could be due to something called postprandial somnolence which is when blood is redirected from the extremities (including the head) to the digestive system, this is also the reason you get tired after large meals. The more you know! :)
Pretty good video, the Vampire Squid is an interesting creature :)
And one point about smoking, I agree that it is dangerous to a smoker's health, but: It is tenfold more dangerous for a non-smoker to complain about a smoker - smoking. :)
An elephant that says "I like it" without knowing what it means. It can create some awkward moments, I imagine.
I like how when he pronounces a word there's an annotation to show us how it's spelled :P
Finally, John's dream of the rise of the elephant civilization will become a reality!
The decrease in blood flow after the meal may be due to post-prandial hyperemia. This is the increased blood flow to the digestive tract after a meal to aid digestion and carry the absorbed nutrients. It might have nothing to do with the fat content.
I love this channel... i just... LOVE IT!
Haha I was so confused at first when you said Thanksgiving was coming up soon, I was like 'Thanksgiving has already happened.... like a month ago.... Whaa????' Than I remembered, Oh Yeah, America had a different thanksgiving then Canada. I Love SciShow :D
Nice show, man - thanks!
Ok, this smoking bit is exciting to me (partly because I am asthmatic). First of all, it explains why there is so much more asthma nowadays than in olden times. But more importantly, if we can narrow in on the epigenetic factors which cause it, we might be able to cure it. At least in progeny. Yay!!!
I'm not convinced eating no food is a good control by itself.
I'm so psyched that you mentioned Calgary
I am South Korean and it was so weird but awesome to see Koshik speak korean!!!!
I cannot help but think, concerning the fat study, that they are overlooking several factors, the first I thought of being the fact that after consumption, blood is redirected to the digestive system, esp the intestine. Food for thought, if you will.
"Smoking is obviously..."
He said that as I was moving the flame up to my cigarette. What a coincident
Or maybe you don't understand. If the experiment was performed as Hank described then it doesn't tell us that the high fat content caused the results shown. It could be that *eating breakfast at all* has those effects. The control should help experimenters to isolate the thing they are testing. It is the "all other things being equal" comparison.
Okay, so here is something I have been really wondering for while now and was curious if you could answer it: How are tattoos able to be permanent? I was thinking about how we are constantly shedding skin cells. I could see them lasting for a while but after a few decades shouldn't all of the skin be new? I don't know a lot of biology or information on human skin cells. So I was just thinking maybe you could explain it. Thanks!
THIS IS SO FREAKING AWESOME
when thanksgiving ROLLS! around this year. Puns upon puns upon puns.
"..Zoiberg speaking Korean.."
Brilliant!
That elephant really DID say God in Korean! That was awesome!
Thanks!
Hank could you do an episode about the immune system and autoimmune diseases such as Lupus and MS?
Thanks.
The next sci show news or whatever can you talk about how deep sea fish create biolimunes or how some shrimps shoot glowing fluids?
Well, that explains a lot. Confirming my own observations and experiences.
I's like to see Samhain! (And how it ties in with many many other holidays, Halloween included)
Good old British Bonfire Night is rolling around the corner this weekend, too. :)
You should totally do an episode on the science of Echolocation
Did you know that you're 20 times more likely to get hit by a meteorite if you smoke? Me either, just made it up. It's against smoking, through, so it must be a fact.
Here i am watching this round halloween 2016 nice, Thanks youtube!!
That thing about low blood pressure in the extremities after eating fatty food, that could just be since all the blood is being sent to the GI tract instead? Lipids are hard to digest so this would be expected...