Why Our Brains Love Junk Food

Hank explains the scientific reasons behind why we humans generally prefer to eat donut hamburgers to carrots.

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Diet & the evolution of the earliest human ancestors - http://www.pnas.org/content/97/25/13506.full
Australopithecus: Diet - http://en.wikipedia.org/wiki/Australopithicus#Diet
Did cooking make us human? - http://www.youtube.com/watch?v=rf_OWun4Y04

Видео загрузил: SciShow

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Добавлено: 4 года назад
Длительность: 3:29
Комментарии: 3805

Тэги для этого Видео:scishow  science  biology  health  junk food  fat  carbohydrate  omnivore  calorie  evolution  evolve  australopithecus  homo habilis  brain  digestion  digestive system  fire  cook  meat  energy  vegetable  diet  pleasure  comfort food  sugar  nutrition  

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Christian TurnerChristian Turner (8 дней назад)
I can't stomach the taste of carrots

HECKproductionsHECKproductions (14 дней назад)
i am really a fast foood guy and i eat way too much of it but if i had the choice between fries and carrots i would eat the carrots
fries on their own are fucking gross jeez

Matilda JauhiainenMatilda Jauhiainen (15 дней назад)
carrots or fries hmmm CARROTS I HATE FRIES RLY I AM ONLY

Zoe HeatonZoe Heaton (15 дней назад)
for some strange reason i just really want carrots

GuoenyiGuoenyi (25 дней назад)
Id get the carrots. I don't want constipation thanks.

Justin LemmeJustin Lemme (25 дней назад)
Can you do an episode on Celiac Disease?

ShadowTheSoullessShadowTheSoulless (1 месяц назад)
I'm not fond of raw carrots but if it was 'broccoli or fries' i'd eat the broccoli , only if it was steamed. or a banana, im nto a big fry person sry. now if it was Chesse cake or broccoli... id pick cheese cake.

2Awesome2Awesome (1 месяц назад)
So much for not talking with your mouth full...

Grace MadelineGrace Madeline (1 месяц назад)
@all vegans/vegetarians who insist humans are supposed to be herbivores (and I'm vegetarian, but I hate this misinformation)

Benjamin MalaveBenjamin Malave (1 месяц назад)
Carrots vs. French Fries is not a fair comparison, as the latter is a prepared food. What about carrots vs. potatoes?

Michael HartmanMichael Hartman (1 месяц назад)
Why do we prefer some foods hot, and some foods cold?

i hate gmaili hate gmail (2 месяца назад)
gimme both dude, theyre both delicious

Podigy VideoPodigy Video (2 месяца назад)
How about sweet potato fries
They are healthy and tasty

green teagreen tea (2 месяца назад)
we're not omnivores

arrozblanco7arrozblanco7 (2 месяца назад)
Carrots over Frenchfries? Why you always lying..

BonziBuddyBonziBuddy (2 месяца назад)
Proof that vegans are dumb as shit.

Herobrine 37Herobrine 37 (3 месяца назад)
I´m for fries (Note: I´m not eating fries frequently) :D

random mcr fanrandom mcr fan (3 месяца назад)
I don't like hugs

Natroya PowellNatroya Powell (5 месяцев назад)
who tf still believes that we evolved from apes

Rudie PunkRudie Punk (4 месяца назад)
indeed we share common ancestor with apes, thus family

TRUMP 2016TRUMP 2016 (4 месяца назад)
Natroya Powell early humans weren't apes. They were ape like creatures. Please take some time to actually do research first. 😂

Natroya PowellNatroya Powell (4 месяца назад)
TRUMP 2016 if we evolved from apes they wouldn't still exist today. That's just how evolution works 😭😭

TRUMP 2016TRUMP 2016 (4 месяца назад)
Natroya Powell non ignorant people unlike your dumbass

BlueberryBumblebeesBlueberryBumblebees (5 месяцев назад)
I find this video as I'm eating ramen made with garlic powder and cayenne, drained, with a tab of butter...

Savannah RainesSavannah Raines (5 месяцев назад)

TheBoltMasterTheBoltMaster (6 месяцев назад)
I eat nothing but fast food for 15 days straight,doesn't even gain a pound...STOP MAKING FUN OF ME OK! I'M JUST SHORT AND SKINNY THIS WAY! XD

Michael MaximeMichael Maxime (6 месяцев назад)
so that's why L eats all those sweets!

The LikeAble FanThe LikeAble Fan (5 месяцев назад)
Lawliet burns calories with his brain.

Lizica DumitruLizica Dumitru (7 месяцев назад)
but fries are nutritious...for my brain...evidently

Ito RiIto Ri (8 месяцев назад)
"I swear this is going to be the last SciShow video of today..."
*finishes video*
*clicks on another SciShow video*
There are so much videos like tf help me

Drage dkDrage dk (23 дня назад)
Brian southparkstudio haha ;)

Brian southparkstudioBrian southparkstudio (5 месяцев назад)
this is going to be the last scishow video of the day....... it's 23.59

Lerd NerdaderdLerd Nerdaderd (8 месяцев назад)
Hank: and our brains are like YEAH!

Reaty LaikoReaty Laiko (9 месяцев назад)
I love Carrots....
French fries ... meh....

Rishab ManralRishab Manral (9 месяцев назад)
do you ever blink bro

greg furtieregreg furtiere (10 месяцев назад)
i like carrots in my bum,

Rata TouilleRata Touille (10 месяцев назад)
2:56 You should say " Whats up doc?"

Simos53/Glen53 Gaming and moreSimos53/Glen53 Gaming and more (6 месяцев назад)
Rata Touille lel

Federico OlivaresFederico Olivares (10 месяцев назад)
do not talk with your mouth full...

Lorand DekaLorand Deka (5 месяцев назад)
Plus didn't your mom teach you it's not polite to point....

Bhaalspawn84Bhaalspawn84 (11 месяцев назад)
Honestly i'd eat half of a carrot then fries then carrots to the fridge until forgotten&moldy.

SuperRacistKid 916SuperRacistKid 916 (1 год назад)
I love French fries.....


Shih TownShih Town (1 год назад)
+Andrei Joaca Gaming/TheGuyWhoTrolledYou can't really tell jokes when all i see is words, and i dont hear tone. sry

SuperRacistKid 916SuperRacistKid 916 (1 год назад)
+Shih Town why can't you handle a 1 joke?
Btw I rather eat carrots and fries

Shih TownShih Town (1 год назад)
+Andrei Joaca Gaming/TheGuyWhoTrolledYou Carrots, in my opinion, NOT yours, are great. Fries are good too.

The Leaving GooseThe Leaving Goose (1 год назад)
I'd go with potato, baked potato that is.

Rylee MatthewRylee Matthew (1 год назад)
The brain demands fat foods because it loves it, the rest of the body screams in pain with every bite. Not literally, though.

InklyInkly (1 год назад)
I love carrots....

JazzyJazzy (1 год назад)
the fries are prepared, the carrots are not. I would much rather eat roasted carrots with seasonings than fries. don't get me wrong, I love fries, I'd choose them over the raw carrot any day. but it's not quite a fair fight to pit a food that's already cooked and ready to eat against raw food that doesn't even look washed yet.

ghostbirdofpreyghostbirdofprey (11 месяцев назад)
Meanwhile, I think that plate of fries looks old and soggy, whereas the carrots do not.
besides, raw carrot is fine, raw potato, not so much.

R TexR Tex (1 год назад)
That is one hairy grandma Hank! (Mind blowing hint: Not human and not a human ancestor.)

啊啊啊啊啊啊 (1 год назад)
not gonna lie to myself, i would always chose the fries

ThexsillyxzoneThexsillyxzone (1 год назад)

BetsyBlueBetsyBlue (1 год назад)
Yasssssss. in fact going to grab a doughnut .

Ray DavisRay Davis (1 год назад)
I was eating a snickers bar while watching this 😁

BobbyBobby (1 год назад)
"Which would you rather eat?"


Lenny Is A CarrotLenny Is A Carrot (1 год назад)
I'd rather eat carrots. Honestly, I love them. I'm not a very big fan of French fries.

youtube fanyoutube fan (1 год назад)
What about no oil unsalted baked sweet potato fries?

youtube fanyoutube fan (1 год назад)
We're herbivores...

Patrick BatemanPatrick Bateman (7 месяцев назад)
that can eat meat with the side effect of clogged arteries

Dalek ShitPosterDalek ShitPoster (1 год назад)
At The Start
Why Not Both?

Bunne KuiperBunne Kuiper (1 год назад)
exactly what i was thinking

Ow! My Eye!Ow! My Eye! (1 год назад)
Carrots are just too unpredictable. You never know if you're going to get something sweet and delicious or if you're going to get something nasty and bitter. Usually, you just end up with pure blandness.

ghostbirdofpreyghostbirdofprey (11 месяцев назад)
This is why nobody eats the carrots and celery that come with their chicken wings.
The bland ass produce that comes on the Sysco truck is a crime against agriculture.

L0b5terlickL0b5terlick (1 год назад)
Why did my mouth taste like carrot when I heard that sound?

josey428josey428 (1 год назад)

josey428josey428 (1 год назад)

Hall KidsHall Kids (1 год назад)
meat is better

Seqouya TraeSeqouya Trae (1 год назад)
can i just have a bottle of ketchep instead

Christian CecereChristian Cecere (1 год назад)
hank, don't talk with your mouth full. lol

MiyuxxKankuroMiyuxxKankuro (1 год назад)
People keep saying they wants carrots over fries and I'm just like...

🎶 Why the fuck you lyiin'?
🎶Why you always lyin'?
🎶 Mmmm Oh my God!
🎶Stop fuckin' lyin'!

David HuntDavid Hunt (4 месяца назад)
MiyuxxKankuro well I'm normal and would take the fries unlike these other creeps

RusticKeyRusticKey (1 год назад)
+MiyuxxKankuro It's not lying if I prefer boiled potatoes over french fries (because they're super oily and sometimes too salty), and also, _NOTHING BEATS A BROTH WITH CUT CARROTS_.

TomiplyTomiply (1 год назад)
+MiyuxxKankuro I actually don't like French fries that much, so I'd pick carrots over them. I like a lot of fat food, just not French fries.

MiyuxxKankuroMiyuxxKankuro (1 год назад)
People keep saying they wants carrots over fries and I'm just like...

🎶 Why the fuck you lyiin'?
🎶Why you always lyin'?
🎶 Mmmm Oh my God!
🎶Stop fuckin' lyin'!

JJ _The_EntJJ _The_Ent (1 год назад)

Nuclearsheep 53Nuclearsheep 53 (1 год назад)
hank reminds me of my english teacher keith thompsen.

AlmightyCarrotAlmightyCarrot (1 год назад)
Don't you dare eat those carrots!

GeekGirl2KGeekGirl2K (1 год назад)
Give me the carrot please!

Deniz KaraDeniz Kara (1 год назад)
Than fry the carrots. Julienne cut them, than fry with your choice of oil. On a separate cup prepare some yogurt sauce by whipping some yogurt, 2-3 cloves of grated garlic, olive oil and salt. pour over your fried carrots. Bon appetite. Much tastier than french fries, and still carrots. (you can do the same with eggplants, zucchinis, whatever vegetable you see fit)

JazzyJazzy (1 год назад)
+CodeDarkBlue A carrot

CodeDarkBlueCodeDarkBlue (1 год назад)
+Jewell Cary What crawled up your butt and died?

Deniz KaraDeniz Kara (1 год назад)
Who eats just one carrot. Do you have the stomach of a bunny.

Jewell CaryJewell Cary (1 год назад)
Oh thanks Bobby flay, I'll keep that in mind when I want to wash a ton of dishes to eat a fucking carrot.

Tina HankenTina Hanken (1 год назад)
On the vaery first question, both

dweezel theyoungerdweezel theyounger (1 год назад)
Ah yes! It makes perfect sense! Our brains "evolve" toward what we really need and what furthers our evolution and will ensure our existence! That's why we love junk food, and pot, and heroin, and alcohol, and....wait, that doesn't make sense. Evolution favors our destruction? What a silly video indeed!

The truth is there are no scientific explanations as to why we love junk food other than a cheeseburger tastes way better than a carrot. FAT TASTES GOOD! It tastes good not because our brains know we need carbs, but because fat induces different responses chemically on the tongue and in our systems than other foods. We're also induce chemically by processed food manufactures to love their foods artificially. No big mystery here, and it has nothing to do with evolution at all. We get videos like this when we try to fit real life into fantasy.

Daniel BroderickDaniel Broderick (1 год назад)
+James Denovan Well put

James DenovanJames Denovan (1 год назад)
Our brains did evolve to favour fats and sugars, and that is why they induce different chemical reactions, as you said. This is because that during evolutionary times, ancient humans were pretty unlikely to find such an energy-dense food as donuts just sitting there in the wild. Therefore, our brains evolved to love and crave this fatty taste, because it was so rare and energy-rich. But now here we are, kings of the earth as Hank put it, with all the carbs that we could possibly need one McDonalds away. So of course we are going to crave these foods which cause diabetes and obesity, because our brains simply have not had time to adapt to this new carbohydrate-filled, fatty diet in the past 50 years or so it has existed.
However, in the case of drugs such as alcohol and heroin, they induce pleasure in a way that is very different to junk food, by directly altering dopamine levels in the brain at the synaptic level.

dweezel theyoungerdweezel theyounger (1 год назад)
+Daniel Broderick


Daniel BroderickDaniel Broderick (1 год назад)
+dweezel theyounger Makes no difference, 6000 years isn't very long for evolution to catch up

dweezel theyoungerdweezel theyounger (1 год назад)
+Daniel Broderick They weren't Are you sure about that? Humans have cultivated the opium poppy and used the resin from its flowers as a medicinal and recreational drug since at least the time of the ancient Sumerians 5500 years ago in what is today known as Iraq. Pot is similar - with a long history, and alcohol goes back even further than that. Junk food? Well maybe. It's only been around since the 40's if you consider McD's to be the first appearance.

0NeonCreeper00NeonCreeper0 (1 год назад)
our brain prefers more of a good taste so when the brain sees broccoli noooo

Jasper TurckJasper Turck (1 год назад)

Griffin A. CurtisGriffin A. Curtis (1 год назад)
I chose the fries because I don't like carrots... If it was broccoli instead, screw fries!

-the only broccoli loving twelve year old in earth.

Zachary StephanZachary Stephan (1 год назад)
hank seems mildly intoxicated in this episode...

Winston ToskavichWinston Toskavich (1 год назад)
"we're kings of the freaking earth"~Hank 2012

FrozenTvDinnerFrozenTvDinner (1 год назад)

Matt JensenMatt Jensen (1 год назад)
How does the body know to induce the feeling that you can't breathe when you're running out of oxygen?

Albannie ParrisAlbannie Parris (1 год назад)
You know how we get urges for certain foods? Do you think that would be caused by lack of minerals contained in the certain food ? And if so, how would that account for the fact that we don't like some foods at all? Do we have enough of it in our bodies that we don't need the minerals and therefore our body rejects the thought of that food or is it just the design of our taste buds?

Ultra-NationalistUltra-Nationalist (1 год назад)
Your brain is like YEASSH. Your body is like NOO

Al RadiAl Radi (1 год назад)
hanks is too awesome!!

Sad AdiozSad Adioz (1 год назад)
The carrot looks and french look like they have stayed out in a month

马方杨马方杨 (1 год назад)
I always ask for one more lettuce in my burger, keeping healthy! ^^

Arielis zapataArielis zapata (1 год назад)
i love mcdonald chicken nuggets

Arielis zapataArielis zapata (1 год назад)
SAMEEEEEE!!!!! their soooo gooood 

Daniel BroderickDaniel Broderick (1 год назад)
My god they are so good and a 20 pack contains your entire daily amount of fat which makes me feel extremely guilty but I'll eat them anyways

Dávid KertészDávid Kertész (1 год назад)
I would totally go for the carrots. I love carrots.

Misha WuMisha Wu (1 год назад)
after shooting this video... "gimme the fries" 😂😂

TheOskar09TheOskar09 (1 год назад)
can you do a video about low-carb vs high-carb?. from the research i've done i have come to the conclusion that a high carb low fat diet is better for the human body and brain than LCHF.

Black MagicBlack Magic (1 год назад)
you re full of shit geek

Light 1988Light 1988 (1 год назад)
What specie were the genius homos?

Wayne LuWayne Lu (1 год назад)
FRIES!!! CARROTS!!! Oh my... Why don't you just make carrot fries?

Wayne LuWayne Lu (1 год назад)
+Samuel Brassard Hahah!

Wayne LuWayne Lu (1 год назад)

MorfeusMorfeus (1 год назад)
What? I answered carrots!

princessbinasprincessbinas (1 год назад)
Give me the carrot! I was eying the carrot more...

deathshot638deathshot638 (1 год назад)

Bob JonesBob Jones (1 год назад)
Yes, yes, junk food is actually good for you, among the most essential in fact. Just that too much of anything will kill you. Unless you're talking about artificial junk food ingredients that were designed to only replicate the pleasure effect.

Fade AmmoFade Ammo (1 год назад)
+Retro Gamer Mcdonalds

D. TravelD. Travel (1 год назад)
2:36! it is the same with junk books and movies. when your body adapt to it. it becomes your everyday need . potato is not bad for you. what is done from it is bad

Robert FarquharRobert Farquhar (1 год назад)
I like vegetables, meat etc even junk food like chips stuff like that but no sweets I don't like them except fruits

That SheepThat Sheep (1 год назад)
Anyone else get a carrot after watching this?

And our brains are like... YEAHHHHHHHHHHHH!!!!!!!!!!!!!!!!!!!!!!

me meme me (2 года назад)
French fries or carrots?

I rarely ever get eat some carrots! Lemme take those.
Wait- There were French fries?
Oh well, I'm done withy the carrots, take your plate back.

OniOni (2 года назад)
why would you eat a carrot without peeling it first?!

Eapple GamerzEapple Gamerz (1 год назад)
+Pekka Paco Nope. just casually trying to cause a youtube argument about hypocrites, then changing the subject of the argument inconspicuously so no one notices we're fighting about hypocrites and suddenly fighting about the color red. :D just youtube stuff.

Pekka PacoPekka Paco (1 год назад)
+Eapple Gamerz Aug 24 2015
..........................Jan 8 2016. Are you really still mad about being called a hypocrite?

Eapple GamerzEapple Gamerz (1 год назад)
+Pekka Paco "It's just a prank, bro!" If you don't get what I'm trying to say, then stop calling me a hypocrite anyways.

Syco316Syco316 (1 год назад)
+Pekka Paco for #3 everyone who watches YouTube videos. Lol

Eapple GamerzEapple Gamerz (1 год назад)
+Joseph Stalin hi im bob how r u? 

blacksheep837blacksheep837 (2 года назад)
Amazing how you have the nerve or the guts whichever one you want to admit to thinking that your ancestor was a monkey! I find that fascinating, I really don't know how you get up in the morning knowing that all you are or should I say thinking that all you are, is an Ape. How sad.

Pekka PacoPekka Paco (1 год назад)
+blacksheep837 You have 2.5% Neanderthal DNA... You can't deny scientific evidence..

Voult BoiyVoult Boiy (2 года назад)
Is it weird that when I go to the shop with some money I will always by a carrot?

matthew mannmatthew mann (2 года назад)
Sadly Ironically generally speaking it is usually the stuff that is bad for you that tastes better and more of the opposite for the stuff that is good for you maybe there is some middle ground though I mean Vegan and Soy foods I am sure can produce pretty good healthy stuff as well as protein maybe with smaller calories of fat.

Science whiz kidScience whiz kid (2 года назад)
I would take them both

AriphaelAriphael (2 года назад)
These french fries look shit, I'm going for carrot.

thegirlwarriorthegirlwarrior (23 дня назад)
Ariphael yah...

Ultra-NationalistUltra-Nationalist (2 года назад)
I don't believe in anything. Not even evolution or God or Islam or whatever. Its my freaking life im not changing it to some stupid god.

Bob BobinstonBob Bobinston (1 год назад)
+James Miller  It's a tad bit stupid, honestly, read a book about Charles Darwin and all the debates his theory had gotten into with religious folk.

Ultra-NationalistUltra-Nationalist (1 год назад)
+James Miller There isn´t much to ''discuss'' if we both think the same about a topic.

James MillerJames Miller (1 год назад)
+Random Banana Why?
If you're trying to say that I'm somehow mentally challenged, please explain your reasons for such a conclussion so that we may discuss them.

Ultra-NationalistUltra-Nationalist (1 год назад)
+James Miller Visit a doctor please :)

James MillerJames Miller (1 год назад)
+Random Banana All I'm trying to understand is why would you mention evolution and religion together the way you did. It almost looks like you think evolution is a religion...

GalaxyOfWaffles #GalaxyOfWaffles # (2 года назад)
Carrots or Frenchfries? Why not both! :D

Jordan WashkoJordan Washko (2 года назад)
Carrots I am a health nut

( Έρις )( Έρις ) (2 года назад)
Is this the guy from "it's ok to be smart" ??? O.o

Ten Sixty-SixTen Sixty-Six (2 года назад)
Is it weird that I was eating salad while watching this and I ate a donut and potato chips while watching chefs make vegetarian food?

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