Milk Is Just Filtered Blood

Published on Apr 12, 2018
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Female mammals make milk, a cocktail of filtered blood, to provide their babies with vital nutrients.
Thanks also to our Patreon patrons and our US-tv sponsors.
To learn more, start your googling with these keywords:
Mammal: Endothermic vertebrates that nurse their young.
Lactation: The secretion of milk by the mammary glands.
Mammary Gland: A cluster of alveoli and ducts that secretes milk.
Mammary Alveoli: The tiny sacs that are the site of milk production and storage in the mammary gland.
Oxytocin: A hormone released by the pituitary gland that - among other things - causes the milk ejection reflex during nursing.
Holstein: A large black and white cow known for the large quantities of milk it yields.

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Credits (and Twitter handles):
Script Writer: David Goldenberg (@dgoldenberg)
Script Editor: Emily Elert (@eelert)
Video Illustrator: Qingyang Chen (@QCVisual)
Video Director: David Goldenberg (@dgoldenberg)
Video Narrator: Emily Elert (@eelert)
With Contributions From: Henry Reich, Alex Reich, Kate Yoshida, Ever Salazar, Peter Reich
Music by: Nathaniel Schroeder:

Skibiel, A., Downing, L., Orr, T., and Hood, W. (2013).The Evolution Of The Nutrient Composition Of Mammalian Milks. Journal of Animal Ecology. 82 (6): 1254-1264. Retrieved from:
Sharp, J., Wanyonyi, S., Modepalli, V., Watt, A., Kuruppath, S., Hinds, L., Kumar, A., Abud, H., Lefevre, C., and Nicholas, K. (2017). The Tammar Wallaby: A Marsupial Model To Examine The Timed Delivery And Role Of Bioactives In Milk. General and Comparative Endocrinology. 244: 164-177. Retrieved from:
Tsuruta, S., Misztal, I., and Lawlor, T. (2004). Genetic Correlations Among Production, Body Size, Udder,and Productive Life Traits Over Time in Holsteins. Journal of Dairy Science. 87(5):1457-1468. Retrieved from:
Nicholas, K. (1988). Asynchronous Dual Lactation In A Marsupial, The Tammar Wallaby. Biochemical and Biophysical Research Communications. 154 (2): 529-536. Retrieved from:


  • Hi there - we appreciate that the “just filtered” part of our title has drawn a few comments and we want to address it. First off - you’re right; you could say lots of things are filtered blood products, including urine and even the carbon dioxide we breathe out. We decided to make this video because we believe most people, including ourselves, don’t think about how the same thing is true for a substance a lot of us drink every day - milk from an animal - and that communicating that fact would lead folks to a different appreciation of what milk is. Secondly - you’re also right; we didn’t fully convey the amazing things that the mammary gland does. Almost all of the precursors to the stuff in milk DO come from the bloodstream, but the special cells in the mammary gland transform many of them into their final milky forms, which we simplified in the video as “do some chemistry on them” and in the title as “filtered.”

  • or maybe I drink my blood a bit

  • I feel that people will be discussed... or maybe O+ taste good

  • I'm a vampire... I like to drink my blood,it's fine 👌

  • The reason why I which to SOY milk

  • #AlmondMilkForTheWin

  • I drank milk before this vid

  • The bad joke of all this is that cow's milk is cheaper than nuts. Atte least un muy country.

  • 0:24 wtf they need sugar We are mammals too *Wtf baby needs a lot of sugar!!!!!!*

  • I feel bad for that cow that produce a bathtub full of milk a day.

  • Bruh.

  • That will be never happened

  • I don't know how I feel about milk now lol


  • Vegans ruin everything and now they are trying to ruin ice cream for us! Fuck you, vegans!.

  • Me:reads title* Me:PFFFTTTTTT(spits out milk) EEWWW MOOOOOM NO MORE MILK IN THE HOUSE


  • No offense but y’all are stupid

  • It hink I have to throw up On the other hand, honey is just bee puke and I still like it so I also can get used to the idea of drinking filtered cow blood.

  • so im drinking blood oh no god

  • I'm not very bothered by this If blood is tasty,blood is tasty end of story

  • Fakw

  • Not true

  • I saw the baby bunny and immediately thought of jungkook! #ARMY

  • I guess that means I drink filtered cow blood every night... Wierd. X3 WAIT! WHY DO I EVEN CARE!? BLOOD IS DELICIOUS! (I am like a real vampire. And my uncles and my dad all have sharp canines. When I get my fangs, imma be a vampire! '^^

  • Oof why I don’t drink milk to be honest also I don’t drink milk because when I think about milk all I can picture in my head is suffering cows getting their calfs taken away and getting their milk stolen...

  • Anyone else lactose intolerant and just watched this because they were also vegan?

  • Lol

  • Im evil

  • Can we also just address how disturbing it would be if baby cows drank straight blood.

  • ... I’m gonna start drinking almond milk


  • Aww hell yeah! Now I know that milks more nutritious for me! Thanks!

  • I still like milks

  • I love drinking blood so I do not care about this

  • Don't stop drinking milk though unless you wanna look like Daequan.

  • Minute earth is Wong!!

  • No

  • "Do some chemistry on them." Not a good source.

  • I love milk but I'm kinda grossed auto 🐄🤢🤒

  • If pluto was in earths place and was big enough can we survive

  • I always drink milk

  • I'm going to comment about this on stacyplays channel cause she loves to drink milk

  • this was disturbing

  • mmm yum filtered cow blood


  • Water is just filtered, blood, poo, pee, etc. *yes I know this comment makes no sense*

  • I don’t drink milk ;-;


  • I’m thankful I’m lactose intolerant

  • i Dont care Its Still More yummy As Milk Still Milk is Blood? I Dont Care!

  • Hey, I’ve heard of African tribes drinking cow blood so that they can be rich in iron and minerals and for religious and traditional reasons. So for wimpy kids like me, milk is the best way to go. (I love milk, omg 😂)

  • Ha. Glad I’m vegan 🌱

  • uhm i drink milk so im now a vampire?

  • Did you say teats

  • :0 MY COOKIES...

  • lol the way how she said tit

  • It's not really blood.

  • *eats cereal* *reads thumbnail* Me: *spits out cereal* Ewwwww What the fuck!

  • *when i see this video while drinking milk then looks at cup* me:aahh mom:calm down im just useing my dads account

  • idgaf

  • pojebalo wam sie w glowie od tego braku miesa

  • The oxytocin is so cute hehe

  • Disgusting

  • my sister is having milk right now she is driking blood😨😰

  • blood is just boneless milk

  • *slowly pushes away box of cow milk* 😶

  • My mom drink almond milk

  • Wait so we were vampires when we were kids?

  • i last consumed milk 2 years ago , cus its full of bacterias , and hormones , just stop consuming milk for a week you will see massive difference in your health.

  • I think it’s filtered pee

  • Not true

  • First of all how dare u

  • I drink my own blood so cow blood ist that bad

  • I don't like milk

  • Did you know that meat is chopped up animals?

  • 3A

  • WHT ever

  • I just drank a glass of milk!!!!

  • -.- Okay..

  • 2,000 people who watched this are ignorant meat eaters and vegans.

  • Wow that was strange but intresting

  • Thanks for ruining milk!

  • Oh please like I'm going to believe that. Cause that is not true

  • Im never drinking milk again...

  • that not real

  • You have ruined my childhood

  • drink milk anyways

  • This makes vampires seem less evil

  • who the heck cares? milk is still healthy

  • good cow joke

  • I ate cereal while watching this.

  • Your not telling truth and people believe this stuff

  • That means o love blood

  • This is fake how did you guess that milk is made of blood it made from real cows milk not blood! Why alot of people drinking it but you are just bewaring them to drink milk! Then i got a question for you be honest pls: tell us it is real or no? Becuse if you say yes then ill belive but if you say no then this is fake

  • are You stupid or something

  • Ew and why

  • *no, it's malk*

  • Eww

  • f it im drinking choco milk