Nutrition Myths
Should adults avoid drinking milk if other animals don't drink it?

SUMMARY

  • Other species of mammals don’t drink milk because of their inability to extract it, the lack of physical and mental capacity and, most importantly, due to different evolutionary paths.
  • The effects of milk on human health have no logical association with the fact that other adult animals don’t drink it.
Advertisement

ON THIS PAGE

Can adults drink milk?

This is a popular argument among some Paleo diet enthusiasts and vegans. They state that if other animals do not drink milk from other species, therefore, it must be unnatural and humans past infancy shouldn’t drink milk either.

There are two factors which make humans different from animals when it comes to milk consumption: our ability to extract milk from animals and the genetic changes that have occurred in some populations over thousands of years, as a result of that ability to extract milk.

Ability to extract milk from other mammals

Humans have a superior intelligence and the physical ability to extract milk from milkable domesticated animals. That’s a great advantage compared to other mammals. It started about 8,000-10,000 years ago, when our ancestors learned how to domesticate animals and then to extract milk without harming them. (1, 2, 3)

It is technically difficult and impractical for other adult animals to feed on milk from either their mother or animals of other species.

Genetic changes in humans but not in other mammals

After farming replaced hunting and gathering and the domestication of animals became widespread in some areas of the world, farmers started to extract and use milk. Initially they produced tolerable, low in lactose fermented dairy products such as yogurt or cheese.

People, who still were not able to produce the lactase enzyme, adapted slowly to this new source of nutrients. This change in the diet created a need for the breakdown of lactose, triggering a genetic mutation which spread over thousands of years to the surrounding areas. (1, 2)

The spread of these genetic mutations could only occur after many generations of consistent consumption of milk and milk products. Lactase persistence is currently found in approximately 32% of adults worldwide.

Please note, however, that outside those centers lactose intolerance is prevalent. (4, 5, 6)

In contrast, other mammals did not go through the same evolutionary path and so could not experience similar genetic mutations. The ability of mammals to produce lactase reduces during the weaning period, making them gradually lactose intolerant.

Logical aspect of the myth

It is also simply not logical to draw such a conclusion as in the myth question. Even if all the other mammals are unable to drink milk for any reason, we cannot assume that humans can’t. Moreover, there are many things that humans can do and eat that other mammals just can’t.

NUTRITION FACTS VS NUTRITION MYTHS

You will find a summary of the most common nutrition myths and evidence-based nutrition facts here.

Related Posts

Is milk bad for you? Evidence based benefits and risks Yes and no. If you drink more than your body can digest, suffer from an allergy to the cow's milk protein, have gastroenteritis or consume milk from bovine hormone injected cows, than the negative effects might outweigh ...
Does milk cause osteoporosis? Milk, dairy products and milk derived supplements are good for bone health. The acid-ash hypothesis, which this myth originated, has been disproven by many studies.
Bovine growth hormone in milk – what are the risks? Milk from cows injected with bovine growth hormone has an increased amounts of IGF-1, pus from the mastitis caused by growth hormone, and may contain antibiotic-resistant bacteria from antibiotics used to treat this mast...
Saturated fat – is it really bad for you? There is no evidence that saturated fat causes atherosclerosis or heart disease. Foods with saturated fat provide more health benefits than health risks.
Milk allergy symptoms and causes Milk allergy, or dairy allergy, is an adverse immune response to the protein in cow’s milk, that mainly affects children. The symptoms depend on the amount of dairy consumed and the severity of the allergy and include vo...
Advertisement
Advertisement

Get updates

Receive regular updates on nutrition myths, facts and curiosities. All based on the latest scientific evidence.