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Milk. White Poison or Healthy Drink?
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Over the last decade, milk has become a bit controversial.
Some people say it's a necessary and nutritious food, vital for healthy bones,
but others say it can cause cancer and lead to an early death.
So, who's right?
And why are we drinking it anyway?
[Intro music]
Milk is the basis of every mammal's diet after birth,
when our digestive systems are immature and small.
Basically, it's power food to kick-start our bodies and help us grow.
Milk is rich in fat, vitamins, minerals, and milk-sugar: lactose.
On top of that, for a while after birth, it also contains antibodies and proteins
that protect us from infections and regulate our immune system.
But it's a lot of effort for mothers to produce.
Eventually, humans stop drinking mother's milk
and transition to the diet of their parents.
This is how it's been for thousands of years.
Until about eleven thousand years ago,
when our ancestors settled down in the first agricultural communities.
Soon, they domesticated the first dairy animals:
goats, sheep, and cattle.
They found that dairy animals are able to eat useless and abundant stuff
and turn it into nutritious and tasty food.
This made a huge difference in terms of survival,
especially in hard times.
So groups that had milk available had an evolutionary advantage.
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