Lactose Intolerance Erasure
Lactose Intolerance Erasure
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135 comments
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Btw, is there a evolutionary cost to creating lactase? Because, why do we stop with it usually and only keep it if it has huge advantages?
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I would guess that humans have been around for what, 250k years? And that the vast majority of that didn't involve a whole lot of milk after age 4.
So it wouldn't have been to much advantage to be able to metabolize lactose.
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No, there is, you get more from your cattle, and on a individual level, less likely to starve.
Keeping Lactase happened at least twice; north europe and a group in west africa.
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Sure, if you a) keep mammals around and b) drink their milk. I'm not convinced domesticated animals have been a thing for all that long, evolutionarily. Long enough for some groups to have adapted, sure. We have adaptations for cooked food, too.
[Searches] Cattle probably around 10k years ago.
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Saudi Arabia too. I assume that camel milk came in pretty handy in early tribes surviving the deserts.
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Yes. It costs calories and nutrients.
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But why then creating lactose in milk at all? Fat alone doesn't suffice?
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It's easy to break down into glucose, which is important for bodily functions. Gluconeogenesis is a thing, but it is inefficient.
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135 comments