this post was submitted on 24 Feb 2025
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[–] [email protected] 4 points 2 months ago (6 children)

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?

[–] [email protected] 5 points 2 months ago (2 children)

Yes. It costs calories and nutrients.

[–] [email protected] 1 points 2 months ago (1 children)

But why then creating lactose in milk at all? Fat alone doesn't suffice?

[–] [email protected] 5 points 2 months ago

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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