The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
Just over the past 10,000 years, certain groups of humans have adapted to being able to consume dairy by taking this enzyme, lactase, that normally is just expressed in most of the world's population early in life to be able to metabolize lactose in breast milk. By extending the expression of that throughout life, now you can consume milk for your whole life.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
Diet is an incredible driver of selection. So um you know a very common example of natural selection is lactase persistence. So our ability to continue to consume milk past infancy. Um and that happened very quickly in in multiple different human populations. So it happened in Africa and it happened in Europe. Um and another example is uh the Greenlandic Inuit. A huge part of their diet was marine mammals that have really high lipid content. And so they actually evolved to be able to better metabolize those lipids so that it wouldn't, you know, kill them from heart disease or something like that.