September 17, 2015 — A study published on Thursday in the journal Science reported that the ancestors of the Inuit evolved unique genetic adaptations for metabolizing omega-3s and other fatty acids. Those gene variants had drastic effects on Inuit’s bodies, reducing their heights and weights.

Rasmus Nielsen, a geneticist at the University of California, Berkeley, and an author of the new study, said that the discovery raised questions about whether omega-3 fats really were protective for everyone, despite decades of health advice. “The same diet may have different effects on different people,” he said.

Food is a powerful force in evolution. The more nutrients an animal can get, the more likely it is to survive and reproduce. Humans are no exception. When we encounter a new kind of food, natural selection may well favor those of us with genetic mutations that help us thrive on it.

Some people, for example, are able to digest milk throughout their lives. This genetic adaptation arose in societies that domesticated cattle thousands of years ago, in such places as Northern Europe and East Africa. People who trace their ancestry to other regions, by contrast, tend to more often be lactose-intolerant.

Read the full story at the New York Times