This article is an on-site version of our Unhedged newsletter. Premium subscribers can sign up here to get the newsletter delivered every weekday. Standard subscribers can upgrade to Premium here, or explore all FT newsletters

The findings indicate that saturated fat, which can make up a larger share of some low-carb diets, may interact with a person’s genetic makeup to raise low-density lipoprotein (LDL) cholesterol, a major contributor to heart disease risk. This genetic influence could help explain why two people following similar diets can have very different cholesterol responses.