People who are fit and healthy and eat a keto diet sometimes have high cholesterol — but this claim says their arteries aren't more clogged than others with lower cholesterol.

People who are lean and healthy and eat a strict low-carb keto diet for years — even if it raises their 'bad' cholesterol a lot — don’t seem to have more heart plaque than similar people with lower cholesterol.

Even if healthy, slim people on a keto diet have very high 'bad' cholesterol, it doesn't seem to be linked to buildup in their heart arteries.

Some fit people who eat only meat might have surprisingly high 'good' cholesterol and low triglycerides—even though their 'bad' cholesterol is also very high—based on a couple of real cases.

Some fit, active people who eat only meat end up with very high 'good' cholesterol, sky-high 'bad' cholesterol, and low blood fats — but still seem metabolically healthy. Scientists call this rare combo the 'lean mass hyper-responder' type.

People who eat a lot of fat and very few carbs tend to have higher cholesterol numbers than those who eat plant-based or mixed diets, and more than 7 in 10 of them have cholesterol levels that doctors consider too high—especially if they’re eating super low-carb.