South American tribe has least heart disease risk ever seen
US-based researchers have found a 'Tsimane' tribe in Bolivia to have the least risk of heart disease ever recorded. A study of 705 individuals showed 85% had no blood vessel blockages whatsoever. Researchers said that the hunter-gatherers had a low-fat, high-carbohydrate diet with lots of physical activity leading to an 80-year-old Tsimane having the "vascular age" of a 50-year-old American.