By the 1940s, coronary heart disease was the leading cause of death in the United States. America is never a nation to roll over and die, so physicians and scientists got to work researching causes and preventive measures. That decade saw the birth of several heart health studies, like the Seven Countries Study and the Framingham Heart Study, which, as La Berge puts it, “suggested a strong correlation between diets high in saturated fats and cholesterol and increased incidence of cardiovascular disease.”
The ketogenic diet is super popular these days, but following it can be challenging. The plan requires a lot of diligence, as eating too many carbohydrates can knock you out of fat-burning mode, also known as ketosis. Keto dieters eat large amounts of fat, a moderate amount of protein, and only 20-30 grams of carbohydrates per day—or about half a medium bagel—to maintain ketosis.