Ketogenic low-carb diets are actually high in fat, with modest amounts of protein and of course very few carbs. Despite being extremely unbalanced in macronutrients, these controversial diets attract a lot of interest. Advocates say that the metabolic state of ketosis produces greater fat loss than other diets. That claim has never been proven. They also claim a high fat intake is not inherently unhealthy. On this point, they’re not entirely wrong.

