LCHF diet Review : I am sure you have all heard at one point or another of a low carb high fat diet, or as many call it, the LCHF diet. The basic concept is you limit your carb intake to at or around 20 carbs a day and intake more natural fats such as certain oils, fat from meats, and sweet, sweet butter (and who doesn’t like a diet that tells you to eat more butter?)