The National Lipid Association and Lifestyle Task force define low-carbohydrate diets and those containing less then 25% of calories from carbohydrates, and very low carbohydrate diets being those containing less than 10% carbohydrates. A 2016 review of low-carbohydrate diets referred to diets with 50g of carbohydrate per day (less than 10% of total calories) as "very low" and diets with 40% of calories from carbohydrates as "mild" low-carbohydrate diets.