For a 2,000-calorie diet, this amounts to a maximum of 22 grams of saturated fat if youâre healthy, or just 15.5 grams if youâre worried about your heart. These fat grams take up some of your total fat gram allowance for the day.
Carbohydrates have six major functions within the body: 1  Providing energy and regulation of blood glucose. 2  Sparing the use of proteins for energy. 3  Breakdown of fatty acids and preventing ketosis. 4  Biological recognition processes. 5  Flavor and Sweeteners.
Carbohydrates, Proteins, Fats, and Blood Sugar. The body uses three main nutrients to function-carbohydrate, protein, and fat. These nutrients are digested into simpler compounds.Carbohydrates are used for energy (glucose). Fats are used for energy after they are broken into fatty acids.he body uses three main nutrients to function-carbohydrate, protein, and fat. These nutrients are digested into simpler compounds.