Enzymes have active sites where they come into contact with particular substrates. The catalytic properties of enzymes are a cyclic process. Once a substrate has come into contact with the active site of an enzyme, it is modified by the enzyme to form the end product.
1 Reducing saturated fat to no more than 5 to 6 percent of total calories. 2  For someone eating 2,000 calories a day thatâs about 11 to 13 grams of saturated fat. 3  Reducing the percent of calories from trans fat.
Each gram of fat provides you with 9 calories. Fat should comprise 20 to 35 percent of your daily calorie intake. If you eat 2,000 calories per day, your fat intake should range from approximately 44 g to 78 g of fat per day. Most of your fat intake should be in the form of unsaturated fats, such as nuts, seeds, fatty fish and avocados. Your saturated fat intake should not exceed 10 percent, or 22 g per day. Trans fat should be limited to no more than 1 percent of total fat intake, or approximately 2 g per day. Like carbohydrates, protein contains 4 calories per gram. The AMDR for protein ranges significantly, from 10 to 35 percent of daily calories.