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.
Fat-Restricted Diet Basics A fat-restricted diet typically limits fat intake to 50 grams per day. Fat contains nine calories per gram. So, if you need a total of 2,000 calories per day, this means that only about 22% of those calories can be from fat. The rest should be from carbohydrate or protein. For most people, it's possible to meet all nutrient requirements on this diet.