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.
For a 2,000-calorie per day diet, the recommended daily fat intake is 44 to 78 grams. The recommended daily fat amounts for 1,500-calorie and 2,500-calorie diets are 33 to 58 grams and 56 to 97 grams, respectively.