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.
Now, with your ideal daily calorie intake in mind, all you need to do is figure out what 20-30% of it is. (Just multiply your calorie intake by 0.20 and 0.30.) Then, since 1 gram of fat contains 9 calories, just divide both of your answers by 9. The amount you get now is the ideal range for how many grams of fat you should eat each day.