First off, always avoid fillers such as magnesium stearate, apple pectin and rice starch. When looking at the label of a high-quality enzyme product, you will find measurement units you may not recognize. With most supplements, we are used to comparing products based on weight. However, with enzymes, we are interested in the activity and potency available, which is measured in these specific units. It is important to recognize that there is no direct relationship between weight and enzyme activity.