When purchasing enzymes, it is important to notice how the units are measured on the supplement fact panel. With enzymes, listing the amount in weight, like milligrams (mg), is fairly meaningless because it doesn’t indicate the enzyme’s effectiveness. The Food Chemical Codex (FCC), which is created by the United States Pharmacopeia (USP), establishes the standard measurements for supplements. While most food or nutrients are based on weight, enzymes are measured by units of activity and potency, with no direct correlation between weight and units of activity. Proteases are measured in HUT (Hemoglobin Unit Tyrosine base). Amylase are measured in DU (Alpha-amylase Dextrinizing units); Lactase are measured in LacU (Lactase unit) and so forth.