Typically sold in health food stores and retail pharmacies, these supplements may not always be tested for absorption, dissolution, purity, or potency. Additionally, these supplements do not always have the same concentrations of active ingredients as pharmaceutical grade. Food Grade supplements can have up to 30% impurities, fillers, and binders, and can be bleached or radiated to kill any contaminants. Up to 88 different chemicals can be added to the product, and they do not have to be listed on the label. Food Grade supplements are often processed with high heat which is not good for oily supplements.