This product is rBST/rBGH free and comes from cows that are certified to be grass fed. This whey is very high in Immunoglobulin G (IgG) and L-cystine; both of which have been proven to significantly improve health. WARNING: This product contains DAIRY. Those with an allergy to dairy products should not take this product. Anyone who has an allergy to dairy may experience upset stomach or other allergic reactions, such as hives.