dietary supplement, metabolite or precursor enzyme supplement LanguaL curation note: Currently not used in US classification of dietary supplements. Plant and animal enzymes are used to facilitate the digestive process and improve the body's ability to maintain balanced metabolism. Enzyme supplements are extracted from plants like pineapple and papaya and from the organs of cows and pigs. The supplements are typically given in tablet or capsule form. Pancreatic enzymes may also be given by injection. The dosage varies with the condition being treated. For nondigestive ailments, the supplements are taken in the hour before meals so that they can be quickly absorbed into the blood. For digestive ailments, the supplements are taken immediately before meals accompanied by a large glass of fluids. Pancreatic enzymes may be accompanied by doses of vitamin A.[http://medical-dictionary.thefreedictionary.com/enzyme+therapy] requires discussion