1. Essential amino acid because the body can make it from other chemicals. A typical diet contains about 2 grams of glycine daily. The primary sources are protein-rich foods including meat, fish, dairy, and legumes. 2. Glycine is used for treating schizophrenia, stroke, benign prostatic hyperplasia (bph), and some rare inherited metabolic disorders. It is also used to protect kidneys from the harmful side effects of certain drugs used after organ transplantation as well as the liver from harmful effects of alcohol. Other uses include cancer prevention and memory enhancement. 3. Package: 25kgs/drum, double plastic-bag inside, aluminum foil bag or fiber drum outside. Storage: stored in a clean, cool, dry area; keep away from moisture and strong, direct light/heat. Shelf life:two years when properly stored.