HGH-Fragment 176-191 is part of the HGH molecule that is reponsible for fat loss. It is supposedly 10-12x more potent, and should be injected on an empty stomach before doing physical activity and before bed optimally. It helps to release fat cells into the blood stream to be used as energy. Induces lipolysis. 1000mcg a day max. I've used it, useless as fk. Don't waste your money lmfao