HGH Fragment 176-191 is the end of the 191-amino acid Human Growth Hormone molecular chain. GH is a hormone produced by the pituitary. HGH is the synthetic version produced in a lab; both are comprised of the same 191-amino acid chain. GH, in particular elevated levels through the use of HGH have long been associated with fat loss. They have also been associated with increases in muscularity, recovery and a host of health and anti-aging benefits. For HGH Frag 176-191, the concentration of action is only on the adipose fat cells, specifically by increasing lipolitic action