IGF-1 Deer Antler Velvet Extract is harvested from the antlers of growing deer, moose, caribou, and elk prior to hardening, with no harm to the animal. Deer Antler is a potent source of IGF-1, a growth hormone beneficial to muscle, nerve, and cell repair. This product has been traditionally used for muscle strength and increased athletic performance, post workout recovery, anti-aging, improved sexual performance for men and women, joint support, and immune system operation.