It stimulates the release of growth hormone (GH) and insulin-like growth factor-1 (IGF-1) in the body, which can promote muscle growth, fat loss, and overall well-being.Sometimes called Nutrobal, Ibutamoren, or MK 677, a growth hormone secretagogue with the ability to produce a heap of growth hormones and IGF-1 factor in humans. Ibutamoren is backed by many studies and is still being held by many ongoing investigations about its safety. Both Ibutamoren and Ligandrol are used for bulking but there are separate benefits bodybuilders could attain by stacking them both.