Evidence snapshot: The strongest human evidence comes from a 2-year randomized controlled trial in 65 healthy older adults (Nass et al., 2008, Annals of Internal Medicine) showing sustained GH/IGF-1 increases and preserved fat-free mass, plus an earlier short-term human polysomnography study on sleep (Copinschi et al., 1997, Neuroendocrinology, PMID 9349662)
For bodybuilding research, female-focused studies, or general metabolic exploration, the dosage calculator is an essential research tool
The 30-Day GHK-Cu Injection Cycle: Loading Phase, Maintenance Phase, and What to Expect The GHK-Cu dosage protocol is divided into two 15-day phases within a 30-day active window, followed by a 30-day rest period before the next cycle begins
J Natl Compr Canc Netw 4(4):328-47, 2006