While GHK-Cu is generally well-tolerated in topical research, certain contraindications or precautions should be considered, especially for systemic research or in specific populations: Systemic Research: For systemic applications, GHK-Cu is generally not recommended for subjects who are pregnant, breastfeeding, have active cancer, or suffer from Wilsons disease (a condition involving copper accumulation)
While a single study might show that GHK-Cu stimulates collagen, a comprehensive review reveals that it simultaneously activates tissue repair genes, suppresses inflammatory genes, promotes blood vessel growth genes, and resets age-related gene changes painting a far more complete picture than any single experiment could
They're being clawed back
They implant Mu cells in, and the liver will accept the human liver for a period of time
Repeated use can damage cartilage and tendons