Theyre different categories
It protects from oxidative stress and free radicals, boosts the immune system, improves skin, supports immune function, helps fight the overstimulation of melanin production, detoxification, and liver health, slows aging (yay!), and protects against a wide range of health issue and chronic diseases (heart disease, diabetes, chronic fatigue, etc.) Are Glutathione Injections Safe
No single receptor accounts for its activity
2008 Sep;326(3):745-53
GHK-Cu stands for Glycyl-L-Histidyl-L-Lysine-Copper , a naturally occurring tripeptide that binds to copper ions
Glucagon-like peptide-1 and the islet beta-cell: augmentation of cell proliferation and inhibition of apoptosis