Therapeutic GHK-Cu simply restores levels that have declined with age bringing them closer to what you had at 20 rather than introducing something foreign
Annu Rev Biochem 45:559604 Bartoli GM, Sies H (1978) Reduced and oxidized glutathione efflux from liver
If it was reconstituted in bacteriostatic water, inspect it visually any cloudiness, particulates, or discoloration means the peptide has degraded irreversibly and should be discarded
How to Use Take as directed on the product label, or as recommended by your healthcare provider
Potential risks and contraindications Given the limited understanding of DSIPs mechanisms and effects in humans, certain risks and contraindications must be taken into consideration: Unknown long-term effects : The long-term safety of DSIP has not been well-established, and the potential risks associated with chronic use remain unclear
(2013) Glutathione catalysis and the reaction mechanisms of glutathione-dependent enzymes