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Science 258:597603, PMID: 1329206 Rcasens M, Mayat E, Vignes M (1992) The multiple excitatory amino acid receptor subtypes and their putative interactions
- GSSG GSH - GSSG (precursors) GSH 3
The human data, while limited by sample size (n=20-40 across studies), documented measurable outcomes: Photoaging reversal: In a 12-week facial application study, participants using 2% GHK-Cu cream showed mean improvement scores of 4.8/10 in skin laxity, 5.6/10 in fine wrinkle depth, and 6.2/10 in overall photoaging appearance on physician-graded scales
Some individuals find applying cold before the morning BPC-157 injection, then rewarming, enhances the reactive hyperemia that aids peptide distribution
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