glutathione synthetase - an overview glutathione sythesis Figure 2 from

Topical peptide safety proves exceptional with side effects limited to mild transient reactions - muscle-relaxing peptides occasionally cause temporary stinging or tingling upon application (5-10% of users), slight redness fading within 30 minutes (occasional), or mild dryness during initial use requiring moisturizer support

Why GHK-Cu Works Better Systemically (Not Just Topically) While GHK-Cu is commonly found in serums and post-procedure products, systemic delivery allows it to work beyond the surface of the skin

Proponents of GHK-Cu, a peptide found in human plasma, say it boosts collagen production and improves hair and skin

"Effects of topical glutathione treatment in rat ischemic wound model." Annals of Plastic Surgery