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GHK-Cu functions primarily as a carrier peptide, says dermatologist Ava Shamban

"I've tried fish oil, turmeric, and collagen-all of which helped a little

IGF-1 and Steroid Cycles Are They Used Together

[4] The same group showed in 1993 that GHK-Cu stimulated connective tissue accumulation in vivo in rats, increasing collagen deposition in sponge implants by 40% and glycosaminoglycan synthesis by over 200% compared to controls
