Notably, endogenous GHK-Cu levels in human plasma are age-dependent, dropping from ~200 ng/mL at age 20 to below 80 ng/mL after age 60
The following table summarizes the different delivery routes of commercially available glutathione
(PubMed) Gotz ME, Gerstner A, Harth R, et al
QUALITY ASSURED: Manufactured in the USA in an NSF-certified, GMP-compliant facility using high-quality ingredients and rigorous quality standards
Systemic tissue repair potential Beyond cosmetic applications, GHKs ability to accelerate tissue repair has been documented across multiple tissue types in research settings including bone tissue, lung connective tissue, liver, and gastrointestinal tract lining
Arch Dis Child Fetal Neonatal Ed 1999