what is glutathione composed of what is glutathione composed of

Here is the caveat that most consumer articles omit: the tripeptide in that landmark study was AHK-Cu L-alanyl-L-histidyl-L-lysine copper, sometimes labeled copper tripeptide-3 not GHK-Cu

These are not suitable during pregnancy or breastfeeding (due to tretinoin)

Impaired Healing of a Cutaneous Wound in an Inducible Nitric Oxide Synthase-Knockout Mouse

They are not approved by the FDA for any medical use yet (unlike some peptides which are FDA-approved for certain conditions)

Ihara K, Yamaguchi S, Ueno N et al (2016) Expression of DNA double-strand break repair proteins predicts the response and prognosis of colorectal cancer patients undergoing oxaliplatin-based chemotherapy