ghk-cu vs glutathione

ghk-cu (S-tier) vs glutathione (D-tier). mechanism, trials, evidence boundaries, dosing literature. side-by-side reference.

ghk-cu · tier S

the copper peptide with the strongest skin evidence in the catalog. topical record first, injectable story thinner.

the copper peptide with the strongest cosmetic skin record on the site. the topical evidence is in front; the injectable story is a different conversation.

4,192 genes modulated · half-life plasma: minutes (rapidly peptidase-cleared); the ~12h figure is tissue detectability, not a plasma half-life · skin

glutathione · tier D

the endogenous redox tripeptide. used for antioxidant, liver, immune, wellness-IV, and skin-brightening claims. route decides the evidence.

the endogenous redox tripeptide. real biology, route-dependent evidence, marketing strength that outruns the outcome data.

supplement redox cofactor · half-life very short in plasma (minutes); intracellular concentrations in millimolar range · skin

at a glance

• ghk-cu: tier S · 4,192 genes modulated
• glutathione: tier D · supplement redox cofactor

reptides grades the research record and cites the literature behind every call. research reference only; not medical advice.