Not sure if GHK-Cu is right for your goals
Amino acid mutations in the H-site can significantly alter the catalytical activity of GST enzymes towards their substrates [88, 89]
Glutathione can help your skin, but its not a miracle that works for everyone
Mtb can also incorporate propionyl-CoA into its cell wall, including the virulence-associated lipids phthiocerol dimycocerosates (PDIM) and the trehalose ester family (sulfolipid-1 (SL-1), diacyltrehalose, triacyltrehalose, and polyacyltrehalose), which are synthesised from malonyl-CoA (produced from acetyl CoA) and methylmalonyl-CoA (produced from propionyl-CoA) (Lee et al, 2013)
A careful reading of the literature therefore requires separating molecular identity, in vitro mechanism, preclinical animal-model outcomes, and human relevance as distinct levels of evidence