modifications to thiol on glutathione Modification of proteins by glutathionylation. This reversible Thiol–disulfide exchange between glutathione (GSH)
Description
The practical question is not are peptides good or bad? It is what exact product is this, what category does it sit in, and has it been lawfully assessed or supplied in Australia? That distinction matters for consumers

Christie, 2008

Baseline characteristics of the non-interventional cohort of young adults and the interventional cohort of older adult volunteers are summarized in Table 1

NAD+ is generally more effective for cognitive enhancement
