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That distinction matters in a category where "copper peptide" is increasingly used as a marketing term rather than as proof of potency

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Yes, many people over 65 find glutathione supplementation to be a valuable part of their healthy aging routine

Clin Exp Immunol 198:326340 Poprac P, Jomova K, Simunkova M, Kollar V, Rhodes CJ, Valko M (2017) Targeting free radicals in oxidative stress-related human diseases

It is used to confirm the molecular weight and thus the identity of a peptide

R.FiniE.EmmiG.MattioliI.et al (2022)