The argument is that peptides encourage the body to carry out processes it already has pathways for such as secreting growth hormone, regulating cortisol, or improving circulation rather than introducing entirely foreign chemistry
A 99% COA proves the product is safe. Chromatographic purity can support one part of chemical assessment
2011 Aug;94(8):4016-27
However, issues such as the relationship between the pathways, the existence of reciprocal regulatory roles of different pathways, and the rules of mitophagy receptor regulation under different physiological conditions remain to be resolved
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But much of aging happens underneath, at the chromosomal level, where protective telomere caps gradually shorten