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The longevity supplement industry has built itself around NAD+ precursors. The research behind those products is real but smaller in effect than the marketing implies. Here is the sharp version of the comparison, plus where the actual evidence sits.

A history of GHK-Cu from its 1973 isolation in human plasma to the modern skin and connective-tissue research that put it on the protocol radar, and what the published work actually supports.

A patient explainer on Epitalon, where the research came from, what the proposed mechanism is, and how to think about a compound whose evidence base is real but more limited than the longevity-supplement marketing suggests.

A measured clinical summary of MOTS-c, the 16-amino-acid peptide encoded inside mitochondrial DNA, what the published research actually shows in animal models and early human work, and where the compound sits in a longevity-context protocol.

A sharp look at Selank, why this anxiolytic peptide has stayed niche while less-evidenced compounds got mainstream attention, and what the published research actually supports for buyers cutting through the marketing.

An investigative read of Semax, where the cognitive-research claims hold up, where the marketing runs ahead of the data, and what realistic expectations look like for the compound.

A measured clinical summary of Thymosin Alpha-1 (Tα1), the 28-amino-acid immune-modulating peptide with the deepest regulatory and clinical track record in the peptide-research catalogue, and what the published work supports for protocol use.

A direct, practical guide to the CJC-1295 + Ipamorelin stack. What each compound does, why they pair, dose patterns, timing around sleep and training, and where the stack earns its place in a research protocol.