Peptides people talk about for skin & anti-aging.

A naturally occurring copper-binding tripeptide with genuinely decent evidence — as a topical skincare ingredient. The moment people start injecting it as a 'youth reset,' the evidence falls off a cliff.

A tiny anti-inflammatory tripeptide, the 'K' bolted onto the GLOW stack to make KLOW. Sold as the gut/inflammation add-on — with essentially no human data behind it.