KPV

KPV is a tripeptide made of three amino acids -- lysine, proline, and valine -- corresponding to the tail end of a natural hormone called alpha-melanocyte-stimulating hormone (alpha-MSH). Researchers became interested in it because the parent hormone has well-documented anti-inflammatory activity, and this tiny fragment appears to retain some of that effect while being simpler and easier to study.

The leading idea is that KPV dampens inflammatory signaling inside cells rather than acting through the pigment-related receptors that full alpha-MSH uses. In laboratory models it has been reported to reduce production of inflammatory mediators, and because it is small it may be taken up directly by cells, including cells lining the gut. Much of the attention has focused on intestinal inflammation models.

It is important to be clear about the evidence: most of what is known comes from cell-culture and animal studies, not from rigorous human trials. KPV is sold and discussed as a research compound and is not an approved medication, and claims about treating specific human diseases outrun the published data. Its safety profile in humans is not well characterized.