KPV is a tripeptide (i.e. 3 amino acids long) that makes up the C-terminal end of a larger naturally occurring melanocortin peptide hormone in your body known as alpha-melanocyte-stimulating hormone (ฮฑ-MSH).
Great sources for readingย
https://pubmed.ncbi.nlm.nih.gov/6333677/
https://academic.oup.com/ibdjournal/article/14/3/324/4653598?login=false