Kisspeptin-10 is the 10-amino acid C-terminal bioactive fragment of kisspeptin — a family of neuropeptides encoded by the KISS1 gene and identified as the critical upstream regulator of the hypothalamic-pituitary-gonadal (HPG) axis. The name originated in Hershey, Pennsylvania — a nod to the city's famous chocolate.

The kisspeptin family's essential role in human reproduction was established in a landmark 2003 *New England Journal of Medicine* paper (Seminara et al.) showing that loss-of-function mutations in the kisspeptin receptor cause complete failure of puberty and reproductive function in humans. Active clinical programs at Harvard/MGH, Imperial College London, and leading fertility centers have since produced human RCT data for kisspeptin in IVF and reproductive medicine contexts.

Kisspeptin-10 retains full receptor binding activity — equivalent to the longer Kisspeptin-54 in stimulating LH release — in a shorter, more clinically accessible form.