Kisspeptin-10 is the shortest biologically active fragment of the naturally occurring kisspeptin peptide family. It is derived from the KISS1 gene and acts as one of the body’s most important regulators of reproductive hormone signaling. Scientists consider kisspeptin the “master switch” of the hypothalamic-pituitary-gonadal (HPG) axis because it stimulates the release of Gonadotropin-Releasing Hormone (GnRH),