Kisspeptin

Kisspeptin (commonly Kisspeptin-10) is a hypothalamic neuropeptide encoded by the KISS1 gene. It is the master upstream regulator of the hypothalamic-pituitary-gonadal (HPG) axis, signaling through the GPR54 (KISS1R) receptor on GnRH neurons.

Kisspeptin is the conductor of the reproductive hormone orchestra. It tells GnRH to fire, which tells the pituitary to release LH and FSH, which tells the gonads to make testosterone or estrogen. Without it, the whole HPG axis goes quiet.

Binds GPR54 on GnRH neurons in the hypothalamus, triggering pulsatile GnRH release. This drives downstream LH and FSH secretion from the pituitary, which in turn stimulates gonadal steroidogenesis. Kisspeptin is upstream of every other reproductive hormone signal.

• •HPG axis activation studies
• •Hypogonadotropic hypogonadism research
• •Reproductive hormone profiling
• •Fertility research models
• •Comparison with Gonadorelin and HCG

Gaining attention in TRT-restart and post-cycle therapy communities as a more 'physiologic' alternative to HCG. Discussions note that it stimulates the entire axis upstream rather than mimicking LH at the testicular level.

“The conductor of the reproductive orchestra.”

Compared head-to-head with Gonadorelin (direct GnRH analog) and HCG (LH mimetic). Sometimes discussed in HPG-restart research stacks.

Kisspeptin (KP-10) is the upstream master regulator of the HPG axis, studied for natural GnRH/LH/FSH activation and reproductive hormone research.