Claimed effect · Kisspeptin

Does Kisspeptin help with sexual desire and arousal?

C
Grade C — weak human evidence1 crossover RCT (n=32) · effect size: small
Short answerWeak human evidence. 1 crossover RCT (n=32): enough to be interesting, not enough to count on. Where an effect is seen it is a small effect. Same design in 32 men: increased sexual-brain activation and a modest increase in penile tumescence to erotic stimuli. Single infusion; no data on repeated use.

What the studies show

Same design in 32 men: increased sexual-brain activation and a modest increase in penile tumescence to erotic stimuli. Single infusion; no data on repeated use.

“On viewing sexual videos, kisspeptin significantly modulated brain activity in key structures of the sexual-processing network on whole-brain analysis compared with placebo (mean absolute change [Cohen d] = 0.81 [95% CI, 0.41-1.21]; P = .003).”

Verbatim, from the abstractMills EG, et al. Effects of kisspeptin on sexual brain processing and penile tumescence in men with hypoactive sexual desire disorder: a randomized clinical trial. JAMA Netw Open, 2023; DOI 10.1001/jamanetworkopen.2022.54313

A few small or poorly-controlled human studies. Enough to be interesting; not enough to count on. Most of what gets called “clinically proven” online lives here.

  1. 1

In context

Kisspeptin is the hormone that switches on the reproductive axis: it makes the hypothalamus release GnRH, which drives LH, FSH and the sex hormones. In people it reliably raises LH within minutes, has been used as an egg-maturation trigger in IVF in phase 2 trials, and in two small randomised crossover trials at Imperial College London (32 women, 32 men) increased sexual-brain activation and reduced sexual aversion in people with low sexual desire. All of that is research-scale. It is not an approved medicine anywhere and is prohibited for male athletes.

Kisspeptin is not approved. Legal status differs by country — see the regulation section or the jurisdiction pages.

Questions

Is Kisspeptin proven to help with sexual desire and arousal?
No. The human evidence is weak (1 crossover RCT (n=32)); LYO grades it C.
What studies are behind the grade?
Same design in 32 men: increased sexual-brain activation and a modest increase in penile tumescence to erotic stimuli. Single infusion; no data on repeated use.
Is Kisspeptin approved for this?
No. Kisspeptin is not approved; it is not an approved medicine for any indication in the jurisdictions LYO covers.

Other outcomes for Kisspeptin

Written and maintained by LYO Research — how pages are written and checked. Reviewed 3 September 2026. Grades count human evidence only; see how LYO grades. Not medical advice. Correct this page →