All peptides
Sexual healthEmerging

Kisspeptin-10

Metastin fragment 45-54

An upstream regulator of the reproductive axis studied for libido, fertility and hormone signalling.

How it works

Binds KISS1R on GnRH neurons, stimulating pulsatile GnRH release and downstream LH and FSH secretion — the master switch of the hypothalamic–pituitary–gonadal axis.

Structure: Decapeptide fragment of kisspeptin

Reported benefits

  • Increased LH and testosterone signalling
  • Enhanced limbic response to sexual stimuli in imaging studies
  • Fertility applications under investigation

Practical considerations

  • Continuous exposure can desensitise the receptor — pulsatile use matters
  • Human data comes from small imaging and endocrine studies
  • Not a testosterone replacement

Side effects and risks

  • Limited safety data
  • Headache
  • Possible hormonal disruption with chronic use

Dosing overview

Research doses vary; community use is typically low-microgram and infrequent

This describes doses reported in published literature and community protocols. It is not a recommendation, and it is not a substitute for clinical supervision.

Research references

  • Comninos et al., 2017 — Kisspeptin modulates sexual and emotional brain processing