Topic

What is kisspeptin?

Kisspeptin is a hormone made in the brain that switches on the reproductive hormone cascade: it triggers the release of GnRH, which in turn drives LH, FSH and the sex hormones. Researchers have studied kisspeptin-10 and kisspeptin-54 in small human trials of fertility and hormone signaling.

These articles cover the science, the studies, and side effects. Kisspeptin is coming soon to Promise — add me to the list. No kisspeptin product is FDA-approved.

12 articles on this topic

  1. A man sits at the end of a lakeside dock with a folded scarf

    Who Discovered Kisspeptin? The People Behind It

    Danny Welch's cancer research started the story in 1996. Other teams found the peptide, connected it to puberty, and brought it into human studies.

    September 20, 2026 · Nadia Okonjo, Health Writer
  2. A woman sits on a sofa in a quiet living room peeling an orange

    Kisspeptin Dose: What Human Studies Actually Used

    There is no standard kisspeptin dose to copy from a study. Human trials used different peptide forms, routes, and schedules, so a prescription has to be set for the person and the clinical goal.

    September 17, 2026 · Nadia Okonjo, Health Writer
  3. A woman sits on a blanket in a meadow beside a basket of apples

    Kisspeptin Supplement: A Capsule Isn't the Peptide

    A capsule sold as a kisspeptin supplement does not deliver the peptide used in the hormone and fertility studies people usually quote. Those studies used a vein or an injection under the skin, not an ordinary pill.

    September 16, 2026 · Julian Reyes, Health Writer
  4. A woman in a sage knit top holds a plain mug in a linen armchair beside a sunlit window

    Kisspeptin vs PT-141: They Work Differently

    Kisspeptin and PT-141 both enter libido conversations, but they act on different systems and do not share the same evidence. PT-141 has larger trials and an approved branded product; kisspeptin's human data are smaller and earlier.

    September 13, 2026 · Nadia Okonjo, Health Writer
  5. A woman sits on the low wooden edge of a raised garden bed, a small pot of seedlings in her lap

    Kisspeptin-54 vs Kisspeptin-10: Why Length Matters

    Kisspeptin-54 is the whole peptide; kisspeptin-10 is its last ten amino acids. The long one lasts about seven times longer in the blood, and that one fact explains which studies used which.

    September 11, 2026 · Nadia Okonjo, Health Writer
  6. A woman in a green cotton shirt and full-length denim trousers sits on the wooden edge of a raised garden bed with a small pot of seedlings in her lap

    Kisspeptin for Women: What the Research Shows

    Kisspeptin has been given to women in a handful of small hospital trials — to mature eggs during IVF, to restart stalled hormone signalling, and once to watch the brain respond to sexual cues. Here is what those studies found, and what they did not.

    September 10, 2026 · Julian Reyes, Health Writer
  7. A man sits in a linen armchair beside a sunlit window, a plain mug held in both hands.

    Kisspeptin and Testosterone: Pattern Beats Amount

    A study published on August 3, 2026 gave 15 healthy men kisspeptin-10 three different ways. Five days of it around the clock and the pituitary stopped answering; eight hours on and sixteen off, and it kept answering for twelve days.

    September 9, 2026 · Nadia Okonjo, Health Writer
  8. A man in a charcoal long-sleeve top and olive trousers walks toward the camera along a dirt path through open grassland

    Kisspeptin Benefits: What Human Studies Found

    In people, kisspeptin has done two things reliably: switched on the reproductive hormone system, and changed how the brain handles sexual cues. Nearly all of it was measured over hours, in a hospital.

    September 8, 2026 · Julian Reyes, Health Writer
  9. A man in a navy henley laces a shoe on a bench beneath a bright window

    Kisspeptin for Men: What the Studies Really Show

    Kisspeptin may affect reproductive hormones and sexual response in men. The evidence is promising but small, and it does not establish a standard dose or long-term treatment plan.

    September 7, 2026 · Priya Raman, Health Writer
  10. A woman in a sage sweater sits by a sunlit window holding a plain ceramic mug

    Kisspeptin Side Effects: What Human Trials Found

    Short human trials suggest few systemic effects, while injection-site stinging can happen and repeated exposure can blunt the hormone response. The major unknown is long-term safety.

    September 6, 2026 · Elena Marsh, Health Writer
  11. A man stands on a sunlit balcony in the early morning holding a mug of coffee

    What Is Kisspeptin-10? The Decapeptide Explained

    Kisspeptin-10 is the last ten amino acids of the full 54-residue peptide — the shortest fragment that still switches on the receptor. It also clears from human blood in about four minutes, which shapes everything about how it is given.

    August 27, 2026 · Julian Reyes, Health Writer
  12. A woman sitting by a sunlit window with both hands around a ceramic cup, eyes closed, calm and unhurried

    What Does Kisspeptin Do? The Signal Above GnRH

    Kisspeptin sits one rung above GnRH in the reproductive axis, and the ~4-minute half-life routinely quoted for kisspeptin-10 — the form coming soon to Promise — has been measured in people: 3.8 minutes in men, 4.1 in women.

    August 12, 2026 · Nadia Okonjo, Health Writer