Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Kisspeptin-10 | Melanotan II | |
|---|---|---|
| Category | Peptides | Peptides |
| Standard Dose | Research indicates 1-10 mcg/kg via subcutaneous injection or IV bolus for acute HPG axis stimulation. | Research indicates 250-500 mcg daily via subcutaneous injection during loading, reducing to 250 mcg 2-3 times weekly for maintenance. |
| Timing | Morning dosing preferred for testosterone optimization. Can be used acutely before sexual activity. | Administer 4-6 hours before UV exposure for optimal tanning synergy. Can be taken at any time of day. |
| Cycle Duration | Short-term use only. Continuous kisspeptin administration may cause tachyphylaxis (desensitization) of the HPG axis. | Loading phase 1-2 weeks, then maintenance as long as desired. Pigmentation fades gradually upon discontinuation. |
| Evidence Level | moderate_human | moderate_human |
Kisspeptin-10 is the 10-amino acid C-terminal fragment of the kisspeptin family that signals directly to GnRH neurons through the kisspeptin receptor (KISS1R/GPR54), triggering GnRH release into the portal circulation. This stimulates LH and FSH secretion from anterior pituitary gonadotrophs. In men, intravenous kisspeptin-10 produces rapid dose-dependent LH rises (4.1 to 12.4 IU/L at 1 mcg/kg within 30 minutes), increases LH pulse frequency and amplitude, and subsequently elevates testosterone through the HPG axis.
Research indicates 1-10 mcg/kg via subcutaneous injection or IV bolus for acute HPG axis stimulation.
Morning dosing preferred for testosterone optimization. Can be used acutely before sexual activity.
Short-term use only. Continuous kisspeptin administration may cause tachyphylaxis (desensitization) of the HPG axis.
Melanotan II is a synthetic cyclic analog of alpha-melanocyte-stimulating hormone (alpha-MSH) that non-selectively agonizes melanocortin receptors MC1, MC3, MC4, and MC5. MC1R activation stimulates eumelanin synthesis through tyrosinase upregulation, producing tanning. MC3R activation in the CNS increases libido and produces erectile responses. MC4R activation suppresses appetite. The cyclic structure provides enhanced in vivo stability (half-life 1-2 hours) and increased blood-brain barrier permeability compared to linear alpha-MSH.
Research indicates 250-500 mcg daily via subcutaneous injection during loading, reducing to 250 mcg 2-3 times weekly for maintenance.
Administer 4-6 hours before UV exposure for optimal tanning synergy. Can be taken at any time of day.
Loading phase 1-2 weeks, then maintenance as long as desired. Pigmentation fades gradually upon discontinuation.
Take our free assessment to get personalized recommendations based on your health goals, current stack, and biomarkers.
Get Your Free Protocol →or take the assessment →