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Melanotan I

Protocol

For protocol designers building Melanotan I into a multi-compound regimen, the practical questions are pharmacokinetic compatibility, route compatibility, receptor non-overlap, and operational scheduling around real-world constraints (travel, meals, training). The 0.5-1 mg 1x daily during loading; less frequent maintenance dose at ~2-30 days (implant); ~30 min SubQ half-life informs which scheduling pattern fits.

Protocol / Scheduling / Cycling Applications
Wash-OutProtocol CalendarDaily TimingTravel ConsiderationsLoading Phase
Category
α-MSH analogue (long-acting)
Standard Dose
0.5-1 mg
Frequency
1x daily during loading; less frequent maintenance
Route
SubQ · Implant (approved formulation)

Key Takeaways

  • Scheduling lens: Melanotan I's ~2-30 days (implant); ~30 min SubQ half-life via subq/implant (approved formulation) places it in the multi-daily-dosing bucket.
  • Mechanism: Selective melanocortin-1 receptor (MC1R) agonist.
  • Cycle structure: 8-12 weeks on, 4 weeks off; the off-period is functionally required for receptor reset.
  • Stack scheduling: add one compound at a time with 2 weeks of isolated dosing before layering.
  • Schedule-compatible stack partners: BPC-157, TB-500, Ipamorelin.

Protocol / Scheduling / Cycling Mechanism

Selective melanocortin-1 receptor (MC1R) agonist. Increases eumelanin production in melanocytes. Provides photoprotection. Lacks the MC4R-mediated central effects (libido, appetite, sexual response) of Melanotan II. Schedule design for Melanotan I starts from the pharmacokinetic constraints implied by this mechanism and the published half-life. The subsections below address daily and weekly timing, cycle length and off-period planning, stack scheduling with other compounds, and travel-and-continuity considerations.

Daily and weekly timing

Melanotan I with a ~2-30 days (implant); ~30 min SubQ half-life pharmacokinetic profile sits in the weekly-dosing-friendly bucket. The schedule is best built around either 1x daily during loading; less frequent maintenance, with consistency mattering more than the absolute clock time of any single dose.

Stack scheduling with other compounds

When Melanotan I is part of a multi-compound stack, the scheduling question becomes how to time its dose relative to the others. Multiple subcutaneous compounds can be combined in a single injection where compatible, or staggered through the day where pharmacokinetics differ meaningfully. The pragmatic schedule reflects both pharmacokinetic constraints and the user's operational reality.

Cycle length and off-cycle planning

Standard Melanotan I cycle length is 8–12 weeks for most users, with off-cycle periods of 4–6 weeks calibrated to allow receptor sensitivity to recover and any cumulative downregulation to resolve. The off-cycle is not optional in well-designed protocols; it is the period during which the dose response is reset for the next cycle.

Protocol / Scheduling / Cycling Applications

Daily Timing

Schedule design for Melanotan I in daily timing starts from pharmacokinetic constraints: less frequent dosing for long half-life compounds. The cycle length and off-period are then layered on top of the daily schedule.

Stack Scheduling

The most-asked scheduling question for Melanotan I in stack scheduling is when to time doses relative to meals and training. The general principle: fasted dosing for compounds engaging the GH axis or AMPK; meal-paired dosing for incretins; flexibility for compounds whose pharmacokinetics permit it.

Wash-Out

For wash-out scheduling, Melanotan I is best run in 8–12 week cycles with 4 week off-periods. Daily timing within the cycle is calibrated to pharmacokinetics; weekly timing is calibrated to training and lifestyle constraints. The schedule is the protocol.

Loading Phase

Schedule design for Melanotan I in loading phase starts from pharmacokinetic constraints: less frequent dosing for long half-life compounds. The cycle length and off-period are then layered on top of the daily schedule.

Dosing Protocol

Goal Route Dose Cycle
Standard protocolSubQ0.5-1 mg8–12 weeks on / 4 weeks off
Conservative starterSubQ1.5-1 mg4–6 weeks initial cycle
Protocol focusSubQ0.5-1 mg1x daily during loading; less frequent maintenance
Maintenance phaseSubQ1.5-1 mgOngoing with periodic pauses

Dose timing for Melanotan I is important relative to food and training given the short half-life. Consistency through the cycle is more important than the precise clock time of individual doses.

Stacking

Melanotan I stacks well with compounds on complementary pathways. The pairings below are the conventional combinations from protocol designers.

  • Melanotan I + BPC-157: Upregulates VEGFR2 to promote angiogenesis and activates the FAK-paxillin pathway for accelerated tissue repair. Pairs naturally with Melanotan I's mechanism in protocol / scheduling / cycling protocols.
  • Melanotan I + TB-500: Binds G-actin monomers and prevents their incorporation into F-actin filaments, regulating the cellular actin pool. Pairs naturally with Melanotan I's mechanism in protocol / scheduling / cycling protocols.
  • Melanotan I + Ipamorelin: Highly selective GHSR1a agonist. Pairs naturally with Melanotan I's mechanism in protocol / scheduling / cycling protocols.
  • Melanotan I + CJC-1295 without DAC (Mod GRF 1-29): Same GHRH-receptor agonism as DAC variant. Pairs naturally with Melanotan I's mechanism in protocol / scheduling / cycling protocols.

Safety & Regulatory Status

WADA: Not on prohibited list FDA: Approved (Scenesse implant for EPP) Research: Phase III in EPP; off-label tanning use

Hyperpigmentation (intended). Nausea on initial doses. Watch for new/changing moles. Avoid in personal/family melanoma history.

Lens-specific safety considerations for protocol / scheduling / cycling use of Melanotan I: Hyperpigmentation (intended). Nausea on initial doses. Watch for new/changing moles. Avoid in personal/family melanoma history. Additional protocol / scheduling / cycling monitoring at baseline and 6–8 week follow-up is appropriate.

Clinical Evidence

Melanotan I vs Related Peptides

Compound Profile Onset Best For
Melanotan Iα-MSH analogue (long-acting)~2-30 days (implant); ~30 min SubQProtocol
BPC-157Stable gastric pentadecapeptide~4 hr (oral)Accelerated tendon, ligament, and gut tissue repair via VEGFR2-driven angiogenesis and FAK-paxillin signalling
TB-500Synthetic thymosin β4 fragment~2-3 daysA 17-amino-acid synthetic fragment of thymosin β4 with actin-sequestering activity — drives cell migration, tissue repair, and broad regenerative effects
IpamorelinSelective GHRP / ghrelin mimetic~2 hrThe most selective ghrelin-receptor agonist among the GHRPs — stimulates GH release with minimal effect on cortisol, prolactin, or appetite
GHK-CuTripeptide-copper complex~30 min plasmaA naturally occurring tripeptide-copper complex that declines with age and is studied for its broad effects on wound healing, skin remodelling, and gene expression

Frequently Asked Questions

Cycle length and off-cycle period?
Standard cycle for Melanotan I is 8–12 weeks on, 4 weeks off. Longer cycles produce diminishing returns and increased downregulation risk; shorter cycles undershoot the response window. The 4-week off-period is functionally required for receptor reset rather than optional.
What if I miss a dose?
Single missed doses are not consequential for most peptide schedules. Resume the next scheduled dose; do not double-dose. Multiple consecutive missed doses (3+) effectively start an off-period and warrant re-evaluating cycle progress before resuming.
Best practice for re-cycling?
Run baseline labs before each cycle. Compare to prior cycle. Adjust dose downward if response is maintained; adjust upward only if response is incomplete and labs support the safety margin. Long-term cycle records inform protocol drift over years.
Daily timing for Melanotan I?
Pragmatic timing depends on pharmacokinetics: multi-daily dosing for short half-life. Consistent timing matters more than the absolute clock time of any single dose.
What is the mechanism of action of Melanotan I?
Selective melanocortin-1 receptor (MC1R) agonist. Increases eumelanin production in melanocytes. Provides photoprotection. Lacks the MC4R-mediated central effects (libido, appetite, sexual response) of Melanotan II. For scheduling and cycle applications specifically, the relevant downstream consequence is the cascade from receptor engagement to systemic effect: Selective melanocortin-1 receptor (MC1R) agonist. The protocol / scheduling / cycling interpretation focuses on the pathway-level detail rather than on any single high-level summary.
What is Melanotan I?
Melanotan I (also known as Afamelanotide / Scenesse) is a 13-residue α-msh analogue (long-acting) with a molecular weight of 1646 Da and a plasma half-life of ~2-30 days (implant); ~30 min SubQ. Selective melanocortin-1 receptor (MC1R) agonist. Increases eumelanin production in melanocytes. Provides photoprotection. Lacks the MC4R-mediated central effects (libido, appetite, sexual response) of Melanotan II. The compound is studied primarily in the protocol / scheduling / cycling domain for the applications outlined above.
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Quick Facts

Molecular weight
1646 Da
Sequence length
13 aa
Half-life
~2-30 days (implant); ~30 min SubQ
WADA
Not on prohibited list
FDA
Approved (Scenesse implant for EPP)
Research
Phase III in EPP; off-label tanning use
Research Note

All protocol / scheduling / cycling applications described on this page are derived from preclinical research, animal models, and limited human case data. None of these uses are FDA-approved indications for Melanotan I unless otherwise noted. Always work with a physician familiar with peptide therapeutics before beginning a protocol.

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