Melanotan II: Half-Life, Tracking & Reference
Tracked in pigmentation-related routines.
| Category | Cosmetic |
|---|---|
| Typical half-life | about 33 hours |
| Essentially cleared in | roughly 6.9 days (~5 half-lives) |
| Common routes | Injection |
Half-life, explained with Melanotan II's numbers
A half-life of about 33 hours means that after that much time, about half of an absorbed amount remains. Each additional half-life halves it again:
| Elapsed time | Estimated amount remaining |
|---|---|
| 1 half-life (33 hours) | 50% remaining |
| 2 half-lives (2.8 days) | 25% remaining |
| 3 half-lives (4.1 days) | 12.5% remaining |
| 4 half-lives (5.5 days) | 6.25% remaining |
| 5 half-lives (6.9 days) | 3.125% remaining |
This is why spacing and consistency matter more than any single dose time, and why short-half-life compounds are often scheduled more frequently than long ones. You can see this curve for your own logged schedule in the levels visualizer or automatically in the app.
What it’s tracked for
- Protocol adherence tracking
- Cycle and timing logging
Reported side effects
- Varies by individual — log what you experience
- Injection-site irritation
Safety notes
User-entered tracking only. Doses, timing, and suitability are provider-directed; this app gives no medical advice.
- Review interactions and conditions with a licensed provider
Often tracked alongside
- Log alongside related routine items to see combined timing
Research context
- Peer-reviewed literature and manufacturer references — verify independently
Frequently asked questions
- What is the half-life of Melanotan II?
- The commonly referenced elimination half-life of Melanotan II is about 33 hours. Half-life is the time it takes for the amount of a compound in the body to fall by half; it is the basis for estimating how levels rise and fall between doses.
- How long does Melanotan II stay in your system?
- As a rule of thumb, a compound is considered essentially cleared after about five half-lives. For Melanotan II, with a half-life of about 33 hours, that works out to roughly 6.9 days. Individual factors like metabolism, dose, and route of administration all shift this, so treat it as an estimate, not a measurement.
- How is Melanotan II administered?
- Melanotan II is most commonly tracked with these routes: Injection. Route affects how quickly a compound is absorbed and how long it acts; your provider determines what is appropriate for you.
- What do people track Melanotan II for?
- Tracked in pigmentation-related routines. PeptideWiz is a tracking tool: it records what you and your provider have decided, and does not recommend any compound or dose.
Not medical advice. This page is an educational reference
for people who track provider-directed protocols. It does not recommend Melanotan II or any
dose, and half-life figures are commonly cited estimates that vary between individuals and
formulations. Always work with a licensed medical provider.