What Melanotan I is
Melanotan I is a linear analogue of alpha melanocyte stimulating hormone, selective for the MC1 receptor. That selectivity is the whole difference between it and melanotan II, which is cyclic and acts across the melanocortin receptor family rather than at one of them.
How the pen is supplied
Solution in a sealed 3 ml pen graduated in 300 dial units.
Pen specification
| Class | Selective MC1 receptor agonist |
| Also known as | Afamelanotide, MT-1 |
| Content | 15 mg |
| Fill volume | 3 ml |
| Dial graduation | 0.01 ml per unit |
| Total dial units | 300 |
| Per dial unit | 50 mcg |
| Cost per mg | £3.33 per mg |
Milligrams per dial unit and cost per milligram are calculated from the pen strength, its fill volume and the current live price. Every SerenQ pen is graduated at 0.01 ml per unit.
Verification
Independent HPLC per batch, identifier printed on the pen.
- SerenQ Melanotan-1 15mg Peptide Penout of stock£50
Availability checked 2026-09-04. The product page carries live stock.
Common questions
How does melanotan I differ from melanotan II?
Selectivity and structure. Melanotan I is linear and selective for MC1. Melanotan II is cyclic and non-selective across melanocortin receptors.