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Comparing the cosmetic peptides
Half-life and storage side by side, which is where the practical differences in this group show up.
Reference only. This page covers what the compound is, how it is presented and how it is handled. It does not give dosing protocols or administration schedules, and it is not medical advice.
| Compound | Half-life | Storage |
|---|---|---|
| Glutathione | Short in circulation. | 2-8 C, protected from light. Oxidises on exposure to air. |
| Melanotan I | Shorter than MT2. | 2-8 C, protected from light. |
| Melanotan II | Around 33 hours reported for the cyclic form. | 2-8 C, protected from light. Solutions darken over time. |
Stocked at The PED Shop
Quanta Pharma MT2in stock£15
Quanta Pharma MT2 10mg - Nasal Sprayin stock£20- SerenQ MT2 10mg Peptide Penin stock£35
- SerenQ Glutathione 1500mg Peptide Penout of stock£95
- SerenQ Melanotan-1 15mg Peptide Penout of stock£50
Availability checked 2026-09-08. The product page carries live stock.