Source comparison
Comparison: Melanotan-1 Storage vs Other Peptides
Melanotan-1 −20°C 2–8°C 30–40% loss/week 28 days Moderately stable. Requires strict cold chain but tolerates brief handling at room temp during reconstitution Melanotan-2 35–45% loss/week 21–28 days Slightly less stable than MT-1 due to additional amino acid t
This comparison does not assign a generated winner or score.
- Melanotan-1
- −20°C
- 2–8°C
- 30–40% loss/week
- 28 days
- Moderately stable. Requires strict cold chain but tolerates brief handling at room temp during reconstitution
- Melanotan-2
- 35–45% loss/week
- 21–28 days
- Slightly less stable than MT-1 due to additional amino acid that increases oxidation susceptibility
- BPC-157
- 20–30% loss/week
- 30–45 days
- More stable than melanotans. Acetate salt formulation resists oxidation better than most peptides
- Semaglutide
- 2–8°C (pre-filled pen)
- 15–20% loss/week
- 28 days (opened pen)
- High stability due to fatty acid conjugation that protects peptide backbone from degradation
- Tirzepatide
- 18–25% loss/week
- Similar stability to semaglutide. Dual agonist structure slightly more prone to aggregation
- Thymosin Beta-4
- 25–35% loss/week
- 30 days
- Moderate stability. Linear structure without disulfide bonds makes it less prone to conformational collapse
- Melanotan-1 sits in the middle range for peptide stability. It's not as fragile as short linear peptides like PT-141 (which degrades rapidly even under refrigeration), but it's not as robust as fatty-acid-conjugated peptides like semaglutide. The cyclic structure provides some protection against enzymatic degradation, but the disulfide bond is a vulnerability. Any condition that promotes disulfide reduction or oxidation accelerates degradation.