Source comparison
Comparison: Melanotan-1 Stability vs Other Common Research Peptides
Melanotan-1 30–45 days Deamidation (asparagine residues) Moderate. Cloudiness visible after 50+ days Poor. Single freeze-thaw reduces potency 20–30% Stable enough for multi-week protocols if refrigeration is consistent; more forgiving than BPC-157 but less sta
This comparison does not assign a generated winner or score.
- Melanotan-1
- 30–45 days
- Deamidation (asparagine residues)
- Moderate. Cloudiness visible after 50+ days
- Poor. Single freeze-thaw reduces potency 20–30%
- Stable enough for multi-week protocols if refrigeration is consistent; more forgiving than BPC-157 but less stable than TB-500
- BPC-157
- 14–21 days
- Oxidation (cysteine and methionine)
- High. Aggregates rapidly above 10°C
- Very poor. Irreversible loss after one cycle
- Shortest viable window of common peptides; requires small-batch reconstitution and strict cold chain
- TB-500 (Thymosin Beta-4)
- 60–90 days
- Slow deamidation
- Low. Highly soluble, aggregates rarely
- Moderate. Tolerates one freeze-thaw with 10–15% loss
- Most stable of common research peptides; suitable for long-duration studies with infrequent dosing
- Sermorelin
- 21–30 days
- Hydrolysis at N-terminus
- Moderate
- Poor. Significant potency loss after thawing
- Mid-range stability; similar handling requirements to melanotan-1 but slightly shorter window
- Ipamorelin
- 30–40 days
- Peptide bond cleavage (acid-catalyzed)
- Poor
- Comparable to melanotan-1; benefits from pH-buffered diluent if available
- The comparison reveals that melanotan-1 sits in the middle of the stability spectrum. Not as fragile as BPC-157, not as robust as TB-500. Its 30–45 day window is achievable under real-world conditions if storage discipline is maintained, but it will not tolerate the same degree of handling variability that TB-500 does.