Source comparison
TB-500 Research Speed: Peptide Comparison by Stability Profile
TB-500 −20°C, <5% loss/year 28 days (3–4% loss/week) Methionine oxidation, disulfide bond rearrangement Requires weekly aliquoting for multi-month studies; single freeze-thaw only BPC-157 −20°C, <3% loss/year 21 days (5–6% loss/week) Peptide bond hydrolysis at
This comparison does not assign a generated winner or score.
- TB-500
- −20°C, <5% loss/year
- 28 days (3–4% loss/week)
- Methionine oxidation, disulfide bond rearrangement
- Requires weekly aliquoting for multi-month studies; single freeze-thaw only
- BPC-157
- −20°C, <3% loss/year
- 21 days (5–6% loss/week)
- Peptide bond hydrolysis at N-terminus
- More stable lyophilised, faster degradation once reconstituted
- GHK-Cu
- −20°C, copper dissociation risk
- 14 days (7–9% loss/week)
- Copper ion dissociation from peptide complex
- Shortest usable window; prepare fresh for each administration
- Thymosin Alpha-1
- −20°C, <4% loss/year
- 28 days (2–3% loss/week)
- Minimal oxidative sites; acetylated N-terminus protects
- Most stable once reconstituted; suitable for longer protocols