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Signs TB-4 Gone Bad Degraded: Comparison by Storage Condition
Peptide degradation rates vary dramatically based on storage environment. The following table compares how different conditions affect TB-4 stability and the timeline for visible or measurable signs of degradation. Lyophilized at −20°C, sealed 24–36 months Min
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This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Peptide degradation rates vary dramatically based on storage environment. The following table compares how different conditions affect TB-4 stability and the timeline for visible or measurable signs of degradation.
- Lyophilized at −20°C, sealed
- 24–36 months
- Minimal. Oxidation if seal breaks
- None if stored correctly; discoloration if moisture enters
- Optimal long-term storage; standard for research facilities
- Lyophilized at 4°C (refrigerator)
- 12–18 months
- Slow hydrolysis, oxidation
- Possible clumping or yellowing after 18+ months
- Acceptable for medium-term storage; not ideal for multi-year protocols
- Lyophilized at 25°C (room temp)
- 2–4 weeks
- Rapid oxidation and aggregation
- Discoloration, clumping, reconstitution failure within weeks
- High risk. Avoid unless using immediately
- Reconstituted at 2–8°C
- 28 days maximum
- Hydrolysis in aqueous solution
- Cloudiness, precipitate formation beyond 28 days
- Standard post-reconstitution protocol; discard after 28 days regardless of appearance
- Reconstituted at 25°C (room temp)
- 3–7 days
- Accelerated hydrolysis
- Cloudiness, loss of clarity, potential microbial growth
- Unacceptable. Reconstituted peptides must be refrigerated
- Exposed to UV light (any temp)
- Degradation begins immediately
- Oxidation of aromatic amino acids
- Yellowing, browning; loss of potency measurable within hours
- Store in amber vials or opaque containers only