How long does reconstituted TB-500 last?
Reconstituted TB-500 in bacteriostatic water is typically referenced to a 28-day in-use stability window when stored refrigerated at 2-8 °C. The framework follows the same antimicrobial-preservative and peptide-chemical-stability logic that applies across the catalog’s lyophilised peptides.
What the research literature says
TB-500’s post-reconstitution stability tracks the same framework as the other catalog peptides reconstituted with bacteriostatic water: the preservative profile underwrites the antimicrobial protection across multi-week multi-dose draw, and the lyophilisation-stability literature (PMID 10967427, PMID 15032301) consolidates the peptide-chemical-degradation framework that determines the chemical-stability ceiling.
TB-500’s specific stability profile in solution is relatively robust given its acetylated N-terminus (which reduces N-terminal degradation pathways) and the absence of internal methionine or cysteine residues highly prone to oxidation. The compound’s published research base spans cardiac repair (PMID 15565145), dermal healing (PMID 27450738), and limb-ischemia angiogenesis (PMID 32945357) — protocols across this literature have used reconstituted TB-500 across multi-week experimental runs without published reports of mid-experiment activity loss at refrigerated storage.
Extended-stability practice for protocols spanning months uses the aliquot-and-freeze strategy: dispense the reconstituted stock into single-use aliquot tubes at reconstitution, freeze at -20 °C or -80 °C, thaw one aliquot per session. The standard protocol is documented in the peptide storage guide.
Why this matters in research context
Most TB-500 research protocols span 4-12 weeks, which exceeds the 28-day refrigerated in-use window. The aliquot-and-freeze approach is the standard pick for these protocols — it preserves single-batch consistency across the full experimental run and removes the need for mid-experiment re-reconstitution from fresh vials. The compound’s structural robustness makes it relatively tolerant of the aliquoting workflow’s freeze-thaw stress.
Related compounds
- TB-500 10mg — the compound covered by this answer
- Wolverine Stack (BPC-157 + TB-500 blend) — combined-formulation; same stability framework
Related research questions
- What is the half-life of TB-500?
- How do you store lyophilized peptides?
- Can you freeze reconstituted peptides?
References
- Wang W. Lyophilization and development of solid protein pharmaceuticals. Int J Pharm 2000;203(1-2):1-60. [PMID 10967427]
- Tang X, Pikal MJ. Design of freeze-drying processes for pharmaceuticals: practical advice. Pharm Res 2004;21(2):191-200. [PMID 15032301]
- Bock-Marquette I et al. Thymosin beta4 activates integrin-linked kinase and promotes cardiac cell migration, survival and cardiac repair. Nature 2004;432(7016):466-472. [PMID 15565145]
Research-questions pages describe research-context use of peptide-research terminology. They do not constitute medical, veterinary, or clinical advice. TB-500 is sold strictly as a research-grade reagent for laboratory and bench research applications.