TB-500
Synthetic thymosin beta-4 fragment
How researchers describe TB-500
Thymosin-β4 sequesters G-actin and influences actin cytoskeletal dynamics. Preclinical work documents effects on endothelial migration, capillary formation, and macrophage polarization in injury models.
- G-actin sequestration
- Hif-1α / VEGF (angiogenesis)
- Notch / cardiac progenitor
Lyophilized: −20°C. Reconstituted: 2–8°C, used within 30 days per typical literature.
Independent US lab tested
- ✓ Independent US laboratory analysis (HPLC, MS) per lot
- ✓ Reported purity ≥99.0%
- ✓ Lot-traceable COA available on request
- ✓ Sealed glass vial, butyl stopper, crimp cap
- Goldstein et al., 2012 — Thymosin β4 review, Ann NY Acad Sci
- Bock-Marquette et al., 2004 — Tβ4 activates ILK, Nature
What labs are saying
Common researcher questions
Is this for human use?+
No. All X Factor research peptides are RUO — sold solely for in-vitro and non-clinical preclinical research. Not for human or veterinary use, food, supplement, cosmetic, or therapeutic application.
How is purity verified?+
Every lot is analyzed by an independent US laboratory using HPLC (and MS where applicable). COA available per lot — request via contact form.
How is it shipped?+
Lyophilized peptide in a sealed glass vial, packed in discreet outer packaging, shipped from our US fulfillment partner. Blends ship with cold-pack on request.
Can I get a COA before ordering?+
Yes — contact us with the SKU and we will email the most recent lot COA. We also publish the COA vault to verified researchers post-purchase.
Restock for OOS items?+
Use the Notify-Me form on the catalog page. We email when the lot is QC-passed and live. No spam, single-use.