Thymosin beta-4
Thymosin beta-4 and TB-500 are not automatically the same molecule: identity, route, and evidence matter.
At a glance
- Evidence stage
- Early human
- Regulatory status
- Investigational; no FDA-approved systemic or injectable thymosin beta-4 treatment.
- Research context
- Full-length thymosin beta-4 has laboratory, animal, and limited human topical/ophthalmic research. It is not interchangeable with the TB-500 label used for various fragments or products.
What this is
- A naturally occurring 43-amino-acid peptide studied in repair and inflammation research
- A research topic with limited human clinical evidence
What this isn't
- Proof that TB-500 products contain full-length thymosin beta-4
- A validated treatment for injury or wound healing
Key terms
Educational information only — not medical advice. This page does not diagnose a condition, recommend treatment, or replace care from a qualified clinician. The evidence stage and regulatory status below apply to the named molecule and indication, not to every product sold under a similar name.
Thymosin beta-4 is studied in wound repair, cell migration, angiogenesis, and ocular-surface research. Small human trials of topical or ophthalmic formulations provide useful safety and signal-finding information, but they do not establish that an injectable or online product improves recovery.
Evidence limits
How to read the evidence
Educational information only — not medical advice. This page does not diagnose a condition, recommend treatment, or replace care from a qualified clinician. The evidence stage and regulatory status below apply to the named molecule and indication, not to every product sold under a similar name.
A careful review should summarize the small randomized studies, their endpoints and limitations, and the distinction between hypothesis-generating repair biology and proven clinical benefit.
External sources and citations
- Thymosin beta 4 treatment of venous ulcers. Annals of the New York Academy of Sciences, 2010
- Thymosin beta 4 ophthalmic solution for dry eye: randomized phase II trial. Clinical Ophthalmology, 2015
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