TB-500 vs Thymosin Beta-4
Research & educational use only. This content is not medical advice. Consult a qualified healthcare professional before using any peptide compound.
TB-500 and Thymosin Beta-4 are both healing regenerative peptides that come up together constantly. This is a side-by-side comparison on the data that actually matters — evidence tier, FDA status, human trials, and how to source each safely — not hype. It is for research and educational purposes only.
TB-500 vs Thymosin Beta-4: side-by-side
| TB-500 | Thymosin Beta-4 | |
|---|---|---|
| Evidence tier | Tier 3 | Tier 2 |
| FDA status | Not FDA Approved | Investigational |
| Human RCTs | 0 | 4 |
| Subjects enrolled | 0 | 400 |
| Animal studies | 40 | 40 |
| Category | healing regenerative | healing regenerative |
| Half-life | Estimated multi-hour half-life in animal models. | Estimated multi-hour half-life. |
| Community logs | 1 | 0 |
Key differences
Thymosin Beta-4 rests on stronger human evidence (Tier 2) than TB-500 (Tier 3) — that means more confidence its observed effects are real rather than artefacts of weaker study designs. Neither is FDA approved for human use — both are not fda approved / investigational and treated as research compounds in the US.
TB-500 has 0 human trials on record (0 subjects) versus Thymosin Beta-4's 4 (400 subjects). Evidence tiers are a shorthand for how strong that human data is — see our guide to understanding peptide evidence tiers for how to weigh them.
What is TB-500?
TB-500 is a synthetic peptide corresponding to the active region of Thymosin Beta-4, a naturally occurring protein involved in actin regulation and cell migration. Animal studies investigate roles in wound healing and tissue repair. It is not FDA-approved and lacks published human randomized controlled trials. It is… Full TB-500 breakdown →
What is Thymosin Beta-4?
Thymosin beta-4 is a naturally occurring 43-amino-acid peptide central to actin regulation, cell migration, and tissue repair. Full-length thymosin beta-4 (distinct from the TB-500 fragment marketed in research-chemical channels) has been evaluated in early human clinical trials for indications such as dry eye and… Full Thymosin Beta-4 breakdown →
Where to buy TB-500 or Thymosin Beta-4 safely
Both are sold by research-chemical suppliers, not pharmacies, so the source matters as much as the compound. Before buying either, vet sellers on third-party lab testing and enforcement history in the ranked directory of trusted peptide sellers — or jump straight to vetted sources for TB-500 or Thymosin Beta-4. PeptidesHub does not sell either compound.
Frequently asked questions
TB-500 and Thymosin Beta-4 are both healing regenerative peptides. Thymosin Beta-4 rests on stronger human evidence (Tier 2) than TB-500 (Tier 3) — that means more confidence its observed effects are real rather than artefacts of weaker study designs. Neither is FDA approved for human use — both are not fda approved / investigational and treated as research compounds in the US. See each compound's full evidence breakdown for the underlying studies.