Thymosin Peptides: Alpha-1, Beta-4 and TB-500 Compared
Thymosin peptides explained: thymosin alpha-1, thymosin beta-4 and TB-500 — different molecules, evidence and user reports. Not medical advice.
Anonymous user report. Not medical advice. Peptides discussed are not FDA-approved for the uses described. Editorial process →
Short answer
"Thymosin" names several unrelated peptides first isolated from thymus tissue. Thymosin alpha-1 (thymalfasin) is an immune-modulating peptide approved in some countries for conditions such as hepatitis B. Thymosin beta-4 is an actin-binding protein studied in tissue repair. TB-500 is a synthetic fragment marketed from beta-4 research and is not approved. Shared names do not mean shared effects. Peptide Confessions does not publish dosing, timing, injection or sourcing guidance.
What users report here
Anonymous accounts are collected on the Thymosin alpha-1 reports. They are personal stories, often with other compounds in the mix, not evidence of effect.
related peptides:
community guides:
More confessions from the archive
Community Q&A
- Are thymosin alpha-1 and beta-4 the same?
- No. Different structures and research areas: immune modulation versus tissue repair.
- Is any thymosin peptide approved?
- Thymalfasin (thymosin alpha-1) is approved in some countries. Beta-4 and TB-500 are not approved medicines.
- Does this page give dosing advice?
- Peptide Confessions does not publish dosing, timing, injection or sourcing guidance.
Anonymous first-hand reports plus sourced context — educational only, not medical advice. Editorial policy & corrections.