Peptide library / Immune & defense / Thymopentin
Thymopentin
A five amino acid fragment of thymopoietin used as an immune modulator in parts of Europe.
Effects studied or claimed
What it is used or promoted for, and where each effect has actually been seen
- Immune deficiencySmall human studies
- Rheumatoid arthritis, adjunctSmall human studies
- Atopic dermatitisSmall human studies
How it is thought to work
Thymopentin mimics the active site of thymopoietin and promotes T cell maturation.
What the evidence shows
Small studies suggest modest immune effects. Large, high-quality trials are lacking.
Safety and unknowns
Mild injection site reactions and rare allergic responses.
Regulatory status
Approved in some countries. Not FDA-approved.
Regulatory status changes quickly. This entry was last reviewed on 27 October 2026. Confirm current status with the FDA before relying on it.
More in Immune & defense
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Thymalin
Wellness and performanceA thymus extract developed in the Soviet Union and promoted as an immune bioregulator.
General information, not medical advice. Do not buy or inject unregulated peptides.