Thymulin: Patient Information & Safety Notes
Also known as FTS
Other names: fts, facteur-thymique-srique, serum-thymic-factor
Thymulin is a naturally occurring zinc-dependent nonapeptide produced by the thymus gland. It plays a role in T-cell differentiation and immune regulation. It has also been investigated for hair follicle support and wound healing. It is not FDA-approved for any indication.
In plain language
What Thymulin is used for
- Investigated in research settings for immune regulation, anti-aging, and hair follicle support
Taking this medicine
How it is administered
- Subcutaneous injection
Read before you decide
Risks and precautions
Risks and warnings
- Injection site irritation (expected with any injection)
- Human safety profile not systematically established in large clinical trials
- Immune stimulation may theoretically worsen autoimmune conditions
Who should not take it
- Active autoimmune flare (immune stimulation may exacerbate condition)
- History of organ transplant (immune stimulation may risk rejection)
- Pregnancy (insufficient safety data)
Common questions
Patient questions
Is thymulin FDA-approved for any indication?
No. Thymulin is not FDA-approved for any indication in the United States. It is a research compound. Its safety and efficacy in humans have not been established in large peer-reviewed clinical trials. Individuals interested in immune support or hair loss treatment should discuss evidence-based options with a licensed provider.
Is thymulin safe to inject?
There are no large-scale human safety studies on injectable thymulin. The FDA has not reviewed it for safety or efficacy. Compounded peptide preparations carry risks that are not monitored through FDA approval processes. See FDA guidance on compounded drug risks.
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This information is educational — not medical advice.
This page is provided for general educational purposes and summarizes publicly available data from sources such as the U.S. Food & Drug Administration. It is not a substitute for the judgment of a licensed clinician and should not be used to start, stop, or change any medication. It may be incomplete or out of date, and individual circumstances vary. Always talk with your prescriber or pharmacist about your specific medications and health conditions. If you think you may have a medical emergency, call 911.
Sources & References
Learn more about where our data comes from and how we write and review medical content.