Healing Category
Thymulin
THE THYMUS REJUVENATOR
Facteur Thymique Sérum (FTS), Thymic Serum Factor
Thymulin is a natural hormone produced by your thymus gland that declines with age. It's essential for training and maturing your T-cells, the soldiers of your immune system. By supplementing thymulin, you can help restore youthful immune function, reduce excessive inflammation, and support recovery from illness or chemotherapy. It requires zinc to work properly.
Thymulin Evidence Snapshot
How these guides are reviewed- Regulatory status
- Not FDA approved · research use only
- Dosing guidance
- Reviewed by our clinical team
- Linked evidence
- 2 research sources
- Content updated
- Sep 15, 2026
Dose and schedule recommendations shown below come from The Peptide App Clinical Team. Research links are provided so readers can inspect the supporting evidence directly. Review the sources.
Quick Answers About Thymulin
Is Thymulin FDA approved?
No. This profile records Thymulin as not FDA approved and for research use only.
More context
Review the regulatory and source details on this page for the current context.
What dose does The Peptide App Clinical Team recommend for Thymulin?
Dose: No established SubQ regimen..
More context
Cycle: No established SubQ dosing cycle.. This is clinical-team guidance for reference and does not replace individualized instructions from a licensed clinician.
What research supports this Thymulin guide?
This guide links to 2 curated or current research sources.
More context
Open the research section to inspect the source titles, publication details, study types, and available abstracts directly.
Review the Thymulin research sourcesStudied Effects & Mechanisms
T-Cell Development
Promotes CD3, CD4, and CD8 expression on developing T-cells
Cytokine Balance
Reduces inflammatory cytokines (IL-6, TNF-α) while increasing anti-inflammatory IL-10
Neuroendocrine Connection
Modulates hypothalamic-pituitary axis for balanced stress response
Thymus Preservation
Upregulates FOXN1 and IL-7 signaling to protect against thymic involution
From serum thymic factor to thymulin
The earlier name FTS refers to serum thymic factor. In a 1982 paper, Mireille Dardenne and colleagues distinguished the peptide without zinc from its zinc-bound form and proposed the name thymulin for FTS-Zn. Their chemical work examined a one-to-one metal-to-peptide ratio. This nomenclature describes a peptide-metal complex, not a second peptide sequence.
[Dardenne and colleagues, zinc and serum thymic factor, 1982](https://pubmed.ncbi.nlm.nih.gov/6957870/)
Who is this for
People with declining immune function due to aging · Those recovering from chemotherapy or illness · Anyone with autoimmune inflammation issues · People experiencing chronic infections · Those wanting to delay immune system aging
Further listening
1 recordingResearch-Market Price Snapshot
A compact market signal for this profile. The dedicated pricing page owns vendor, vial-size, and price-per-mg comparisons.
Updated Oct 5, 2026
- Vendors
- 12
- Listings
- 12
- Observed range
- $29–$84
Market evidence
Thymulin product testing and COAs
Current certificates are on file for 2 of 13 vendors tracked in the Thymulin market. Research on this page describes the molecule. Vendor certificates concern particular market samples or batches; they do not change the research evidence or establish clinical safety, sterility, or suitability for use.
Thymulin Research
Live research temporarily unavailable
The live research feed did not return papers for this page. The curated references below remain available for crawlable source context.
Research references
The clinic network
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Compound evidence
Thymulin is well studied in animals but has almost no human evidence
Thymulin has well-documented effects in rodent models but almost no human evidence. The cited human data is one unreplicated 1982 case series in three children.
Compound evidence
Zinc-thymulin hair regrowth rests on one organ-culture study
Zinc activates the body's own thymulin, but zinc-thymulin's hair claim rests on one unreplicated organ-culture study and no controlled human trial.