Thymulin
Also known as Facteur Thymique Serique, FTS
Thymulin is a nonapeptide produced exclusively by the thymus gland, requiring zinc for biological activity. Its production declines sharply with age (up to 90% by age 70), and it plays a critical role in T-cell differentiation and inflammatory pain modulation.
How it works
Zinc-dependent peptide that binds thymulin receptors on T-cell precursors, promoting maturation and differentiation. Inhibits pro-inflammatory cytokines and modulates nociceptive pathways.
Benefits
- Restores T-cell differentiation and immune function
- Significant anti-inflammatory and pain-reducing effects
- Counteracts age-related thymic involution
- Potential neuroprotective effects
- Modulates cytokine production
Dosing
20–100 mcg · Daily or every other day
Very low doses — typically 20–100mcg. Less studied in humans than other thymic peptides.
Ranges reflect commonly cited research protocols, not a prescription. Dose with a licensed provider.
Reconstitution
Typically very small vial sizes given low dosing
Helix’s free reconstitution calculator gives you the exact draw volume → get the app
Common stacks
Reported side effects
- Limited data
- Injection site irritation
Who it’s for
Adults with significant immunosenescence, chronic pain, or inflammatory conditions. Best suited for advanced users with medical supervision.
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