Overview
Zinc-dependent thymic peptide that matures T-cells.
- Synthetic peptide manufactured to pharmaceutical or research-grade purity
- Subcutaneous injection, sublingual, or oral preparation depending on bioavailability
- Compounded by a licensed pharmacy for clinical use
- Subcutaneous injection
- Oral or sublingual lozenge
- Nasal spray
- Compounded topical
Mechanism of action
Binds zinc to acquire activity; promotes T-cell differentiation in thymus.
- · Binds zinc to acquire activity
- · promotes T-cell differentiation in thymus
Effects on the body
Organ system effects
Thymulin (Reference) modulates innate and adaptive immune responses, including cytokine signaling and barrier function.
Thymulin (Reference) acts on hallmarks of aging including oxidative stress, mitochondrial dysfunction, and senescence signaling.
Evidence-based benefits
Restores T-cell function in zinc-deficient elderly
Limited evidencePotential side effects
- · Not approved as supplement in most regions
Drug interactions
Safety & non-supplemental interactions
Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.
- ·Pregnant or breastfeeding (insufficient safety data)
- ·Children under 18 (unless directed by a clinician)
- ·Autoimmune disease (theoretical immune activation)
- ·Immunosuppressants
- ·Most research peptides are not FDA-approved for human use outside investigational protocols.
Supplement interactions
- Vitamin D3 + K2Foundational immune modulation.
- ZincRequired cofactor for innate and adaptive immune function.
- NAD+ precursor (NMN or NR)Complementary mitochondrial and sirtuin support.
No specific avoidances listed.
Dosing & bioavailability
Where to buy
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Scientific evidence8Show studiesHide studies
Thymulin activity and zinc in elderly
Mocchegiani E, et al.
Zinc-deficient elderly given thymulin.
Activity restored alongside improved CD4/CD8 ratio.
PubMed: Thymulin (Reference) — Restores T-cell function in zinc-deficient elderly
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