Thymalin
Research profile · How we handle evidence
Thymic polypeptide that regulates T-cell function and supports immune system restoration.
Evidence Score
High confidence
Category
Therapeutic area
Standard Dose
Daily
Half-life
Plasma elimination
Route
Subcutaneous or Intramuscular
Safety Tier
Well characterized
Overview
Thymalin is one of the original thymus-derived bioregulator peptides from the Khavinson research group. As you age, your thymus gland shrinks and your immune system becomes less effective, Thymalin helps restore thymus function and T-cell production to more youthful levels. It's typically used in 5-10 day courses, often alongside Epitalon for a combined longevity + immune restoration protocol. The effects are gradual and cumulative rather than dramatic overnight changes, but the logic is sound: maintaining immune competence as you age is one of the most important things you can do for healthspan. If you're doing an annual 'longevity tune-up' protocol, Thymalin is a staple in many people's stacks.
Mechanism of Action
Thymalin restores thymus function and T-cell production, think of it as an immune system tune-up for aging or post-illness recovery. Thymosin Alpha-1 is more targeted toward antiviral immunity, while Thymulin requires zinc as a cofactor. Epithalon is the anti-aging peptide from the same research lineage but operates through telomerase rather than immune pathways.
Benefits
- Immune regulation
- T-cell support
- Thymus function
- Immune restoration
Side Effects
- Generally well-tolerated
- Mild injection site reactions
Contraindications
- Pregnant or breastfeeding women
- Autoimmune conditions
Structure & Sequence
Verified structure
Thymalin
Illustration uses the catalog amino acid sequence because no exact external registry match was confirmed.
- Amino Acid Sequence
- Polypeptide complex from thymus; key dipeptides: EW (Glu-Trp), KE (Lys-Glu), EDP (Glu-Asp-Pro)
- Molecular Weight
- ~1,000–10,000 Da (heterogeneous mixture)
- Chemical Formula
- Heterogeneous (polypeptide complex, MW <10 kDa)
- CAS Number
- Polypeptide complex (no single CAS)
Stack & Route Context
Stacks with
- Thymosin Alpha-1
- Thymulin
- Vilon
Administration
Subcutaneous or Intramuscular
Research Status
Used clinically in some countries
Approval Status
Phase3
Sports Legal
Permitted
References
- 1View source
Thymalin and immune restoration in aging
2022
- 2View source
Thymic peptides: immunomodulation and clinical applications
2020
This profile summarizes research literature for education only. It is not medical advice, and it does not diagnose, treat, or recommend a dose. Consult a qualified professional before changing a protocol.