Thymalin (20mg)
Thymalin is a thymus peptide extract, developed by Khavinson. Reconstitute with 2mL of bacteriostatic water for 10mg/mL. Pharmaceutically approved in Russia.
Reviewed by the AllPeptides.eu Editorial Team·Last reviewed: 2026-06-16
Educational information. Not medical advice, and no efficacy claim is implied. Regulatory approval is not a use recommendation by AllPeptides.eu.
⚠️ For informational/educational purposes only. Not medical advice. We do not sell any products. Self-treatment carries serious risks — consult a healthcare professional. Disclaimer
How It Works
Thymalin regulates T-lymphocyte differentiation, enhances phagocytosis, increases NK cells, and improves neuroendocrine balance through thymic regeneration.
Quick Start
- Typical Dose: 5–10mg subcutaneously
- Frequency: 1x/day × 10 days
- Storage: 2–8°C after reconstitution
Dosing Table — Thymalin 20mg
Route: Subcutaneous injection | Frequency: 1x daily
| Week | Dose | Units (per injection) |
|---|---|---|
| 1–10 days | 5mg | 50 Units (0.50 mL) |
| 1–10 days | 10mg | 100 Units (1.00 mL) |
| Maintenance | 5mg | 50 Units (0.50 mL) |
Classic Khavinson protocol: 10-day cycle, 2x/year. For long-term immunostimulation.
Related compounds
Reconstitution Steps
- Clean the stoppers with an alcohol wipe.
- Draw up 2mL of bacteriostatic water.
- Slowly inject against the side of the vial wall.
- Gently swirl until fully dissolved.
- Store in the refrigerator (2–8°C).
Protocol Overview
- Thymalin is a bovine thymus gland extract, developed by Prof. Khavinson.
- Approved in Russia as a pharmaceutical immunostimulant.
- In Khavinson's studies, it was associated with increased longevity.
Dosing Protocol
- 10-day cycle: 5–10mg/day subcutaneously.
- Repeat 2x/year (e.g., autumn/spring).
- Maintenance: 5mg, 3x/week.
- Combined with Epithalon for an anti-aging protocol.
- Break between cycles: After the cycle (5–10 days), a washout period of 3–6 months is recommended. Thymalin regulates the immune system via the thymus — typically 2 cycles/year.
Washout & Cycle Restart
When can I restart?
After the cycle (5–10 days), a washout period of 3–6 months is recommended. Thymalin regulates the immune system via the thymus — typically 2 cycles/year.
Minimum wait period: 12 weeks
Storage Instructions
- Reconstituted: 2–8°C, use within 20 days.
- Powder: 2–8°C.
Important Notes
- Very well tolerated over decades of clinical use.
- Khavinson's studies show a reduction in mortality in the elderly.
- Use with caution in autoimmune diseases.
Potential Benefits & Side Effects
Potential Benefits:
- T-lymphocyte immunostimulation
- Anti-aging effects (Khavinson studies)
- Endocrine system regulation
- Thymic regeneration
- Improved immune response
Potential Side Effects:
- Slight redness at the injection site (rare)
- Very rare: allergic reaction
- Generally extremely safe
⚠️ Serious Warnings & Long-Term Risks
The following warnings are based on published literature, FDA labels, and post-marketing surveillance. They do not constitute medical advice. Consult a healthcare professional.
Immunostimulation — caution in autoimmune conditions
As a thymic extract, Thymalin activates T-cells. Contraindicated in autoimmune diseases. Long-term data only from Russian studies.
📄 Bull Exp Biol Med 2003References
- Thymalin Longevity — Khavinson VK, et al. Peptide regulation of aging: 35-year research experience. Bull Exp Biol Med. 2011;152(1):11-15.
View Source - Thymic Peptides Immunity — Khavinson VK. Peptides and ageing. Neuroendocrinol Lett. 2002;23(suppl 3):11-144.
View Source
Recommended Supplements
Vitamin C (High-dose)
Zinc + Selenium
External Sources & Regulatory Status
Regulatory Approvals
Тималин® · Immunostimulation / Thymic function (1982)
Approved in Russia (1982)
Educational information. Not medical advice, and no efficacy claim is implied. Regulatory approval is not a use recommendation by AllPeptides.eu.
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