Thymalin
Thymalin is a natural peptide complex extracted from the thymus gland. It was developed by the renowned Russian gerontologist Professor Vladimir Khavinson as part of his bioregulator peptide research. Thymalin normalizes thymic function, restores T-cell populations, and modulates immune responses. In landmark studies, Thymalin combined with Epithalon was shown to reduce mortality by nearly 50% in elderly patients over a 12-year period. It is one of the most studied bioregulator peptides for immune aging and longevity.
Frequency
Once daily during a course
Cycle Length
10-day courses, repeat every 3-6 months. Can alternate with Epithalon courses.
Route
Subcutaneous
Research Level
Emerging
Goals
Dosing Protocol
1-10 mg daily for 10 days, subcutaneously or intramuscularly. With standard reconstitution (20 mg in 1 mL), 1 mg = 5 units and 10 mg = 50 units on a U-100 insulin syringe.
Reconstitution
Add 1 mL bacteriostatic water to a 20 mg vial.
Timing
Morning, intramuscular injection.
Get complete, interactive protocols in the PepStack Pro app.
Potential Side Effects
- Injection site soreness
- Mild fatigue during first days
- Very well tolerated in studies
Important Warnings
- Most research is from Russian literature with limited Western peer review
Works Well With
Research References
- Khavinson VK, Morozov VG. Gerontology. 2003;49(5):265-269. doi:10.1159/000071710
Not sure which peptides are right for you?
Take our free protocol quiz to get personalized recommendations based on your goals.
Get Full Protocols in the App
Unlock interactive dosing calculators, injection tracking, stacking guides, and lab monitoring for Thymalin and 60+ other peptides.
Connect with a Physician
Work with a board-certified physician who specializes in peptide therapy through MyFlowMD. Get a personalized Thymalin protocol.
Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. Thymalin may be regulated differently in various jurisdictions. Always consult with a qualified healthcare provider before beginning any peptide protocol. PepStack Pro does not sell peptides or provide medical advice. Content reviewed by Dr. Seth Miller, MD.