Thymosin Alpha 1
Thymosin Alpha 1 (Ta1) is a naturally occurring peptide produced by the thymus gland that plays a crucial role in immune system regulation. It enhances T-cell function, promotes dendritic cell maturation, and modulates cytokine production. Ta1 has been used clinically for decades, particularly in treating chronic hepatitis B and C, and as an immune adjuvant in cancer therapy. It strengthens immune surveillance without causing dangerous immune overstimulation.
Frequency
When sick, 2x per week
Cycle Length
When sick, 4x per year.
Route
Intramuscular
Research Level
Established
Goals
Dosing Protocol
3-8 mg per injection, intramuscularly. Use when sick, 4x per year. With standard reconstitution (10 mg in 1 mL), 3 mg = 30 units and 8 mg = 80 units on a U-100 insulin syringe.
Reconstitution
Typically comes pre-reconstituted. If lyophilized, add 1 mL bacteriostatic water.
Timing
Morning or evening. Consistent timing is more important than specific time.
Get complete, interactive protocols in the PepStack Pro app.
Potential Side Effects
- Injection site redness
- Mild flu-like symptoms initially
- Generally very well tolerated
Important Warnings
- Approved in 35+ countries but not FDA-approved in the US
- Use with caution in organ transplant recipients (may increase rejection risk)
Works Well With
Research References
- Tuthill C, et al. Ann N Y Acad Sci. 2010;1194(1):179-184. doi:10.1111/j.1749-6632.2010.05489.x
- Garaci E, et al. Int J Immunopharmacol. 2000;22(12):1067-1073. doi:10.1016/S0192-0561(00)00070-8
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 Thymosin Alpha 1 and 60+ other peptides.
Connect with a Physician
Work with a board-certified physician who specializes in peptide therapy through MyFlowMD. Get a personalized Thymosin Alpha 1 protocol.
Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. Thymosin Alpha 1 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.