Thymosin Alpha-1
Thymic peptide that modulates dendritic cells and enhances T-cell function for balanced immune response.
Medically reviewed by Dr. Jonathan Snipes, MD. Last reviewed May 6, 2026.What It Is
Thymosin Alpha-1 is dual-listed here as the primary immune optimization peptide. Approved in over 35 countries for various immune conditions.
How It Works
Enhances dendritic cell and T-cell function, improving your immune system's ability to identify and respond to threats while maintaining balance.
Who It's For
Those seeking immune optimization, recovering from illness, or wanting proactive immune support. See Recovery & Repair for full details.
Who Should Avoid It
Flag for organ transplant recipients and autoimmune flares. Discuss immunosuppressant use.
Protocol & Pricing
OBP Pharmacy Price
$80/15mg
You pay pharmacy price. No markup.
Starting Dose
20 units (0.6mg)
Form
Injectable vial (5mL, 3mg/mL, 15mg total)
Dosing Protocol
20 units subcutaneous injection daily. Maintenance: 2–3 times per week. 20 units = 0.2mL × 3mg/mL = 0.6mg per injection.
Beyond Use Date
90 Days from compounding (USP <797>)
Use within this window from the date your vial is compounded. BUD is set per USP <797> sterile compounding standards and printed on every label.
Stacking Guide
Stacks Well With
Related Peptides
Independently tested
Thymosin Alpha-1 lab test reports
Every Thymosin Alpha-1 batch dispensed by Optimal Balance Pharmacy is independently tested by Eagle Analytical Services (FDA-registered, A2LA ISO 17025 accredited) for sterility (ScanRDI) and bacterial endotoxin (USP <85>). The 2 most recent reports:
| Submission | Lot | Sample | Sterility | Endotoxin | |
|---|---|---|---|---|---|
| ETX-260325-0593 | 032526-13 | Thymosin Alpha-1 3mg/ml (5ml) | Pass | Pass <2 EU/mL / 375 EU/mL | Download |
| ETX-260325-0594 | 032526-23 | Thymosin Alpha-1 3mg/ml (5ml) | Pass | Pass <2 EU/mL / 375 EU/mL | Download |
Eagle Analytical Services is an independent FDA-registered laboratory, A2LA accredited to ISO 17025, based in Houston, Texas. They have no commercial relationship with PeptideRx. PeptideRx prescribes; Optimal Balance Pharmacy compounds and dispenses; Eagle tests every batch. Three separate companies. Browse our full quality program on the quality page.
Common questions about Thymosin Alpha-1
- What is the thymosin alpha-1 immune formulation?
- The thymosin alpha-1 immune formulation is a higher-concentration or alternate-dosing version of thymosin alpha-1 compounded by Optimal Balance Pharmacy for protocols requiring more aggressive immune modulation than the standard formulation. The active ingredient is identical; the formulation differs in concentration to support stronger acute dosing.
- How is the immune formulation different from standard thymosin alpha-1?
- Same active peptide, higher concentration. The immune formulation is typically used for active-illness loading protocols (every-other-day or daily dosing in week 1), where the standard formulation would require larger injection volumes. Your provider chooses between formulations based on the protocol intensity.
- How is the immune formulation dosed?
- Common active-illness loading is 1.6 mg every other day for the first week then 1.6 mg twice weekly thereafter for 6 to 8 weeks. Optimal Balance Pharmacy compounds the formulation against PeptideRx prescriptions; your provider sets the protocol on your shipment sheet.
- When should I take the immune formulation?
- Start as early in the illness course as possible for acute protocols; thymosin alpha-1 has the strongest documented effect when used before T-cell exhaustion sets in. For chronic-illness protocols, dose consistently throughout the course. Track symptom resolution and follow-up inflammatory or viral-load markers as available.
- How is the immune formulation supplied?
- Compounded by Optimal Balance Pharmacy under a 503A patient-specific prescription. Ships pre-reconstituted and ready to inject in cold-chain packaging. Every batch is tested by Eagle Analytical Services; the Certificate of Analysis is published on this product page.