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 to 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
Thymic immune peptide
Read the Thymosin Alpha-1 protocol guide
The 2025 TESTS sepsis trial failed. The hepatitis B evidence stays strong. ME/CFS, Long Lyme, Long COVID applications are mechanistically plausible. 20 to 30 percent non-responder rate.
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 RxPepsDirect. RxPepsDirect prescribes; Optimal Balance Pharmacy compounds and dispenses; Eagle tests every batch. Three separate companies. Browse our full quality program on the quality page.
How to get Thymosin Alpha-1 prescribed online
Thymosin Alpha-1 is available by prescription through a licensed telehealth visit and dispensed for human use by a named 503A pharmacy. That is what separates it from research-use-only vials sold without a prescription. There is no subscription and no membership, just a one-time visit fee.
- 1
Complete a $39 medical visit. Answer a short intake about your health history and your goals for Thymosin Alpha-1. The $39 fee is the only charge RxPepsDirect collects, paid once, not a recurring subscription.
- 2
A licensed provider reviews it. A US-licensed nurse practitioner or physician reviews your intake and, if Thymosin Alpha-1 is appropriate for you, writes a patient-specific prescription. The starting dose is typically 20 units (0.6mg).
- 3
The pharmacy compounds and ships it. Optimal Balance Pharmacy, a 503A pharmacy in Texas, compounds Thymosin Alpha-1 and ships it pre-reconstituted by FedEx overnight in a reusable cooled case. Your fill is Injectable vial (5mL, 3mg/mL, 15mg total), and you pay the pharmacy $80/15mg at wholesale, with no clinic markup, plus a $15 flat FedEx overnight shipping fee charged by the pharmacy.
RxPepsDirect prescribes Thymosin Alpha-1 in the 28 states its medical team is licensed in. Start a $39 visit or browse the full Immune Optimization range.
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 RxPepsDirect 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.