Not medical advice. Talk to your provider before using any peptide.
Full disclaimerPeptide Schedule Research TeamReviewed Apr 202614 Citations
Thymosin Alpha 128 residuesSDAAVDTSSEITTKDLKEKKEVVEEAENEach bubble = one amino acid. Size = residue mass. Color = chemical class.Thymosin Alpha 1 is an immune-modulating peptide approved in 35+ countries for hepatitis B and studied in 11,000+ patients. It primes T-cell and NK cell function without stimulant-like effects. FDA compounding restrictions disrupted US access. Research peptide status in the US.
1,600mcg · 2x/week
Summary: Add 2mL BAC water to your 5mg vial. Draw to 64.0 units on a U-100 syringe for a 1,600mcg dose. This vial will last 3 doses.
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| Level | Dose / Injection | Frequency |
|---|---|---|
| Beginner | 1,600mcg | 2x/week |
| Moderate | 1,600mcg | 2x/week |
| Aggressive | 1,600mcg | 3x/week |
Reconstitution math for a 10 mg vial with 2.0 mL bacteriostatic water: concentration is 5000 mcg/mL. Total volume is 200 units on a 100-unit insulin syringe (you'll need to refill). Each unit delivers 50 mcg. So 1600 mcg is 32 units, 750 mcg is 15 units. For a 5 mg vial with 2.0 mL bacteriostatic water: concentration is 2500 mcg/mL. Each unit delivers 25 mcg. So 1600 mcg is 64 units, 750 mcg is 30 units. The 10 mg vial is your better value. At 1600 mcg twice weekly, one vial covers just over 3 injections. Budget about $29/month from research-chemical sources ($45 per 10 mg vial). Zinc matters. Tα1 requires zinc as a cofactor for T-cell and NK cell activation. Test RBC zinc before your protocol and supplement 15 to 30 mg zinc glycinate daily if deficient. Skipping this step is probably the most common beginner mistake. Don't judge efficacy by how you feel. Tα1 produces no acute subjective signal. Get bloodwork (CBC with differential, CD4+/CD8+ counts) at baseline and week 8. That's the confirmation window.
Dosing based on Zadaxin prescribing information: 1.6 mg SC twice weekly (hepatitis B/C trials, 11,000+ subjects) — 18 published references.View all sources →
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Pricing updated 2026-04-09
Prices are estimates and vary by source, location, and prescription status.Full pricing breakdown →
Disclaimer: This curve is a simplified first-order exponential decay model. Actual pharmacokinetics vary based on injection site, individual metabolism, body composition, and other factors. Half-life values are approximate and based on available preclinical and clinical literature. Many research peptides lack formal human pharmacokinetic studies. This is for educational purposes only — not medical advice.
Thymosin Alpha 1 is an immune-modulating peptide approved in 35+ countries for hepatitis B and studied in 11,000+ patients. It primes T-cell and NK cell function without stimulant-like effects. FDA compounding restrictions disrupted US access. Research peptide status in the US.
