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Everything you need to know about Thymosin Alpha-1 (TA1) dosing — protocols, safety, and where to buy.
Dose Range
1,600 mcg (1.6 mg) per injection (standard clinical dose)
Frequency
2–3 times per week subcutaneous
Cycle Length
4–12 weeks; can be used long-term for immune support
Half-Life
~2 hours
Calculate syringe units instantly
Syringe Draw
10.0 units
2500 mcg/ml · 0.100 ml draw
Contraindications
Active autoimmune conditions being treated with immunosuppressants. Organ transplant recipients. Pregnancy or breastfeeding.
Approved internationally as Zadaxin® (thymalfasin) for hepatitis B and as an immune adjuvant in cancer therapy. The 1.6 mg dose is well-established across 30+ countries. Can be used prophylactically or therapeutically during illness.
Where to Buy Thymosin Alpha-1 (TA1)
Compare 2 listings across 2 vendors — from $44.99
The typical dose range for Thymosin Alpha-1 (TA1) is 1,600 mcg (1.6 mg) per injection (standard clinical dose). It is usually administered 2–3 times per week subcutaneous. Always start with the lowest effective dose.
2–3 times per week subcutaneous
Yes, typical cycle length is 4–12 weeks; can be used long-term for immune support.
Mild flu-like symptoms during initial use (immune activation), injection site reactions, fatigue. Rare: headache, mild GI discomfort. Generally very well-tolerated.
Compare 2 listings from 2 vendors on our price comparison page — starting from $44.99.