Thymosin Alpha-1
Also known as Ta1, Thymalfasin, Zadaxin
Thymosin Alpha-1 is a 28-amino acid peptide naturally produced by the thymus gland. It's a potent immune modulator used clinically in some countries for hepatitis B/C, cancer, and immunodeficiency — and is increasingly used by biohackers for immune optimization and longevity.
How it works
Activates dendritic cells and T-helper cells, upregulates MHC class I expression, and increases production of cytokines like IL-2 and IFN-γ. Restores immune homeostasis.
Benefits
- Powerful immune system modulation and enhancement
- Antiviral and antibacterial activity
- Anti-tumor effects in combination with other therapies
- Increases T-cell activity and NK cell function
- Reduces chronic inflammation
- Supports thymus function in aging
Dosing
900–1600 mcg · 2–3x per week
Clinical dosing is 1.6mg twice weekly. Biohacker protocols often use 900mcg–1.6mg 2–3x/week.
Ranges reflect commonly cited research protocols, not a prescription. Dose with a licensed provider.
Reconstitution
1mg vial with 1mL BAC water = 1mg/mL
Helix’s free reconstitution calculator gives you the exact draw volume → get the app
Common stacks
Reported side effects
- Injection site reaction
- Rare flu-like symptoms
- Generally well tolerated
Who it’s for
Those with chronic illness, immunodeficiency, frequent infections, autoimmune conditions, or longevity-focused protocols. Not typically for healthy young adults.
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