Is Thymosin Alpha-1 FDA-approved?

Not in the United States. It is approved in many other countries for chronic hepatitis.

Thymosin Alpha-1 Calculator

Also known as: Tα1, Zadaxin

Immune

Default: 5mg / 2mL / 1.6mgAdjust inputs to match your vial

About

What is Thymosin Alpha-1?

Thymosin Alpha-1 is a 28-amino-acid immunomodulatory peptide derived from the thymus. It is approved in many countries (as Zadaxin) for hepatitis B, hepatitis C, and as an adjuvant in cancer therapy. Typical adult dosing is 1.6 mg subcutaneously twice weekly.

Common vial sizes

1.6 mg	lyophilized powder
5 mg	lyophilized powder
10 mg	lyophilized powder

Reference dose ranges

0.4 mg	≈ 16 U-100 units (at 5mg / 2mL)
0.9 mg	≈ 36 U-100 units (at 5mg / 2mL)
1.6 mg	≈ 64 U-100 units (at 5mg / 2mL)

Reconstitution

How it's typically prepared

Reconstitute with sterile or bacteriostatic water per label. Refrigerate.

FAQ

Frequently asked questions

Is Thymosin Alpha-1 FDA-approved?: Not in the United States. It is approved in many other countries for chronic hepatitis.

Sources

References

PubMed search: thymalfasin thymosin alpha 1

Sourcing

Where researchers source this

Vendors below have been manually vetted for third-party COA practice and shipping reliability. Verify the current Certificate of Analysis on the vendor's product page before purchase.

Particle Peptides

EU-based vendor (Slovakia, since 2015) shipping to EU, UK, and Switzerland. The only European supplier publishing all seven test parameters per batch (purity, identity, content, bioburden, endotoxins, heavy metals class 1 & 2). Manufacturer is cGMP / ISO 9001 / ISO 13485 compliant.

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Other Immune peptides

Notice

PeptideDose is an educational reference. It is not medical advice and does not replace consultation with a licensed healthcare provider. Doses shown in presets are derived from published protocols and product labels — they are not personal recommendations.