Thymosin Alpha-1 vs Thymalin: price and facts compared (2026)
At the standard size, Thymalin is the cheaper of the two today at $70.00 from American Peptides. Both are research-use-only materials and are not substitutes for each other.
| Thymosin Alpha-1 | Thymalin | |
|---|---|---|
| Category | Longevity | Bioregulators |
| Standard size | 10mg | 20mg |
| All sizes | 5mg, 10mg | 10mg, 20mg, 100mg |
| Cheapest now | $75.00 at Blank Peptides | $70.00 at American Peptides |
| Price per mg | $7.50/mg | $3.50/mg |
| Vendors | 2 | 1 |
| Forms | Vial | Vial |
| Regulatory status | Approved in over 30 countries as Zadaxin (thymalfasin); not FDA-approved. | Registered as a medicine in Russia; not approved in the US or EU. |
| Stock | In stock | In stock |
Thymosin alpha-1 is a 28-amino-acid peptide first isolated from calf thymus, approved in several countries as thymalfasin for hepatitis B and as a vaccine adjuvant. It is sold lyophilized in 5 mg and 10 mg vials for research.
Thymosin Alpha-1 prices →Thymalin is a polypeptide bioregulator derived from calf thymus, studied in Russian immunology research since the 1980s. It is sold lyophilized in 10–100 mg vials.
Thymalin prices →Questions
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