Peptide Compass · Research
Thymosin alpha 1: research, prices and suppliers
A naturally occurring thymus-derived immune peptide, approved as a medication in more than 35 countries, though not currently in Germany, Austria, or Switzerland.
Thymosin alpha 1 is a 28-amino-acid peptide originally isolated from the thymus gland, the central organ where T cells mature. It acts as an immune modulator and is used both in clinical research and, under the trade name Zadaxin, as an approved medication for certain immune conditions. Areas of study include chronic viral infections, the immune response to vaccination, and a supportive role in oncology.
Facts
- CAS number: 62304-98-7
- Molecular weight: 3108.3 g/mol
- Amino acids: 28
- Purity specification: ≥ 98 % (HPLC, commercial standard)
Evidence
- A retrospective review of 76 patients with severe COVID-19 across two hospitals described lower mortality under thymosin alpha 1 compared with the untreated group, accompanied by a recovery of T-cell counts. Liu et al. 2020, Clinical Infectious Diseases
- A randomized trial in 42 patients with non-small cell lung cancer after radiation described faster normalization of T-cell function under thymosin alpha 1 versus placebo, along with a survival benefit, most pronounced in patients with smaller tumors. Schulof et al. 1985, Journal of Biological Response Modifiers, PMID 3998766
Frequently asked questions
Is thymosin alpha 1 an approved medication?
Yes, under the trade name Zadaxin in more than 35 countries, including for chronic hepatitis B and C. There is currently no approval in Germany, Austria, or Switzerland.
What does thymosin alpha 1 act on in the immune system?
It acts on both the innate and the adaptive immune system at once, including through increased activity of T cells and natural killer cells, and improved antibody formation.
Are there human studies on thymosin alpha 1?
Yes, compared with many other peptides there is a broader base of clinical studies, including work on severe viral infections, a supportive role in cancer care, and vaccine response.
Documented prices
Prices are recorded snapshots. Each entry states its date, currency and pack variant. Shipping, tax treatment, discount conditions and availability must be rechecked in the shop. A low price is not evidence of quality.
List prices excluding shipping and discounts. Currency and product variants must be compared separately. Availability and delivered batch have not been verified.
| Vendor | Pack | List price | Price/mg | Recorded | Source |
|---|---|---|---|---|---|
| Beyond Peptides | 5 mg | 38.95 EUR | 7.79 EUR/mg | 2026-09-15 | Product page · Ad |
| Peptide Shop Deutschland | 5 mg | 43.99 EUR | 8.8 EUR/mg | 2026-09-15 | Product page · Ad |
| Particle Peptides | 5 mg | 49.99 EUR | 10.0 EUR/mg | 2026-09-15 | Product page · Ad |
| Peptide Labz | 5 mg | 60 EUR | 12.0 EUR/mg | 2026-09-15 | Product page · Ad |
| Peptidwerk | 10 mg | 39.95 EUR | 4.0 EUR/mg | 2026-09-15 | Product page · Ad |
| Europa-Peptide | 10 mg | 44.9 EUR | 4.49 EUR/mg | 2026-09-15 | Product page · Ad |
| Smart Peptides | 10 mg | 69.9 EUR | 6.99 EUR/mg | 2026-09-15 | Product page · Ad |
| Bio BoostX | 10 mg | 69.95 EUR | 7.0 EUR/mg | 2026-09-15 | Product page · Ad |
| Peak Peptide | 10 mg | 79.9 EUR | 7.99 EUR/mg | 2026-09-15 | Product page · Ad |
| Peptide Labz | 10 mg | 100 EUR | 10.0 EUR/mg | 2026-09-15 | Product page · Ad |
| DN Lab Research | 30 mg | 236 EUR | 7.87 EUR/mg | 2026-09-15 | Product page · Ad |
| Chameleon Peptides | 5 mg | 53.1 USD | 10.62 USD/mg | 2026-09-15 | Product page · Ad |
| Licensed Peptides | 5 mg | 61.99 USD | 12.4 USD/mg | 2026-09-15 | Product page · Ad |
| Chameleon Peptides | 10 mg | 81.9 USD | 8.19 USD/mg | 2026-09-15 | Product page · Ad |
| Protide Health | 10 mg | 105 USD | 10.5 USD/mg | 2026-09-15 | Product page · Ad |
| American Peptides | 10 mg | 125 USD | 12.5 USD/mg | 2026-09-15 | Product page · Ad |
Questions about interpretation
What does the search “Thymosin alpha 1 protocol” mean?
“Protocol” is often used to mean a regimen. This page explains research and documented listings. It contains no doses, cycles or instructions for human use. An online regimen is not scientifically validated simply because it is widely shared.
Sources and data basis
These references come from the existing dataset. A link alone verifies neither a study claim nor supplier quality. Uncertainty remains explicit where records are undated or incomplete.
- Liu et al. 2020, Clinical Infectious Diseases
- Schulof et al. 1985, Journal of Biological Response Modifiers, PMID 3998766
- PMID 3998766
Where to go next
Created with AI assistance. This new edition has not yet received independent editorial review.