Research peptides · Third-party tested
You're in
It is saved in this browser and applies at checkout by itself. We also emailed it to you.
Access closed
Nothing on this site is available to anyone under 21, and nothing on it is intended for personal use at any age.
Online ordering is open. Ships in 1 to 2 business days. Tracked 2-day shipping, plain box. Every compound third-party tested
Type to search. Enter opens the first match. Esc closes.
Synthetic thymic peptide, sold for laboratory research.
Identity
The thymus, a small organ behind the breastbone that trains immune cells early in life, naturally produces a short peptide called Thymosin Alpha-1. The synthetic version, thymalfasin, is sold under the brand name Zadaxin and is an approved medicine in a number of countries outside the United States, though not by the FDA. Researchers have studied it mainly for its effects on immune cell activity.
Thymosin Alpha-1 is a synthetic thymic peptide of 28 amino acid residues. SBz Industries sells it for laboratory research.
Research
In plain terms, with a link to every study. The most useful thing to notice is what each study was done in.
Thymosin Alpha-1 has decades of published research, much of it in people, mostly measuring immune cell markers in hospital settings. A 2025 review pulled together lab and human work on how the immune system changes with age.
people2011
A small pilot trial of 24 adults in hospital intensive care, randomized to standard care alone or with Thymosin Alpha-1 for 7 days. The team tracked an immune cell marker called HLA-DR and lab culture results over 28 days.
Thymosin alpha 1 is associated with improved cellular immunity and reduced infection rate in severe acute pancreatitis patients in a double-blind randomized control study.
Wang and colleagues, Inflammation
review2025
This review pulls together lab and human research on how the thymus gland shrinks with age and how Thymosin Alpha-1 affects T-cell production and vaccine response in older adults. It also describes a related fusion drug that pairs Thymosin Alpha-1 with another immune-signaling protein, used in some countries.
Aging and Thymosin Alpha-1.
Simonova and colleagues, International Journal of Molecular Sciences
Each study links to its record on PubMed, the US National Library of Medicine database. Checked 25 September 2026.
Handling
Lyophilized: -20C, protected from light. Reconstituted: 2-8C.
Give the vial twenty minutes on the bench before opening it, so water does not condense onto the powder.
Slowly, down the inside wall of the vial, never straight onto the powder.
Leave it alone until it clears. Do not shake it. Shaking damages the peptide.
Once mixed, it breaks down much faster than the dry powder. Keep it cold and dark.
Documentation
An independent lab tests every compound we sell. It confirms the compound is what the label says and measures purity by HPLC.
The latest certificate is on the product page, so you can read the result before you order.
See the certificateRead next
Questions
The thymus, a small organ behind the breastbone that trains immune cells early in life, naturally produces a short peptide called Thymosin Alpha-1. The synthetic version, thymalfasin, is sold under the brand name Zadaxin and is an approved medicine in a number of countries outside the United States, though not by the FDA. Researchers have studied it mainly for its effects on immune cell activity. SBz Industries sells it for laboratory research only.
No. Thymosin Alpha-1, sold as Zadaxin, is approved as a medicine in a number of countries outside the United States, but it does not have FDA approval.
Human studies have mostly tracked immune cell markers in hospital settings. More recent review work looks at how the immune system changes with age.
Thymosin Alpha-1 ships as a freeze-dried powder. Mix it with bacteriostatic water, added slowly down the inside wall of the vial, and let it dissolve without shaking. The researcher decides the working concentration, not us, and we publish no protocols.
Lyophilized: -20C, protected from light. Reconstituted: 2-8C. Vials ship in plain outer packaging with no product name on the outside.
Yes. An independent lab tests every compound: it confirms the compound is what the label says and measures purity by HPLC. The latest certificate is on the product page, and you can read it before you order.
Researchers and institutions, 21 or over. By ordering you confirm the material is for laboratory research and will not be used in humans or animals.
Order
Every compound is third-party tested, with the certificate on its product page. Every order ships in plain packaging.