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Generic Peptides
Estimated Delivery: 12-26 Days (International), 3-6 Days (United States)
Return within 45 Days of purchase. Duties & taxes are non-refundable.
Buy Thymosin Alpha-1 2, 3, 5, 10 and 15 mg vials by Generic Peptides at XSteroids. Thymosin Alpha-1 is a synthetic 28 amino acid copy of a thymus hormone, shipped as a lyophilized powder for laboratory work. Read on for the composition, the way it nudges the immune system, what the clinical record actually reported, the water volume that fits each vial, and the storage and legal picture.
Outside the United States, several countries license thymalfasin for chronic hepatitis B and C. Those licensed ampoules are not what this page lists: the powder here is research material, and no quantity quoted below has been approved as a dose for people.
The molecule is a 28 amino acid fragment with the sequence Ac-SDAAVDTSSEITTKDLKEKKEVEEEAEN and a molecular mass of about 3108 daltons. It is produced from a larger precursor, prothymosin alpha, and the synthetic version carries the international name thymalfasin. It was first isolated in 1977 from thymosin fraction 5 as a heat-stable acidic peptide.
Every option listed here is a single glass vial holding white lyophilized powder in the strength you pick - 2 mg, 3 mg, 5 mg, 10 mg or 15 mg. Water for mixing is sold apart and must be sourced separately. No filler list is published by this supplier and no independent potency test exists in the public record, so the page stays with what Generic Peptides documents.
Thymosin Alpha-1 is a biological response modifier rather than a receptor agonist in the usual sense. Its target is the immune system: it acts on the maturation and function of T lymphocytes and on the production of cytokines, and in animals without a thymus it restored immune function in the studies that described it. The practical consequence is that the peptide does not bind a single clean receptor the way a beta agonist does; it tunes a network.
The pharmacokinetics have been measured in humans. After a 900 mcg subcutaneous dose in healthy volunteers, peak concentration arrived about 1 to 2 hours after injection and the half-life was on the order of 2 to 3 hours. That short profile is why clinical protocols use repeated dosing rather than one large injection. In the clinical literature the route is subcutaneous, twice a week, with single doses spanning 0.8 to 6.4 mg; the registered Zadaxin label uses 1.6 mg twice weekly, usually for courses of around 12 weeks.
The human evidence base is old and narrow. Trials and labels describe use in chronic hepatitis B and C, and the peptide is studied in sepsis, severe respiratory infection and immune support during cancer treatment. Listed this way, these are research directions, not promised outcomes.
The honest limit is the COVID-19 data. A 2023 review of hospitalized patients found no reduction in mortality or length of stay with thymosin alpha-1, which is exactly the kind of result that separates a study finding from a marketing claim. What the studies support is a measurable effect on T-cell and cytokine markers; what they do not support is a claim of protection against infection. Where the sources are silent, this page stays silent.
The mix follows the water you add: milligrams in the vial split across the millilitres introduced to give mg per ml. A U-100 barrel numbers 10 units for each 0.1 ml, because a single unit measures 0.01 ml. Put 1 ml into the 2 mg vial for 2 mg per ml, where 0.1 ml carries 200 mcg and shows as 10 units. A 3 mg vial with 1.5 ml, a 5 mg vial with 2.5 ml and a 10 mg vial with 5 ml all land on that same 2 mg per ml, so every 0.1 ml draw is again 200 mcg. The 15 mg vial wants 5 ml, which gives 3 mg per ml, and 0.1 ml then carries 300 mcg.
For scale, a 10 mg vial at a 1.6 mg research dose works out at about 6 injections, which is roughly three weeks of a twice weekly schedule. That is arithmetic on the label, not a recommended protocol. Swirl, do not shake, and label the vial with its concentration before refrigerating.
The natural neighbors sit on the immune and longevity shelf. Thymalin 20 and 50 mg is the other thymus peptide in the catalog, Epitalon 10 and 50 mg is studied in the same aging literature, and NAD+ 100 to 750 mg covers the cellular energy line.
For the antioxidant and recovery side, Glutathione 200 and 500 mg and 5-Amino-1MQ 10 and 50 mg are the other support vials research write-ups list beside it. None of these combinations is approved.
Thymosin Alpha-1 is one of the few items in this catalog with a real registered label somewhere in the world, which makes it attractive to researchers who want a compound with a documented pharmacology. The caution is the other side of the same coin: the approved indication is a specific viral disease, the US market has no approval, and the review evidence in severe infection is negative. Anyone reading a vendor page that promises immune protection in every setting is reading marketing, not data.
Reported reactions at injection sites include pain, redness and swelling, and systemic reports include a transient rise in liver enzymes, nausea and flu-like feelings. Because the peptide acts on immune signaling, anyone with an autoimmune condition is a poor candidate for unsupervised use. This page lists what the sources report; it does not claim the list is complete.
The dry powder keeps at 2 to 8 C in a dark place. After water is added the vial is refrigerated, holds at 2 to 8 C, has to be finished inside 28 to 30 days and must never be frozen. A cloudy solution or one carrying particles gets discarded.
The registered products are prescription medicines in the countries that approved them. Thymosin alpha-1 is not named on the WADA Prohibited List, which does not equal permission, since class S0 covers unapproved performance substances. The Generic Peptides vial is sold as a research product with no approval for human use.
You can order Thymosin Alpha-1 at XSteroids from the Generic Peptides brand catalog. All five strengths share one page, the checkout is encrypted, US addresses are served in 3 to 6 days, and the rest of the world in 12 to 26 days. Linked cards show the thymus, longevity and antioxidant neighbors from the same brand.
It is a 28 amino acid peptide with a molar mass near 3108 daltons, first isolated from thymosin fraction 5 and later identified as a fragment of prothymosin alpha. The synthetic version is called thymalfasin and is sold in some countries as Zadaxin. Generic Peptides supplies it as a lyophilized research vial.
It is classed as a biological response modifier. Published work describes effects on the maturation and function of T lymphocytes, the cells that coordinate cellular immunity, and on cytokine signaling between immune cells. Early animal studies found it could restore immune function in animals without a thymus.
Add 5 ml of bacteriostatic water to the 10 mg vial for 2 mg per ml. In that solution 0.1 ml holds 200 mcg and reads as 10 units on a U-100 syringe, so the clinical 1.6 mg amount is 0.8 ml. Swirl gently, never shake, then refrigerate.
The registered schedule for chronic hepatitis B is 1.6 mg injected subcutaneously twice a week, usually for about twelve weeks. Across the wider literature single doses have ranged from 0.8 to 6.4 mg twice weekly. At 1.6 mg per injection a 10 mg vial covers six injections, roughly three weeks.
Yes, in a number of countries outside the United States, where it is registered for chronic hepatitis B and used in other immune indications. There is no FDA approval in the United States, so the vial sold here is a research product rather than a prescription medicine, and no dose is approved for healthy adults.
A 2023 review of hospitalized COVID-19 patients found that thymosin alpha 1 did not reduce mortality or shorten hospital stay. That result is worth holding next to the positive hepatitis data, because it shows how quickly an immune-modulating signal can disappear in a large, sick population.
You can buy Thymosin Alpha-1 by Generic Peptides online at XSteroids, direct from the brand catalog. Choose the 2, 3, 5, 10 or 15 mg vial on this page and check out securely. US domestic shipping takes 3 to 6 days and international delivery 12 to 26 days.
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