Ordered Friday 3 PM, delivered Tuesday morning in Utrecht. Neatly packed and the COA simply arrived by email.
Sven K.
Verified purchase
Thymosin Alpha-1
Thymus peptide (28 amino acids), studied around the immune response.
4.8 · 31 reviews≥ 99.1% HPLCLab-verifiedResearch only
Buy Thymosin Alpha-1, research-grade — ≥99% HPLC, same-day shipping from the Netherlands. Thymus peptide (28 amino acids) studied around fine-tuning the immune response.
€ 64,95
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Bacteriostatic water
Insulin needles
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1
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Ships from NL · 1–2 day EU delivery
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Thymosin Alpha-1 is a 28-amino-acid peptide your body naturally makes in the thymus — the gland where immune cells are trained. In research it has been known for decades as an immunomodulator: a compound that fine-tunes the immune response rather than simply revving it up. At GradePurity you buy it as a research-grade vial: ≥99% HPLC purity and same-day shipping from the Netherlands. It is explicitly a research raw material for the lab, not for human use.
What does Thymosin Alpha-1 do?
In research, Thymosin Alpha-1 is all about one thing: the immune system. It is a small 28-amino-acid peptide your body naturally makes in the thymus — the gland where immune cells are trained. It is thought to work like a kind of conductor that fine-tunes the immune response: it helps T-cells mature and switches the immune system on where it is needed. Researchers therefore reach for it mainly as an immunomodulator. At GradePurity you buy it purely as a research raw material, not for use in humans.
How does Thymosin Alpha-1 work?
The strength of Thymosin Alpha-1 is in fine-tuning, not revving up. It is thought to act on the cells that direct the immune response — chiefly T-cells and the dendritic cells that raise the alarm when an intruder appears. Through that route it helps align the innate and the adaptive defences, and brings the balance between the Th1 and Th2 arms of the immune system back into equilibrium. Most of what we know comes from lab and clinical research on the synthetic form. GradePurity supplies Thymosin Alpha-1 for research only.
Thymosin Alpha-1, Thymalfasin and Zadaxin
If you come across different names, they often mean the same thing. Thymosin Alpha-1 is the research name for the natural peptide; Thymalfasin is the official name of the synthesised form, and Zadaxin is the brand name under which that form is registered as a medicine in a number of countries. In the literature these terms are used interchangeably. We supply it as a research-grade vial for laboratory research — not the registered medicinal form.
Thymosin Alpha-1 vs. Thymosin Beta-4 (TB-500)
The names look alike, but they are two separate peptides. Both belong to the thymosin family, yet research looks at very different things: Thymosin Alpha-1 is about the immune response, while Thymosin Beta-4 — known from the fragment TB-500 — is mainly linked to tissue repair and the movement of cells. If you want to study the recovery side, you will find TB-500 separately in our range; Thymosin Alpha-1 is the immune side of the story. All for research only.
Thymosin Alpha-1 dosage
We deliberately leave the amount open: Thymosin Alpha-1 is a research compound, and we don't provide human dosing advice. In the literature it is usually studied in small amounts per protocol, after reconstitution with bacteriostatic water. Need to convert amounts for a research setup? We have a dedicated calculator for that. Keep the reconstituted peptide refrigerated and use it within the recommended window.
Thymosin Alpha-1 side effects
Thymosin Alpha-1 is known in research for a mild profile. In the clinical studies done with the synthetic form it was generally well tolerated, and mostly mild reactions were reported — such as redness or irritation at the injection site. Large long-term data in humans is lacking, and effects depend heavily on the study design. GradePurity supplies Thymosin Alpha-1 for research only.
Is Thymosin Alpha-1 legal?
In the Netherlands you may buy and sell Thymosin Alpha-1 for experimental laboratory research that isn't applied to humans or animals. The synthetic form is registered as a medicine in some countries (under the name Zadaxin), but in the Netherlands it is not, and it isn't prescribed. We therefore supply it strictly as a research-grade compound, not as a medicine.
Purity & lab testing
With a peptide, reliable research hinges on one thing: knowing the vial contains what the label says. That's why we test every batch of Thymosin Alpha-1 by HPLC for ≥99% purity and for identity, with a COA per lot, and ship it freeze-dried so it reaches you stable. That way you know exactly what you're holding — the exact specifications are in the table at the bottom of this page.
Frequently asked questions
What our customers say.
Verified buyers across the Netherlands
★★★★★4.9 / 5Verified
BPC-157
Finally a supplier that just shows the HPLC + MS figures. Purity was exactly as promised.
Lotte v.d. B.
Verified purchase
Fast parcel out of the Netherlands. Emailed a question, got a reply within a few hours. Top service.
Paul M.
Verified purchase
Next business day in Rotterdam. Well and discreetly packed, will definitely order again.
Marco R.
Verified purchase
Ordered around 3 PM, delivered Wednesday morning. Unbranded envelope, my courier had no idea what was inside.
Niels J.
Verified purchase
Within 24 hours from NL stock. COA with MS identity confirmation — hard to find anywhere else.
Jonas W.
Verified purchase
Delivery spot-on, COA detailed. Would appreciate a more extensive FAQ per peptide on the site.
Eva R.
Verified purchase
Ordered Tuesday before 4 PM, at my door Wednesday in Breda. Payment went flawlessly.
Bram H.
Verified purchase
Genuinely from NL stock, so no customs hassle. Vial well freeze-dried, everything tightly packed.
Femke S.
Verified purchase
Purity on the HPLC comfortably above 99%. Delivery a day later than hoped, nothing else to fault.
Thijs M.
Verified purchase
Ordered Friday 3 PM, delivered Tuesday morning in Utrecht. Neatly packed and the COA simply arrived by email.
Sven K.
Verified purchase
Finally a supplier that just shows the HPLC + MS figures. Purity was exactly as promised.
Lotte v.d. B.
Verified purchase
Fast parcel out of the Netherlands. Emailed a question, got a reply within a few hours. Top service.
Paul M.
Verified purchase
Next business day in Rotterdam. Well and discreetly packed, will definitely order again.
Marco R.
Verified purchase
Ordered around 3 PM, delivered Wednesday morning. Unbranded envelope, my courier had no idea what was inside.
Niels J.
Verified purchase
Within 24 hours from NL stock. COA with MS identity confirmation — hard to find anywhere else.
Jonas W.
Verified purchase
Delivery spot-on, COA detailed. Would appreciate a more extensive FAQ per peptide on the site.
Eva R.
Verified purchase
Ordered Tuesday before 4 PM, at my door Wednesday in Breda. Payment went flawlessly.
Bram H.
Verified purchase
Genuinely from NL stock, so no customs hassle. Vial well freeze-dried, everything tightly packed.
Femke S.
Verified purchase
Purity on the HPLC comfortably above 99%. Delivery a day later than hoped, nothing else to fault.
Thijs M.
Verified purchase
The BPC + TB stack comes as two separate vials, each with its own COA. Not pre-mixed — exactly what I wanted.
Tom B.
Verified purchase
The COA was clear and readable. Delivered the next business day in The Hague. Helpful support by email.
Charlotte F.
Verified purchase
Arrived in a plain, neutral envelope. My neighbour who took it in literally had no clue what was inside. Privacy = 10.
Anouk d. V.
Verified purchase
Purity per COA 99.3%. Vial nicely freeze-dried, no yellow discolouration. Shipping from NL trouble-free.
Lukas K.
Verified purchase
Emailed a question on Saturday, Monday morning I got a reply from a real person. No cookie-cutter template. Real service.
Sara P.
Verified purchase
Shipped to Tilburg in one business day. Payment trouble-free. Identity neatly confirmed by MS on the COA.
Daniel S.
Verified purchase
Second order. The first was problem-free, so no reason to look elsewhere. COA again with HPLC + MS figures.
Iris K.
Verified purchase
Messaged a question about storage, got a clear answer. Nice that there is simply someone reachable.
Joris V.
Verified purchase
Completely neutral packaging, nothing visible on the outside. Delivered next day in Nijmegen. Exactly what I was after.
Sanne D.
Verified purchase
Shipped quickly from the Netherlands, and the COA confirmed the purity nicely. Third time ordering here without complaints.
Ruben T.
Verified purchase
The BPC + TB stack comes as two separate vials, each with its own COA. Not pre-mixed — exactly what I wanted.
Tom B.
Verified purchase
The COA was clear and readable. Delivered the next business day in The Hague. Helpful support by email.
Charlotte F.
Verified purchase
Arrived in a plain, neutral envelope. My neighbour who took it in literally had no clue what was inside. Privacy = 10.
Anouk d. V.
Verified purchase
Purity per COA 99.3%. Vial nicely freeze-dried, no yellow discolouration. Shipping from NL trouble-free.
Lukas K.
Verified purchase
Emailed a question on Saturday, Monday morning I got a reply from a real person. No cookie-cutter template. Real service.
Sara P.
Verified purchase
Shipped to Tilburg in one business day. Payment trouble-free. Identity neatly confirmed by MS on the COA.
Daniel S.
Verified purchase
Second order. The first was problem-free, so no reason to look elsewhere. COA again with HPLC + MS figures.
Iris K.
Verified purchase
Messaged a question about storage, got a clear answer. Nice that there is simply someone reachable.
Joris V.
Verified purchase
Completely neutral packaging, nothing visible on the outside. Delivered next day in Nijmegen. Exactly what I was after.
Sanne D.
Verified purchase
Shipped quickly from the Netherlands, and the COA confirmed the purity nicely. Third time ordering here without complaints.
Ruben T.
Verified purchase
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