Best Thymosin Alpha-1 Vendors (2026)
Where to buy Thymosin Alpha-1 (also sold as Tα1, Thymalfasin, TA1): the 15 vendors below are the ones we have a dated product-page price for, ranked on documentation first and price second. Nothing here is typed from memory — every number links to a date.
Research use only. Compound Review scores vendors on documentation — laboratory certificates, lot records, pricing and company identity. Nothing on this page is guidance on human or veterinary use, dosing or health outcomes.
- 1MyPurePeptide10/102 certificates verified at the lab10mg vial$50.00−20%$40.00with code
- 21 certificate verified at the lab10mg vial$59.99−37%$37.79sale $41.99, then code
- 3Snap Peptides9/101 certificate verified at the lab10mg vial$60.00−10%$54.00with code
- 4ezPeps9/101 certificate verified at the lab10mg vial$59.99−20%$47.99with code
- 5PS Peptides8/102 certificates verified at the lab5mg vial$34.99−10%$31.49with code
- 6Amplified Labs8/101 certificate verified at the lab10mg vial$60.00−15%$51.00with code
Show the other 2 partners and their codes
- 7GigaCompounds7/101 certificate opened (vendor-hosted)10mg vial$80.00−10%$72.00with code
- 8no certificate opened yet5mg vial$68.88−15%$58.89sale $61.99, then code
- Oneday Compounds10/10 · 8 Nov$4.20/mg$41.99 list · 10mg$37.79 with code
- MyPurePeptide10/10 · 5 Nov$5/mg$50 list · 10mg$40 with code
Per-milligram price is list price over labelled milligrams; it says nothing about what is in the vial. Code prices are list × (1 − the code's stated discount), not cart-tested against sales. We earn a commission on partner links; the rubric does not read partner status.
Where to buy Thymosin Alpha-1: 15 vendors, ranked
Reference size 10mg — the size most of these vendors sell. Other sizes we have on record are listed per vendor.
| # | Vendor | Score | 10mg price | Other sizes | Trustpilot | Buy |
|---|---|---|---|---|---|---|
| 1 | 10/10 | $50.00 $5.00/mg · read 5 Nov 2026 | none read | 4.8 247 reviews | $40.00 with code, 20% off | |
| 2 | 10/10 | $41.99$59.99Sale $4.20/mg · read 8 Nov 2026 17% since 29 Oct | none read | 4.8 88 reviews | $37.79 with code, 10% off | |
| 3 | 10/10 | $59.83$67.99Sale $5.98/mg · read 25 Oct 2026 | none read | 4.7 85 reviews | ||
| 4 | 9/10 | $60.00 $6.00/mg · read 27 Oct 2026 | none read | 4.9 88 reviews | $54.00 with code, 10% off | |
| 5 | ezPepsPartner ILS Laboratories (also Kovera Labs, Freedom Diagnostics, Horizon Analytical) | 9/10 | $59.99 $6.00/mg · read 31 Oct 2026 | none read | 4.8 249 reviews | $47.99 with code, 20% off |
| 6 | 9/10 | $119.00 $11.90/mg · read 10 Oct 2026 | 5mg $63.00 | profile removed | ||
| 7 | 8/10 | not sold at 10mg | 5mg $34.99 | 4.3 223 reviews | 10% off | |
| 8 | 8/10 | $60.00 $6.00/mg · read 28 Oct 2026 | none read | 4.9 94 Google reviews | $51.00 with code, 15% off | |
| 9 | 8/10 | $28.80 $2.88/mg · read 26 Oct 2026 | none read | 3.9 73 reviews | ||
| 10 | ILS Laboratories (also Freedom Diagnostics, Vanguard Laboratory, BTLabs) | 8/10 | $39.00 $3.90/mg · read 31 Oct 2026 | none read | 4.4 30 reviews | |
| 11 | 7/10 | $80.00 $8.00/mg · read 5 Nov 2026 | none read | 4.8 65 reviews | $72.00 with code, 10% off | |
| 12 | Horizon Analytical (also ILS Laboratories) | 7/10 | $27.99$39.99Sale $2.80/mg · read 31 Oct 2026 | none read | 4.6 451 reviews | |
| 13 | ILS Laboratories (on certificates) · page credits Freedom Diagnostics | 7/10 | $59.95 $6.00/mg · read 5 Nov 2026 | none read | profile removed | |
| 14 | 7/10 | not sold at 10mg | 5mg $41.25 | profile removed | ||
| 15 | Licensed PeptidesPartner Vanguard Laboratory (printed 'Vangaurd' on COA panels) | 5/10 | not sold at 10mg | 5mg $61.99 | profile removed | 5% off |
What makes Thymosin Alpha-1 different to source
Thymosin alpha-1 (thymalfasin) is a 28-residue peptide that is approved as a prescription product in a number of countries and sold on the research market by fewer vendors than the popular healing peptides. It is longer and more expensive to synthesise than most compounds here, and vial sizes are correspondingly smaller.
It is routinely confused with TB-500, which is a fragment of thymosin beta-4 — a different protein with a different sequence and a different research literature. Catalogs list the two near each other and the names look alike; the certificate's mass-spectrometry identity is what tells them apart.
At least one vendor we read listed it as out of stock at the time. Availability is noted per vendor, and the ordering is by rubric score first because the field is too small for a price ranking to mean much.
The top 3, explained
MyPurePeptide
10/10Affiliate partnerWhat we can verify
Janoshik Analytical report #223088 for BPC-157 10mg batch 10242025B2 (sample received 17 Aug, analysed 24 Aug 2026): 11.61mg measured, purity 99.635%. We opened it on the lab's own verification page (key 1GTY19EIMQE4) on 30 Sep 2026 — client, manufacturer and batch print as MyPurePeptide. A public COA directory lists 103 report records across 47 products, each with task number, verification key, report batch, the original report image and the sample photograph, plus endotoxin reports for most lots; every product page links its current report. Open catalog with sized prices (BPC-157 10mg $25; TB-500 10mg $25; GHK-Cu 100mg $35; Ipamorelin 10mg $25; Tesamorelin 10mg $40; NAD+ 500mg $35). Legal entity myPurePeptide LLC with a mailing address in Austin, Texas; Visa and American Express at checkout. Trustpilot 4.8 across 247 reviews (read 10 Oct 2026), claimed December 2025.
Net content: Report states 11.61mg measured on a 10mg label (116% — just over our 115% flag line), purity 99.635%; TB-500 #223097 11.54mg / 99.007%
Where it falls short
The printed address (12407 N Mopac Expy Ste 250 PMB 570, Austin) is a commercial mailbox, not premises — identity is awarded on the named LLC with that disclosure. The BPC-157 report measures 11.61mg on a 10mg label, 116% — just over our 115% flag line; TB-500 10mg measured 11.54mg. The vendor's own site says a report 'alone does not confirm the lot shipped'. The GLP-class pages print strike-through reference prices far above the selling price (Semaglutide 10mg 'was $399.99', now $70; Retatrutide 10mg 'was $699.99', now $80) — treat the 'you save' figures as marketing. Zelle is offered alongside cards. Returns: 7-day unopened window with a continuous unboxing video required for damage claims. A domain lookalike (mypurepeptides.com) is disclaimed on the vendor's homepage.
Oneday Compounds
10/10Affiliate partnerWhat we can verify
Read 29 October 2026 through a registered account (prices and the COA library sit behind a login). A WooCommerce store with 49 listings, sized pricing on each, all shown at 40% off a struck list price during a rebrand to 'BY ONEDAY' (BPC-157 10mg $23.99 from $39.99; TB-500 10mg $29.99; NAD+ 500mg $35.99; GHK-Cu 50mg $20.99; MOTS-c 10mg $26.99). The COA library carries 57 entries, every one with at least one lot-numbered certificate, and the links open on ILS Laboratories' own portal: the retatrutide ('OC-3RT') 10mg report COA-2026-3WBETH, lot OC-RT10-106, analysed 2 Sep 2026, reads 99.63% purity, identity retatrutide confirmed, net content 10.31 mg on a 10 mg label, with three vials averaging 10.37 mg, sterility (USP 71), endotoxin and heavy metals passed. Product pages print the lot shipping (BPC-157 10mg: OC-BPC10-104, 99.82%, 10.30 mg). Oneday Enterprises, LLC d/b/a Oneday Compounds, 2326 Washington Blvd, Fourth Floor, Ogden, Utah.
Net content: COA-2026-3WBETH (OC-3RT 10mg, lot OC-RT10-106): net content 10.31 mg on a 10 mg label, three vials 10.22 / 10.31 / 10.59 mg, purity 99.63%, identity retatrutide confirmed; BPC-157 10mg lot OC-BPC10-104 10.30 mg, 99.82%
Where it falls short
Prices and certificates need a free account (no purchase), which since 1 November 2026 no longer costs the ungated point. All sales are final, with damage to be reported within 24 hours; checkout takes cards, but Zelle carries a 5% discount and the FAQ still lists only Zelle, Cash App, Venmo and ACH. The product pages say 'up to 12X' (ILS lots) and the cart says 'up to 16X'; both hold, because Oneday's Ethos Analytics reports carry a wider panel (checked on CJC-1295/Ipamorelin lot OC-CJI10-104, 1 November 2026). GLP-class products are sold by code (OC-2TZ, OC-3RT); the lab confirms retatrutide for OC-3RT.
Panda Peptides
10/10What we can verify
Read 25 October 2026, logged out. A 45-product WooCommerce catalog with open prices (BPC-157 5mg $21.99, 10mg $39.99; TB-500 5mg $24.99, 10mg $39.99; BPC-157 + TB-500 10/10mg $69.99; CJC-1295 + Ipamorelin 5/5mg $39.99; NAD+ 500mg $38.39; GHK-Cu 50mg $26.87; MOTS-c 10mg $39.99; cagrilintide 10mg $71.99). Semaglutide, tirzepatide and retatrutide sell as 'Single', 'Double' and 'Triple Receptor Agonist' ('Triple' 10mg $53.99). A public COA directory of 43 product entries links 143 original Janoshik Analytical and ILS Labs reports, each with a batch code and a direct verify link. Janoshik #194141 (BPC-157 10mg, batch PP2602-006B, ordered 11 Jun, analysed 26 Jun 2026) returned by verify.janoshik.com with client pandapeptides.com: 11.56 mg on a 10 mg label, purity 99.557%. Operator named on the About and contact pages: Xylo Research Systems LLC, 8139 Sunset Ave #151, Fair Oaks, CA 95628, (916) 678-1880. Trustpilot 4.7 across 85 reviews, profile claimed. Card, Zelle, Cash App and bank transfer per the FAQ.
Net content: Janoshik #194141 reports 11.56 mg BPC-157 on a 10 mg label (116%, over our 115% line, flagged), purity 99.557%, analysed 26 Jun 2026
Where it falls short
Semaglutide, tirzepatide and retatrutide are listed as 'Single', 'Double' and 'Triple Receptor Agonist'; the compound names appear on older Janoshik reports (e.g. #99315 'Semaglutide 5mg') but the current product pages use the code names. The Janoshik BPC-157 report we checked measures 11.56 mg on a 10 mg label, 116% of label, above our 115% line. The Fair Oaks address carries a suite number that reads like a mailbox suite. Finnrick has no vendor page. The one-star Trustpilot review (October 2026) is a dispute over a return; the vendor replied. Reddit coverage is mostly a ranking site's subreddit (r/peptidebenchmark), which runs vendor spotlights.
Before you order, check the batch
A ranking tells you which vendors have good practices; it cannot tell you about the specific vial you receive. When your order arrives, compare the batch number on the label to the certificate. If they do not match, or there is no batch number, the documentation does not cover what you were sent, regardless of who you bought from. How to read a peptide COA.
Buying Thymosin Alpha-1 — frequently asked
Where can I buy Thymosin Alpha-1?
As of 8 Nov 2026, 15 of the 106 vendors on our scoreboard list Thymosin Alpha-1 with a price we have read on the product page: MyPurePeptide, Oneday Compounds, Panda Peptides, Snap Peptides, ezPeps, Pure Peptides, PS Peptides, Amplified Labs, Nexaph, Crush Research, GigaCompounds, Value Research Labs, Puratek Peptides, AIO Peptides, Licensed Peptides. Every one of them is scored on the same 10-point rubric; the table above shows the score, the dated price and what you can verify before ordering.
Who sells the cheapest Thymosin Alpha-1?
At the 10mg size, the lowest price we have on record is Value Research Labs at $27.99 (read 31 Oct 2026) — sale · list $39.99 struck · BOGO + 30% sitewide · read from the store API, https://valueresearchlabs.com/product/thymosin-alpha-1/. It scores 7/10 on documentation. Price is the second sort key on this page, not the first, because an underdosed vial at a low price is the most expensive outcome.
Which Thymosin Alpha-1 vendor has the best documentation?
MyPurePeptide, Oneday Compounds, Panda Peptides share the top score at 10/10: named laboratory, certificates that resolve on the laboratory's own site, measured milligrams against the label, and a published legal identity. The per-criterion evidence, with dates, is on each vendor's review page.
Is it legal to buy Thymosin Alpha-1?
Thymosin Alpha-1 is sold by these vendors as a research chemical for laboratory use, not for human consumption; none of it is FDA-approved in this form. Legality of purchase varies by jurisdiction and the compound, and it is your responsibility to know your local rules. Our pages assess documentation and pricing; they are not legal or medical advice.
How is this list ordered?
Rubric score first. Among equal scores, our editorial pick (Purgo Labs) comes first, then a short, named list of affiliate partners we choose to list first inside a tie, then the lower verified price per milligram at 10mg, then the larger independent review base. 8 of the 15 vendors here are partners. A partnership never changes a score and never moves a vendor above one with a higher score.
Is thymosin alpha-1 the same as TB-500?
No. Thymosin alpha-1 is a 28-residue peptide from prothymosin alpha; TB-500 is a short fragment of thymosin beta-4. They share the word thymosin and nothing else that matters. Check the certificate's stated molecular weight if the listing is ambiguous.
Why is thymosin alpha-1 more expensive than most research peptides?
Length. Synthesis cost and the chance of impurity both rise with the number of residues, and a 28-residue peptide is at the long end of what research vendors stock. Compare per milligram at the same size.