Best TB-500 Vendors (2026)
Where to buy TB-500 (also sold as Thymosin Beta-4 fragment, TB4): the 72 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.
- 1 certificate verified at the labout of stock 1 Nov10mg$49.99$39.99 with code
- 2 certificates verified at the lab10mg$25.00$20.00 with code
- 1 certificate verified at the lab10mg$49.99$29.99$26.99 with code
- 1 certificate verified at the lab10mg$68.57$48.00$43.20 with code
- 1 certificate verified at the lab10mg$49.99$42.49 with code
- 1 certificate verified at the lab10mg$75.00$67.50 with code
- MyPurePeptide10/10 · 1 NovBuy$2.50/mg$25 · 10mg · $20 with HEALTH
- Oneday Compounds10/10 · 29 OctBuy$3.00/mg$29.99 · 10mg · $26.99 with compoundreview
- Peptide Giants10/10 · 1 NovBuy$4.80/mg$48 · 10mg · $43.20 with health
- Purgo Labs10/10 · 1 NovBuy$5.00/mg$49.99 · 10mg · $39.99 with HEALTH
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 TB-500: 72 vendors, ranked
Reference size 10mg — the size most of these vendors sell. Other sizes we have on record are listed per vendor.
| # | Vendor | Rubric | 10mg price | Other sizes | Trustpilot | Buy |
|---|---|---|---|---|---|---|
| 1 | Purgo LabsPartner SteriGenix · Freedom Diagnostics | 10/10 | $49.99 ($5.00/mg · 1 Nov 2026 · list price; HALLOWEEN30 code banner (30% off) shown, 10-packs excluded, applied automatically on the product page; sold out when checked; sold out when checked) | — | 4.8 (101 reviews) | Buy 20% off every order · $39.99 with code |
| 2 | MyPurePeptidePartner Janoshik Analytical | 10/10 | $25.00 ($2.50/mg · 1 Nov 2026 · list price, no struck price shown) | — | 4.8 (247 reviews) | Buy 20% off · $20.00 with code |
| 3 | Oneday CompoundsPartner ILS Laboratories (San Diego, CA) | 10/10 | $29.99 ($3.00/mg · 29 Oct 2026 · sale; list $49.99 struck (BY ONEDAY rebrand, 40% off sitewide); read logged in) | — | 4.8 (88 reviews) | Buy 10% off · $26.99 with code |
| 4 | Peptide GiantsPartner Janoshik Analytical · Vanguard Laboratory | 10/10 | $48.00 ($4.80/mg · 1 Nov 2026 · sale; list $68.57 struck) | 5mg $29.99 | 4.6 (65 reviews) | Buy 10% off · $43.20 with code |
| 5 | Panda Peptides Janoshik Analytical · ILS Labs (per batch) | 10/10 | $39.99 ($4.00/mg · 25 Oct 2026 · read 25 October 2026; sale; list $44.99 struck) | 5mg $24.99 | 4.7 (85 reviews) | Visit |
| 6 | Idun Peptides Kovera Labs (named in certificate captions only) | 10/10 | $44.99 ($4.50/mg · 5 Sep 2026) | — | 4.9 (181 reviews) | Visit |
| 7 | Rivn PeptidesPartner Freedom Diagnostics | 9/10 | $49.99 ($5.00/mg · 15 Oct 2026 · Store API; listed by name; shown against $50 (a cent off, not a sale)) | — | 4.9 (641 reviews) | Buy 15% off · $42.49 with code |
| 8 | Ameano PeptidesPartner Janoshik Analytical | 9/10 | $75.00 ($7.50/mg · 1 Nov 2026 · list price, no struck price shown) | — | 4.8 (535 reviews) | Buy 10% off · $67.50 with code |
| 9 | Amino ClubPartner ILS Labs | 9/10 | $39.99 ($4.00/mg · 2 Oct 2026 · list price; FALL40 code banner (40% off) shown, not applied) | — | 4.6 (603 reviews) | Buy 20% off · $31.99 with code |
| 10 | Modified AminosPartner Ethos Analytics | 9/10 | $39.99 ($4.00/mg · 29 Sep 2026 · lot MA-TB5I-100) | — | 4.8 (302 reviews) | Buy 10% off · $35.99 with code |
| 11 | Snap PeptidesPartner Kovera Labs | 9/10 | $49.00 ($4.90/mg · 27 Oct 2026 · sold as TB-500 (TB-4); '8X tested' badge) | — | 4.9 (88 reviews) | Buy 10% off · $44.10 with code |
| 12 | Pure Peptides Kovera Labs | 9/10 | $60.00 ($6.00/mg · 10 Oct 2026 · listed by name; multi-vial 5%/10% not applied) | 5mg $30.00 | profile removed | Visit |
| 13 | Oath Research Freedom Diagnostics | 9/10 | $90.00 ($9.00/mg · 1 Nov 2026 · read 1 November 2026; sale; list $120 struck) | 5mg $60.00 | 4.6 (33 reviews) | Visit |
| 14 | Pure Lab Peptides Chromate | 9/10 | $139.99 ($14.00/mg · 24 Oct 2026 · read 24 Oct 2026) | — | profile removed | Visit |
| 15 | PS PeptidesPartner North American Diagnostics | 8/10 | $79.99 ($8.00/mg · 1 Nov 2026 · list price, no struck price shown) | — | 4.3 (223 reviews) | Buy 10% off · $71.99 with code |
| 16 | EZ PeptidesPartner Janoshik Analytical | 8/10 | $68.00 ($6.80/mg · 1 Nov 2026 · list price, no struck price shown) | — | profile removed | Buy 10% off · $61.20 with code |
| 17 | Offline PeptidesPartner Freedom Diagnostics | 8/10 | $56.00 ($5.60/mg · 29 Sep 2026) | 5mg $36.00 | 4.8 (104 reviews) | Buy 10% off · $50.40 with code |
| 18 | BioLongevity LabsPartner SafeCert Labs · MDx BioAnalytical · BioRegen | 8/10 | $164.97 ($16.50/mg · 2 Oct 2026 · list price; September 40%-off sale ended, no struck price shown) | — | profile removed | Visit |
| 19 | Amplified LabsPartner Freedom Diagnostics · Bioviridian | 8/10 | $50.00 ($5.00/mg · 28 Oct 2026) | 5mg $32.00 | 4.9 (94 Google reviews) | Buy 15% off · $42.50 with code |
| 20 | Blue Ridge PeptidesPartner Freedom Diagnostics | 8/10 | $45.00 ($4.50/mg · 27 Oct 2026 · list $50; sold as TB-500 (TB4)) | — | 4.8 (88 reviews) | Buy 10% off · $40.50 with code |
| 21 | Nexaph Janoshik Analytical | 8/10 | $16.10 ($1.61/mg · 26 Oct 2026 · Store API; sold as 'TB500 Frag 17-23 10mg (10 vials/kit)' $161.00/kit on sale, regular $188.00; per-vial = kit ÷ 10) | — | 3.9 (73 reviews) | Visit |
| 22 | Crush Research ILS Laboratories (also Freedom Diagnostics, Vanguard Laboratory, BTLabs) | 8/10 | $39.00 ($3.90/mg · 31 Oct 2026 · single vial, out of stock; read from the product page, https://crushresearch.com/product/tb-500-10mg-vial) | 5mg $29.00 | 4.4 (30 reviews) | Visit |
| 23 | Everest Peptides Freedom Diagnostics | 8/10 | $44.99 ($4.50/mg · 2 Oct 2026 · sale; list $59.99 struck (25% off)) 10% since 5 Sep | — | 4.8 (62 reviews) | Visit |
| 24 | Modern Research Peptides Freedom Diagnostics | 8/10 | $46.99 ($4.70/mg · 29 Sep 2026 · title prints measured 11.58mg) | 5mg $34.27 | 4.2 (19 reviews) | Visit |
| 25 | Oros Research Ethos Analytics | 8/10 | $59.99 ($6.00/mg · 29 Sep 2026) | 5mg $29.99 | 4.9 (487 reviews) | Visit |
| 26 | Nova Peptides Freedom Diagnostics | 8/10 | $59.99 ($6.00/mg · 29 Sep 2026) | 5mg $34.99 | 4.8 (73 reviews) | Visit |
| 27 | Honest Peptide Freedom Diagnostics (on certificates) | 8/10 | $63.00 ($6.30/mg · 2 Oct 2026 · read from served product page; 21+ age overlay not accepted) | — | 4.6 (51 reviews) | Visit |
| 28 | LuvionBio Freedom Diagnostics | 8/10 | $64.99 ($6.50/mg · 29 Sep 2026 · read through a registered account) | 5mg $39.99 | 4.7 (146 reviews) | Visit |
| 29 | Prime Peptides Freedom Diagnostics (also Kovera Labs, Horizon Analytical) | 8/10 | $65.00 ($6.50/mg · 10 Oct 2026 · Store API; listed by name) | — | profile removed | Visit |
| 30 | Petratide Science ILS Labs | 8/10 | not sold at 10mg | 5mg $34.95 | 4.2 (41 reviews) | Visit |
| 31 | Protide Health Freedom Diagnostics | 8/10 | $85.00 ($8.50/mg · 21 Oct 2026 · tile price on the BPC-157 page) | — | profile removed | Visit |
| 32 | Northline Labs Horizon Analytical (on certificates) | 8/10 | $99.99 ($10.00/mg · 2 Oct 2026) | — | 4.3 (514 reviews) | Visit |
| 33 | Modern AminosPartner Freedom Diagnostics (on certificate) · Kovera · Vanguard · Chromate · TrustPointe (claimed) | 7/10 | $59.00 ($5.90/mg · 1 Nov 2026 · list price, no struck price shown) | 5mg $34.00 | profile removed | Visit $30 off via our link |
| 34 | Apex PeptidesPartner Freedom Diagnostics | 7/10 | $95.00 ($9.50/mg · 2 Oct 2026 · site header shows 'TEMPORARILY CLOSED' though add-to-cart is enabled | site header reads 'TEMPORARILY CLOSED' on 2 Oct 2026; recorded as unavailable pending a re-read; sold out when checked) | — | profile removed | Visit |
| 35 | True PeptidesPartner Optiq Health Labs | 7/10 | $61.00 ($6.10/mg · 1 Oct 2026 · backorder) | — | no record | Buy 10% off · $54.90 with code |
| 36 | ZC LabsPartner ILS Laboratories + Freedom Diagnostics | 7/10 | $41.99 ($4.20/mg · 1 Nov 2026 · read 1 November 2026; sale; list $44.99 struck; BOGO on single vials active when read) | — | 3.8 (2 reviews) | Buy 10% off single vials · $37.79 with code |
| 37 | Peptide PartnersPartner TrustPointe Analytics, Chromate, Kovera Labs, BioRegen (certificate ledger) | 7/10 | $65.00 ($6.50/mg · 24 Oct 2026 · Store API; 2×10mg pack $130; packs only) | — | profile removed | Buy 10% off · $58.50 with code |
| 38 | Kylo PeptidesPartner Freedom Diagnostics, Janoshik Analytical, Vanguard Laboratory, Optiq Health Labs (COA table) | 7/10 | $69.95 ($7.00/mg · 24 Oct 2026 · Store API) | — | 3.6 (4 reviews) | Visit |
| 39 | Peptira Freedom Diagnostics | 7/10 | $25.48 ($2.55/mg · 26 Oct 2026 · smallest size; 'UP TO 50% OFF SITEWIDE' banner, list $39.20 struck) 48% since 18 Sep | — | profile removed | Visit |
| 40 | Value Research Labs Horizon Analytical (also ILS Laboratories) | 7/10 | $27.99 ($2.80/mg · 31 Oct 2026 · sale; list $39.99 struck; BOGO + 30% sitewide; read from the store API, https://valueresearchlabs.com/product/tb-500/) | — | 4.6 (451 reviews) | Visit |
| 41 | Instant Peptides Kovera Labs · Freedom Diagnostics | 7/10 | $45.95 ($4.60/mg · 2 Oct 2026 · list price, no struck price shown) 8% since 6 Sep | — | profile removed | Visit |
| 42 | AIO Peptides Freedom Diagnostics | 7/10 | $49.50 ($4.95/mg · 1 Oct 2026 · logged in; 25% sitewide sale, list $66.00 struck; lot AIOTB326 on the COA page) | — | profile removed | Visit |
| 43 | Midwest Peptide Precision Mass Spec (on certificates) | 7/10 | $49.99 ($5.00/mg · 2 Oct 2026 · read from product page structured data; researcher-verification overlay not accepted) | — | 4.9 (335 reviews) | Visit |
| 44 | Evo Labs Research Janoshik Analytical · Kovera Labs | 7/10 | $49.99 ($5.00/mg · 2 Oct 2026 · list price; FALL20 code banner shown, not applied) | — | profile removed | Visit |
| 45 | NeuroLabs Research Freedom Diagnostics | 7/10 | $52.73 ($5.27/mg · 2 Oct 2026 · single-vial price from served product page; 21+ overlay not accepted) 10% since 5 Sep | — | 4.3 (61 reviews) | Visit |
| 46 | Profound Aminos Janoshik Analytical | 7/10 | $55.00 ($5.50/mg · 2 Oct 2026) | 5mg $33.00 | 4.6 (280 reviews) | Visit |
| 47 | Global Aminos Freedom Diagnostics (on certificates) | 7/10 | $56.09 ($5.61/mg · 2 Oct 2026 · sale; list $65.99 struck; read from served product page; 21+ age overlay not accepted) 42% since 5 Sep | — | 4.7 (40 reviews) | Visit |
| 48 | Mile High Compounds Kovera Labs · Chromate | 7/10 | $59.99 ($6.00/mg · 11 Sep 2026 · sale price; list $69.99) | — | profile removed | Visit |
| 49 | BioGenix Peptides Horizon Analytical | 7/10 | $64.00 ($6.40/mg · 29 Sep 2026) | — | 4.8 (140 reviews) | Visit |
| 50 | Prime Lab Peptides Freedom Diagnostics | 7/10 | $70.00 ($7.00/mg · 30 Oct 2026 · sale; list $92.5 struck; read from https://primelabpeptides.com/products/tb-500-10mg) | 5mg $45.00 | profile removed | Visit |
| 51 | Accelerate Labs Vanguard Laboratory + Freedom Diagnostics | 7/10 | not sold at 10mg | 5mg $44.99 | 4.4 (195 reviews) | Visit |
| 52 | Arizen BioLabsPartner Janoshik (on certificates) | 6/10 | $79.99 ($8.00/mg · 2 Oct 2026 · list price; FALL30 code (30% off) shown, not applied) | — | 4.8 (44 reviews) | Buy 10% off · $71.99 with code |
| 53 | Elite Edge BiotechPartner Baler Lab | 6/10 | $38.00 ($3.80/mg · 1 Nov 2026 · sale; list $76 struck) | — | 4.8 (176 reviews) | Buy 10% off · $34.20 with code |
| 54 | Glacier Aminos Ethos Analytics (on certificates) | 6/10 | $58.99 ($5.90/mg · 5 Sep 2026 · read via public store API) | — | 4.7 (118 reviews) | Visit |
| 55 | AMC Essentials | 6/10 | $64.99 ($6.50/mg · 11 Sep 2026) | — | 4.9 (310 reviews) | Visit |
| 56 | Optima Supply Janoshik Analytical · Chromate Labs · ILS-Lab | 6/10 | $65.00 ($6.50/mg · 5 Sep 2026) | — | profile removed | Visit |
| 57 | Blue Sky Peptide MZ Biolabs (on certificates) | 6/10 | not sold at 10mg | 2mg $19.77 · 5mg $43.97 | profile removed | Visit |
| 58 | Direct Peptides Horizon Analytical | 6/10 | $99.00 ($9.90/mg · 2 Oct 2026 · product URL discovered (manifest had homepage)) | — | profile removed | Visit |
| 59 | Biotech Peptides MZ Biolabs | 6/10 | $124.00 ($12.40/mg · 2 Oct 2026 · product URL discovered (manifest had shop page)) | — | profile removed | Visit |
| 60 | Peptide Pros MZ Biolabs (on certificates) | 6/10 | not sold at 10mg | 2mg $37.25 | profile removed | Visit |
| 61 | Peak Lab PeptidesPartner Bioviridian (on certificates) | 5/10 | $54.00 ($5.40/mg · 25 Oct 2026 · read 25 October 2026; sale; list $67.00 struck) | 5mg $38.00 | profile removed | Visit |
| 62 | Lost Coast Aminos BTLabs (on certificates) | 5/10 | $30.00 ($3.00/mg · 2 Oct 2026 · sale; list $44 struck; out of stock (no add-to-cart); sold out when checked) 12% since 5 Sep | — | 4.7 (38 reviews) | Visit |
| 63 | Valor Peptides Accumark Labs (on certificates) | 5/10 | $49.99 ($5.00/mg · 9 Oct 2026 · Store API) | — | 4.1 (33 reviews) | Visit |
| 64 | BioEdge Research Labs | 5/10 | $67.00 ($6.70/mg · 11 Sep 2026 · sold as 'TB4 (TB500)') | — | 4.5 (15 reviews) | Visit |
| 65 | Ascension Peptides Kovera Labs · MZ Biolabs | 5/10 | not sold at 10mg | 5mg $54.00 | profile removed | Visit |
| 66 | Elite Peptides | 4/10 | not sold at 10mg | 5mg $34.99 | 4.0 (8 reviews) | Visit |
| 67 | Astro Peptides | 4/10 | $90.00 ($9.00/mg · 1 Nov 2026 · read 1 November 2026; sale; list $140 struck) | 5mg $50.00 | 3.0 (173 reviews) | Visit |
| 68 | Swiss Chems Janoshik Analytical | 4/10 | not sold at 10mg | 2mg $23.96 | profile removed | Visit |
| 69 | Ascend Amino | 3/10 | $50.00 ($5.00/mg · 2 Oct 2026 · sold as TB500 10mg) | — | 4.6 (37 reviews) | Visit |
| 70 | Atomik Labz | 2/10 | $65.00 ($6.50/mg · 11 Sep 2026 · store feed; product pages require login) | 20mg $140.00 | 2.7 (34 reviews) | Visit |
| 71 | Polaris Peptides | 2/10 | $70.00 ($7.00/mg · 6 Sep 2026 · public store API) | — | 4.2 (35 reviews) | Visit |
| 72 | FelixChem (Felix Chemical Supply) | 2/10 | $70.00 ($7.00/mg · 11 Sep 2026 · store feed; product pages redirect to registration) | — | 3.5 (2 reviews) | Visit |
What makes TB-500 different to source
TB-500 is sold by almost every research-peptide vendor, usually next to BPC-157 and often as a blend with it. Universal availability cuts both ways: the compound is easy to find, and the field includes vendors with no independent review record and certificates that never leave the vendor's own site.
The name itself is worth understanding before you buy. TB-500 is a synthetic fragment of thymosin beta-4 (residues 17–23, the actin-binding region), not the full 43-amino-acid protein. Some vendors label the product 'thymosin beta-4' or 'TB4' while shipping the fragment; a certificate that states the sequence or a molecular weight near 890 Da resolves the ambiguity. Full-length thymosin beta-4 has a molecular weight near 4,963 Da and is rarely what is sold.
Because so many vendors carry it, TB-500 is one of the compounds where documentation and price can be compared directly across the field. That is what the table above does: the same rubric for every vendor, and a product-page price with a date for each.
The top 3, explained
Purgo Labs
10/10Affiliate partnerWhat we can verify
Publishes per-lot COAs naming the testing laboratory — SteriGenix and Freedom Diagnostics — with lot numbers, test dates, measured net peptide content and direct verify-at-lab links. HPLC and mass spectrometry testing, US-based fulfilment from Scottsdale, Arizona, same-day dispatch on weekday orders before 2PM EST, and a 60-day money-back guarantee.
Net content: Measured net peptide published per lot (e.g. BPC-157 lot PL-BPC-05: 11.16mg vs 10mg label)
Where it falls short
Smaller independent review base than several competitors (101 reviews). The catalog is peptide-focused, so researchers also working with SARMs or broader research chemicals will need a second supplier.
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.
Purgo Labs for TB-500
Purgo Labs sits at #1 of 72 on this page: 10/10 on the rubric, 10mg at $49.99 read 1 Nov 2026. Code HEALTH gives 20% off every order. We earn a commission; it did not decide the order above.
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 TB-500 — frequently asked
Where can I buy TB-500?
As of 1 Nov 2026, 72 of the 105 vendors on our scoreboard list TB-500 with a price we have read on the product page: Purgo Labs, MyPurePeptide, Oneday Compounds, Peptide Giants, Panda Peptides, Idun Peptides, Rivn Peptides, Ameano Peptides, Amino Club, Modified Aminos, Snap Peptides, Pure Peptides, Oath Research, Pure Lab Peptides, PS Peptides, EZ Peptides, Offline Peptides, BioLongevity Labs, Amplified Labs, Blue Ridge Peptides, Nexaph, Crush Research, Everest Peptides, Modern Research Peptides, Oros Research, Nova Peptides, Honest Peptide, LuvionBio, Prime Peptides, Petratide Science, Protide Health, Northline Labs, Modern Aminos, Apex Peptides, True Peptides, ZC Labs, Peptide Partners, Kylo Peptides, Peptira, Value Research Labs, Instant Peptides, AIO Peptides, Midwest Peptide, Evo Labs Research, NeuroLabs Research, Profound Aminos, Global Aminos, Mile High Compounds, BioGenix Peptides, Prime Lab Peptides, Accelerate Labs, Arizen BioLabs, Elite Edge Biotech, Glacier Aminos, AMC Essentials, Optima Supply, Blue Sky Peptide, Direct Peptides, Biotech Peptides, Peptide Pros, Peak Lab Peptides, Lost Coast Aminos, Valor Peptides, BioEdge Research Labs, Ascension Peptides, Elite Peptides, Astro Peptides, Swiss Chems, Ascend Amino, Atomik Labz, Polaris Peptides, FelixChem (Felix Chemical Supply). 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 TB-500?
At the 10mg size, the lowest price we have on record is Nexaph at $16.10 (read 26 Oct 2026) — Store API; sold as 'TB500 Frag 17-23 10mg (10 vials/kit)' $161.00/kit on sale, regular $188.00; per-vial = kit ÷ 10. It scores 8/10 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 TB-500 vendor has the best documentation?
Purgo Labs, MyPurePeptide, Oneday Compounds, Peptide Giants, Panda Peptides, Idun 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 TB-500?
TB-500 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. 24 of the 72 vendors here are partners. A partnership never changes a score and never moves a vendor above one with a higher score.
Is TB-500 the same as thymosin beta-4?
No. TB-500 is a short synthetic fragment of thymosin beta-4 covering its actin-binding region; the full protein is 43 amino acids. Vendors sometimes use the names interchangeably. A certificate that reports the sequence or a molecular weight near 890 Da tells you which one you have.
Should I buy TB-500 alone or as a BPC-157 blend?
It depends on the research design. A blend fixes the ratio between the two peptides, which suits a protocol that uses both at a set proportion and complicates one that needs to vary either. Single-compound vials from a documented vendor are the more flexible starting point; the same vendors on this page generally sell the blend as well.