Best peptide vendors (Oct 2026), ranked on evidence
We rank research peptide vendors on what they can prove: who they are, whether they publish batch certificates of analysis (COAs) from named labs, how they handle payment and refunds, and what they charge. Updated Oct 15, 2026.
How this list works. Only live vendors with all six transparency checks completed are eligible, and we leave out any with documented red flags or named in an FDA warning letter, lawsuit or seizure in the past three years (66 of 205 we track qualify). No vendor can pay to be listed or to move up. We haven't published lab tests yet, so this ranking measures openness, not purity. Full methodology.
Top picks by category
| Category | Vendor | Why |
|---|---|---|
| Most transparent overall | Pure Peptide Labs | Highest score of any fully checked vendor: 90/100. |
| Best value among transparent vendors | Evolve BioPep | Scores 83/100, and its best prices are typically 29% below the median across 27 peptides. |
| Widest range with live prices | Volta Peptides | Live prices for 60 peptides, with a 70/100 score. |
| Longest track record | Particle Peptides | Domain registered 11.3 years ago; scores 83/100. |
| Top pick that ships to Canada | Coastal Peptides | Highest score (88/100) among vendors that name Canada in their shipping terms. All vendors that ship to Canada. |
| Top pick that ships to the UK | Particle Peptides | Highest score (83/100) among vendors that name the UK in their shipping terms. All vendors that ship to the UK. |
| Top pick that ships to the EU | Particle Peptides | Highest score (83/100) among vendors that name the EU in their shipping terms. All vendors that ship to the EU. |
| Top pick that ships to Australia | Lyze Labs | Highest score (75/100) among vendors that name Australia in their shipping terms. All vendors that ship to Australia. |
The 10 most transparent peptide vendors
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Pure Peptide Labs 90
90/100 on our six checks; prices typically 8% above the median across 44 peptides; ships to the US, and internationally. Full Pure Peptide Labs review.
- Publishes batch-specific certificates of analysis (COAs) from Freedom Diagnostics and Kovera Labs
- Names its company (Pure Peptide Labs LLC) and publishes a physical address
- Publishes shipping, refund and terms pages
- Accepts card payments, which carry buyer protection
-
Peptidology 90
90/100 on our six checks; prices typically 18% below the median across 3 peptides; ships to the US. Full Peptidology review.
- Publishes batch-specific certificates of analysis (COAs) from Vanguard Laboratory and TrustPointe Analytics
- Names its company (Nine of One LLC) and publishes a physical address
- Publishes shipping, refund and terms pages
- Accepts card payments, which carry buyer protection
-
Coastal Peptides 88
88/100 on our six checks; ships to the US and Canada. Full Coastal Peptides review.
- Publishes batch-specific certificates of analysis (COAs) from Chromate and Kovera Labs
- Domain registered 2.8 years ago
- Publishes shipping, refund and terms pages
- Accepts card payments, which carry buyer protection
- Publishes an address but no company name
-
Eros Peptides 87
87/100 on our six checks; prices typically 29% below the median across 14 peptides; ships to the US. Full Eros Peptides review.
- Names its company (Eros Peptides, LLC) and publishes a physical address
- Domain registered 3.4 years ago
- Publishes shipping, refund and terms pages
- Accepts card payments and PayPal, which carry buyer protection
- Publishes only generic or sample COAs, not batch-specific ones
-
Nationwide Peptides 85
85/100 on our six checks; prices typically 6% above the median across 38 peptides; ships to the US. Full Nationwide Peptides review.
- Publishes batch-specific certificates of analysis (COAs) from Freedom Diagnostics
- Names its company (NATIONAL SCIENCE LABS, LLC) and publishes a physical address
- Publishes shipping, refund and terms pages
- Accepts card payments, which carry buyer protection
- Domain registered only 11 months ago
-
Mile High Compounds 85
85/100 on our six checks; live prices for 2 peptides; ships to the US, and internationally. Full Mile High Compounds review.
- Publishes batch-specific certificates of analysis (COAs) from Freedom Diagnostics, Vanguard Laboratory, Chromate, Kovera Labs and ILS Laboratories
- Names its company (Mile High Compounds LLC) and publishes a physical address
- Accepts card payments, which carry buyer protection
- No shipping page found
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Go Alpha Labs 83
83/100 on our six checks; prices typically 8% above the median across 47 peptides; ships to the US. Full Go Alpha Labs review.
- Publishes batch-specific certificates of analysis (COAs) from Freedom Diagnostics
- Publishes shipping, refund and terms pages
- Accepts card payments, which carry buyer protection
- Publishes an address but no company name
-
Evolve BioPep 83
83/100 on our six checks; prices typically 29% below the median across 27 peptides; ships to the US, and internationally. Full Evolve BioPep review.
- Publishes batch-specific certificates of analysis (COAs) from Vanguard Laboratory, Chromate and ILS Laboratories
- Publishes shipping, refund and terms pages
- Accepts PayPal, which carries buyer protection
- Names its company (Evolve Bio Pep LLC) but publishes no physical address
-
Particle Peptides 83
83/100 on our six checks; prices typically 25% above the median across 9 peptides; ships to the UK and the EU, and internationally. Full Particle Peptides review.
- Publishes batch-specific certificates of analysis (COAs)
- Domain registered 11.3 years ago
- Publishes shipping, refund and terms pages
- Accepts card payments, which carry buyer protection
- Doesn't name an independent lab on its COAs
- Publishes an address but no company name
-
Pure Lab Peptides 82
82/100 on our six checks; prices typically 17% above the median across 59 peptides; ships to the US, and internationally. Full Pure Lab Peptides review.
- Names its company (PLP Research LLC) and publishes a physical address
- Domain registered 2.7 years ago
- Publishes shipping, refund and terms pages
- Accepts card payments, which carry buyer protection
- Publishes only generic or sample COAs, not batch-specific ones
Full ranking
| # | Vendor | Status | Transparency | Prices tracked | Price vs median |
|---|---|---|---|---|---|
| 1 | Pure Peptide Labs | 90 | 44 | +8% | |
| 2 | Peptidology | 90 | 3 | −18% | |
| 3 | Coastal Peptides | 88 | |||
| 4 | Eros Peptides | 87 | 14 | −29% | |
| 5 | Nationwide Peptides | 85 | 38 | +6% | |
| 6 | Mile High Compounds | 85 | 2 | ||
| 7 | Go Alpha Labs | 83 | 47 | +8% | |
| 8 | Evolve BioPep | 83 | 27 | −29% | |
| 9 | Particle Peptides | 83 | 9 | +25% | |
| 10 | Pure Lab Peptides | 82 | 59 | +17% | |
| 11 | Bluum Peptides | 82 | 3 | median | |
| 12 | Simple Peptide | 82 | |||
| 13 | Peptides World | 80 | 43 | +8% | |
| 14 | Hydro Research | 80 | 21 | median | |
| 15 | Virtus Peptides | 80 | 2 | ||
| 16 | Alpha Peps | 78 | 36 | −3% | |
| 17 | Excalibur Peptides | 78 | 5 | +16% | |
| 18 | Kimera Chems | 78 | |||
| 19 | Modern Aminos | 77 | 41 | −1% | |
| 20 | Protide Health | 75 | 42 | +42% | |
| 21 | Alpha Omega Peptide | 75 | 7 | −2% | |
| 22 | Lyze Labs | 75 | 5 | −58% | |
| 23 | Peak Lab Peptides | 73 | 29 | +3% | |
| 24 | Orbitrex Peptides | 73 | 25 | +6% | |
| 25 | ANKR Lab | 73 | 22 | +12% |
Live vendors with all six checks complete, no red flags and no recent enforcement action, by transparency score. Price vs median: typical best price compared with the market median.
Vendors we don't rank: red flags, enforcement actions and shutdowns
Each profile shows the evidence and the date we found it.
Red flags
- Amino Asylum (aminoasylumofficial.com): Domain registered May 19, 2026, after the original Amino Asylum closed (reported June 2025); no evidence it's the same business
- Paradigm Peptide (paradigm-peptide.com): Trades under a near-identical name to Paradigm Peptides, whose owners pleaded guilty to federal charges; domain registered Apr 22, 2025; the site says it is not affiliated
Named in regulatory or legal action (past three years)
Being named isn't a finding of wrongdoing about any particular product, but we don't recommend these vendors while the action is recent.
- Nuscience Peptides: FDA warning letter to NuScience Peptides LLC (Aug 24, 2026)
- Peptide Partners: FDA warning letter to Peptide Partners LLC (Aug 24, 2026)
- Royal Peptides: FDA warning letter to Royal Peptides LLC (Aug 24, 2026)
- Legendary Peptides: Eli Lilly sues six sellers over retatrutide (Aug 12, 2026)
- Prime Peptides: FDA warning letter to Prime Vitality, Inc. (Prime Peptides) (Dec 10, 2024)
- Swiss Chems: FDA warning letter to Swisschems (Dec 10, 2024)
- Xcel Peptides: FDA warning letter to Xcel Research LLC (Xcel Peptides) (Dec 10, 2024)
Shut down or offline
- Amino Asylum: shut down. Reported shut down after a June 2025 FDA raid, per secondary sources; no FDA or DOJ release found.
- Ascension Peptides: site down. Unreachable since at least Oct 14, 2026.
- Chameleon Peptides: shut down. Our check on Oct 15, 2026 found this on the homepage: "Chameleon Peptides is Closed Customer archive Chameleon Peptides is…".
- Core Peptides: site down. Unreachable since at least Oct 14, 2026.
- Dynotides: site down. Unreachable since at least Oct 14, 2026.
- Eternal Peptides: site down. The Internet Archive's last working copy of the store is dated Jun 1, 2026; its capture on Sep 20, 2026 recorded an HTTP 503 error. Unreachable since at least Oct 14, 2026.
- Paradigm Peptides: shut down. The owner and a co-defendant pleaded guilty on Dec 10, 2025 in the Northern District of Indiana to introducing unapproved drugs into interstate commerce; local news reports the owner was sentenced on Jul 30, 2026 to 70 months in prison. A newer, unaffiliated site using the name says the original store closed about two years ago.
- Peptide Sciences: shut down. Reported closed in March 2026 by several industry newsletters and directories; the domain now serves a bot-protection page, so we could not read the site.
- Peptides 4 Research: site down. Unreachable since at least Oct 14, 2026.
- PureRawz: shut down. PureRawz no longer sells research chemicals. Its site now describes itself as an informational and affiliate website that doesn't sell or supply the products it features, and its peptide pages link out to other vendors.
- Science.bio: shut down. Science.bio's homepage says it has permanently closed and discontinued research products; a community post dates the closure to Jan 27, 2026.
- Soma Chems: shut down. Our check on Oct 15, 2026 found this on the homepage: "Soma Chems Our store is no longer accepting new orders. Thanks for your support! Manage Orders Or…".
- Strate Labs: shut down. Community posts and a directory article report Strate Labs wound down around July 2026. Its domain stratelabs.is shows a registration date of Jul 10, 2026 although it was archived from Jul 22, 2025, so it was re-registered, and it now redirects to an unrelated store (glpeptides.is).
Track new closures, raids and FDA warning letters on our alerts page.
What a high rank doesn't mean
A transparent vendor can still ship a bad batch, and a new vendor can be honest. Use the score as a starting point, then check the vendor's latest COA yourself. Our guide on how to read a COA explains how.
Best peptide vendors: questions people ask
What is the best peptide vendor?
On public evidence, Pure Peptide Labs scores highest right now (90/100), followed by Peptidology (90/100). No public-information score can tell you what's in a particular vial, so treat the ranking as a shortlist and check each batch's COA.
Which peptide vendors are legit?
We don't certify vendors. What we can say: 30 live vendors of the 66 we fully checked and ranked score 70 or more, meaning they publish most of what a careful buyer should expect. 2 live sites carry documented red flags, such as look-alike names of closed brands. 7 active vendors were named in an FDA warning letter, lawsuit or seizure in the past three years. How to check a vendor yourself.
Which peptide vendors have third-party testing?
48 active vendors publish batch-specific certificates of analysis. See the third-party tested vendor list, including which labs each one uses.
What is the cheapest reliable peptide vendor?
Among vendors scoring 70 or more, Evolve BioPep has the lowest typical prices (29% below the median). Compare every vendor in our price ranking, or one peptide at a time in the price index.
Which peptide vendors ship to Canada, the UK, the EU or Australia?
See our regional lists: Canada (19), United Kingdom (7), European Union (8) and Australia (9). Counts include only vendors that name the region in their own shipping terms.
Why isn't a vendor I use on this list?
Only live vendors with all six checks completed, no documented red flags and no FDA warning letter, lawsuit or seizure naming them in the past three years are ranked: 66 of the 205 we track. Many vendors block automated checks, so we can't verify them yet. Every vendor still has a profile in the full vendor list. You can suggest one through our contact page.
Do vendors pay to be on this list?
No. Vendors can't pay for a rank, a review or removal, and affiliate deals, if we ever have any, never change the order. How we make money.
Cite or link to this page
Our data is free to reuse under CC BY 4.0. Please credit us with a link to this page.
Peptide Referee. (2026). Best peptide vendors (Oct 2026), ranked on evidence. Retrieved Oct 15, 2026, from https://peptidereferee.com/best-peptide-vendors/<a href="https://peptidereferee.com/best-peptide-vendors/">Best peptide vendors (Oct 2026), ranked on evidence</a> (Peptide Referee)