Overall findings
Most lab-test failures
Vendors with the most tested samples showing at least one problem.
Investigate 3,071 peptide vendors.
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253 VeloPep Labs, LLC Explore test results Seller type not reviewed No buyer reviews indexed 55Unique reports 2026-09-29Latest test date1+ year COA history 2% underdosed0% low purity 26 29
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252 ANKR Explore test results Seller type not reviewed No buyer reviews indexed 55Unique reports 2026-09-21Latest test date< 1 year COA history 7% underdosed0% low purity 29 26
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254 FSD Explore test results Seller type not reviewed 256 buyer reviews 55Unique reports 2026-07-13Latest test date1+ year COA history 5% underdosed0% low purity 17 38
Lab evidence
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249 PTA Explore test results Seller type not reviewed No buyer reviews indexed 55Unique reports 2026-07-02Latest test date< 1 year COA history 40% underdosed0% low purity 55 0
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250 Shanghai Oudaxin New Material Technology Center Explore test results Seller type not reviewed No buyer reviews indexed 55Unique reports 2026-04-23Latest test date1+ year COA history 2% low purity 49 6
Lab evidence
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256 MEDI PHARMA Explore test results Seller type not reviewed No buyer reviews indexed 55Unique reports 2025-11-27Latest test date5+ years COA history 0% underdosed60% low purity 1 54
Lab evidence
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262 Lost Coast Aminos Explore test results Seller type not reviewed No buyer reviews indexed 54Unique reports 2026-10-15Latest test date1+ year COA history 2% underdosed2% low purity 10 44
Lab evidence
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257 CRC Explore test results Seller type not reviewed No buyer reviews indexed 54Unique reports 2026-06-27Latest test date< 1 year COA history 3% underdosed0% low purity 54 0
Lab evidence
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258 RNS Explore test results Seller type not reviewed No buyer reviews indexed 54Unique reports 2026-06-12Latest test date< 1 year COA history 0% low purity 54 0
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261 Life Link Research Explore test results Seller type not reviewed No buyer reviews indexed 54Unique reports 2026-05-05Latest test date2+ years COA history 0% underdosed0% low purity 18 36
Lab evidence
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259 Tri Vial BioWorks Explore test results Seller type not reviewed No buyer reviews indexed 54Unique reports 2026-03-11Latest test date< 1 year COA history 10% underdosed0% low purity 54 0
Lab evidence
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260 Empower Peptides Explore test results Seller type not reviewed No buyer reviews indexed 54Unique reports 2025-10-18Latest test date1+ year COA history 2% underdosed2% low purity 54 0
Lab evidence
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266 Better Peptide Explore test results Seller type not reviewed No buyer reviews indexed 53Unique reports 2026-10-20Latest test date1+ year COA history 5% underdosed0% low purity 18 35
Lab evidence
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268 Forge BioLab Explore test results Seller type not reviewed No buyer reviews indexed 53Unique reports 2026-10-16Latest test date1+ year COA history 5% underdosed0% low purity 0 53
Lab evidence
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263 Holas Explore test results Seller type not reviewed No buyer reviews indexed 53Unique reports 2026-09-16Latest test date< 1 year COA history 0% underdosed0% low purity 42 11
Lab evidence
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264 Peptide Source Explore test results Seller type not reviewed No buyer reviews indexed 53Unique reports 2026-08-17Latest test date3+ years COA history 7% underdosed0% low purity 40 13
Lab evidence
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265 JAG Biolabs Explore test results Seller type not reviewed No buyer reviews indexed 53Unique reports 2026-08-17Latest test date< 1 year COA history 0% underdosed0% low purity 29 24
Lab evidence
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267 Eros Labs Explore test results Seller type not reviewed No buyer reviews indexed 53Unique reports 2026-03-19Latest test date2+ years COA history 0% underdosed0% low purity 10 43
Lab evidence
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272 Swiss Chems Explore test results Seller type not reviewed No buyer reviews indexed 52Unique reports 2026-10-16Latest test date1+ year COA history 0% underdosed10% low purity 10 42
Lab evidence
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270 Zhuoyan Lab Explore test results Seller type not reviewed No buyer reviews indexed 52Unique reports 2026-09-30Latest test date1+ year COA history 2% low purity 39 13
Lab evidence
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269 Synagenics LLC Explore test results Seller type not reviewed No buyer reviews indexed 52Unique reports 2026-08-25Latest test date1+ year COA history 4% underdosed0% low purity 49 3
Lab evidence
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271 www.innopeptide.com Explore test results Seller type not reviewed No buyer reviews indexed 52Unique reports 2026-08-14Latest test date1+ year COA history 3% underdosed0% low purity 21 31
Lab evidence
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280 Gammapeps Explore test results Seller type not reviewed No buyer reviews indexed 51Unique reports 2026-10-16Latest test date< 1 year COA history 2% underdosed0% low purity 12 39
Lab evidence
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277 Cellupep Explore test results Seller type not reviewed No buyer reviews indexed 51Unique reports 2026-10-14Latest test date1+ year COA history 0% underdosed4% low purity 30 21
Lab evidence
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275 Mycelialink Explore test results Seller type not reviewed No buyer reviews indexed 51Unique reports 2026-10-01Latest test date< 1 year COA history 0% underdosed2% low purity 35 16
Lab evidence
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279 Go Peptides Explore test results Seller type not reviewed No buyer reviews indexed 51Unique reports 2026-09-28Latest test date< 1 year COA history 0% underdosed0% low purity 25 26
Lab evidence
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278 Pure Amino Labs Explore test results Seller type not reviewed No buyer reviews indexed 51Unique reports 2026-09-27Latest test date< 1 year COA history 13% underdosed0% low purity 28 23
Lab evidence
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274 Welon Peptide Solutions Explore test results Seller type not reviewed No buyer reviews indexed 51Unique reports 2026-09-14Latest test date< 1 year COA history 2% low purity 39 12
Lab evidence
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276 Total Optimize Explore test results Seller type not reviewed No buyer reviews indexed 51Unique reports 2026-09-06Latest test date< 1 year COA history 0% underdosed0% low purity 31 20
Lab evidence
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273 Supernova Peptides Explore test results Seller type not reviewed No buyer reviews indexed 51Unique reports 2026-03-25Latest test date1+ year COA history 0% underdosed11% low purity 48 3
Lab evidence
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285 Bliss Point Labs Explore test results Seller type not reviewed No buyer reviews indexed 50Unique reports 2026-10-17Latest test date< 1 year COA history 0% underdosed0% low purity 36 14
Lab evidence
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289 Evergreen Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 50Unique reports 2026-10-17Latest test date< 1 year COA history 5% underdosed0% low purity 15 35
Lab evidence
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287 New Beginning Peptides Explore test results Seller type not reviewed No buyer reviews indexed 50Unique reports 2026-10-14Latest test date< 1 year COA history 12% underdosed0% low purity 22 28
Lab evidence
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288 LCN — Laicuinuo Lcn Explore test results Seller type not reviewed No buyer reviews indexed 50Unique reports 2026-10-05Latest test date1+ year COA history 0% low purity 19 31
Lab evidence
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286 Peptide Pure Explore test results Seller type not reviewed No buyer reviews indexed 50Unique reports 2026-09-16Latest test date< 1 year COA history 12% underdosed0% low purity 24 26
Lab evidence
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282 Soma Alchemy Explore test results Seller type not reviewed No buyer reviews indexed 50Unique reports 2026-08-05Latest test date1+ year COA history 13% underdosed2% low purity 45 5
Lab evidence
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284 Redacted Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 50Unique reports 2026-07-05Latest test date< 1 year COA history 10% underdosed0% low purity 39 11
Lab evidence
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290 F40 Biotech Explore test results Seller type not reviewed No buyer reviews indexed 50Unique reports 2025-12-19Latest test date1+ year COA history 9% underdosed33% low purity 0 50
Lab evidence
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281 Coastal Peptides Explore test results Seller type not reviewed No buyer reviews indexed 50Unique reports 2025-11-07Latest test date1+ year COA history 5% low purity 50 0
Lab evidence
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283 Mint Anabolics Explore test results Seller type not reviewed No buyer reviews indexed 50Unique reports 2024-10-30Latest test date2+ years COA history Fewer than 5 applicable tests 42 8
Lab evidence
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294 Jack Jack Peptides Explore test results Seller type not reviewed No buyer reviews indexed 49Unique reports 2026-10-14Latest test date< 1 year COA history 5% underdosed0% low purity 25 24
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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295 Marvel Pep Explore test results Seller type not reviewed No buyer reviews indexed 49Unique reports 2026-10-05Latest test date1+ year COA history 0% low purity 17 32
Lab evidence
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293 Cactus Peptides Explore test results Seller type not reviewed No buyer reviews indexed 49Unique reports 2026-08-09Latest test date1+ year COA history 4% underdosed2% low purity 41 8
Lab evidence
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291 RxWellhealth LLC Explore test results Seller type not reviewed No buyer reviews indexed 49Unique reports 2026-06-04Latest test date< 1 year COA history 3% underdosed0% low purity 49 0
Lab evidence
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292 OROS Research (OROS, Inc.) Explore test results Seller type not reviewed No buyer reviews indexed 49Unique reports 2026-03-31Latest test date1+ year COA history 0% underdosed0% low purity 48 1
Lab evidence
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297 Huayi Biotechnology Explore test results Seller type not reviewed No buyer reviews indexed 48Unique reports 2026-10-06Latest test date1+ year COA history 0% low purity1 endotoxin failure 42 6
Lab evidence
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302 Tianjin Eleli Technology Development Explore test results Seller type not reviewed No buyer reviews indexed 48Unique reports 2026-10-06Latest test date< 1 year COA history 5% low purity 19 29
Lab evidence
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301 Bio Point Peptides Explore test results Seller type not reviewed No buyer reviews indexed 48Unique reports 2026-09-27Latest test date< 1 year COA history 17% underdosed0% low purity 21 27
Lab evidence
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303 Vorilabs Explore test results Seller type not reviewed No buyer reviews indexed 48Unique reports 2026-09-25Latest test date< 1 year COA history 3% underdosed0% low purity 0 48
Lab evidence
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300 STYX Peptides Explore test results Seller type not reviewed No buyer reviews indexed 48Unique reports 2026-08-25Latest test date< 1 year COA history 5% underdosed2% low purity 29 19
Lab evidence
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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.
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More reports means more evidence to inspect, not better quality. Each report counts once. Purity and amount percentages require at least five applicable results; explicit endotoxin failures are always shown. Missing measurements are not passes.
Understand the coverage
- Published COA report entries
- 120,993
- Ranked vendors across all seller groups
- 3,071
- Index refresh
Report dates are shown with each test. International classification does not establish factory ownership. U.S. resale does not establish U.S. manufacture.
The first 20 identities in each seller group’s original report-count ranking are shown to signed-in members. Changing the sort order does not change access. Vendors ranked 21 and below in those rankings remain named.
- International vendors
- 30 reviewed vendors · 7,704 unique reports · 19 observed in 30 days
- Compare manufacturers, exporters and other international sellers by their independent lab reports.
- Domestic resellers
- 102 reviewed vendors · 17,264 unique reports · 41 observed in 30 days
- Compare U.S.-based resellers. The seller is domestic; the product may still come from an overseas supplier.
- Seller type not reviewed
- 2,939 vendors · 57,121 unique reports · 363 observed in 30 days
- Sellers with independent lab reports whose seller type we have not reviewed yet.
Each report counts once, even when it tests several compounds or appears in multiple archives. Purity and dose results describe submitted samples, not everything a vendor sells. The methodology and known limitations explain eligibility and exclusions.
Explore recorded findings and compound comparisons
What is a domestic reseller?
A reseller buys from another supplier and sells under its own storefront or brand. Here, domestic means U.S.-based. Local shipping does not mean the product was made in the U.S. or tested after resale. Check the report for the actual batch.
Follow the evidence
Where the tests went wrong.
Recorded failures alongside the number of applicable tests. Choose a seller group to see the results behind each count.
Contamination findings
Failed endotoxin tests
Compare repeated failures in tests for bacterial endotoxins.
Below 97% purity
Low purity results
Vendors with the most measured purity results below 97%.
At least 10% short
Underfilled samples
See where tests found less compound than the stated amount.
Identity findings
Compound not found
Vendors with the most results that did not find the labeled compound.
What these counts include
All available results in the lab-findings comparisons. Each category counts only applicable tests; missing measurements do not count as passes. One sample can appear in several categories, but counts once in the overall total. These are counts of tested samples, not failure rates for everything a vendor sells.
International vendors: Recorded lab dates 2022-06-24 to 2026-10-20. 24 measured results have no usable date.
Domestic resellers: Recorded lab dates 2020-01-31 to 2026-10-22. 143 measured results have no usable date.
Choose your compound
Compare lab results
by compound.
Explore measured results, compare vendors and open their lab reports. These figures cover the same reviewed seller groups as the findings above.
GLP-1 and related compounds
RetatrutideLab results by vendor↗ International vendors1,779 measured results11.2–100% purity in 1,714 results Domestic resellers2,067 measured results33.7–100% purity in 1,915 results TirzepatideLab results by vendor↗ International vendors1,282 measured results40.4–100% purity in 1,248 results Domestic resellers1,436 measured results55.9–100% purity in 1,332 resultsGrowth hormone and related compounds
HGHLab results by vendor↗ International vendors79 measured results90.45–99.9% purity in 76 results Domestic resellers9 measured results96.14–99.84% purity in 9 results TesamorelinLab results by vendor↗ International vendors400 measured results12.7–100% purity in 380 results Domestic resellers582 measured results48.94–99.99% purity in 525 resultsRanges include measured purity above 0%. “Compound not found” is counted separately. The report library has broader coverage; vendor rankings apply their own minimum test counts.
Beyond the lab
What was it like to order?
Buyer reviews cover delivery, communication and service. Each keeps its date and source.