Overall findings
Most lab-test failures
Vendors with the most tested samples showing at least one problem.
Investigate 3,071 peptide vendors.
Review testing histories, buyer reports and recorded concerns in one directory.
606 Akro Research Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-05-31Latest test date< 1 year COA history 10% underdosed0% low purity 6 19
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584 Fire Peptides Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-05-20Latest test date1+ year COA history 10% underdosed0% low purity 25 0
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585 Kairos Research Labs Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-04-25Latest test date< 1 year COA history 0% low purity 25 0
Lab evidence
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586 MMAEK251 Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-04-14Latest test date< 1 year COA history 8% underdosed7% low purity 25 0
Lab evidence
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609 Panda Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-03-11Latest test date< 1 year COA history 16% underdosed13% low purity 0 25
Lab evidence
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587 Element Biolabs Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-01-31Latest test date< 1 year COA history 4% low purity 25 0
Lab evidence
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588 Bioforge Peptides Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2026-01-26Latest test date< 1 year COA history 10% underdosed4% low purity 25 0
Lab evidence
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589 Bio Bulk Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2025-11-24Latest test date< 1 year COA history 16% underdosed8% low purity 25 0
Lab evidence
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590 Research Grade Peptides Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2025-11-05Latest test date< 1 year COA history 0% underdosed4% low purity 25 0
Lab evidence
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610 Driada Medical Explore test results Seller type not reviewed No buyer reviews indexed 25Unique reports 2022-03-31Latest test date4+ years COA history Fewer than 5 applicable tests 0 25
Lab evidence
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634 Riptide Labs Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-10-14Latest test date< 1 year COA history 5% underdosed0% low purity 14 10
Lab evidence
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635 AC Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-10-03Latest test date1+ year COA history 4% underdosed0% low purity 14 10
Lab evidence
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625 M Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-30Latest test date1+ year COA history 4% low purity 20 4
Lab evidence
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632 Evolve Wellness OC Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-30Latest test date< 1 year COA history 0% underdosed0% low purity 15 9
Lab evidence
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626 Retaone Labs Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-29Latest test date1+ year COA history 0% underdosed0% low purity 20 4
Lab evidence
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633 Elevar Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-29Latest test date< 1 year COA history 0% underdosed0% low purity 15 9
Lab evidence
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640 C2 Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-29Latest test date< 1 year COA history 0% underdosed0% low purity 8 16
Lab evidence
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642 Prestige Men's Health Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-29Latest test date< 1 year COA history 6% underdosed0% low purity 5 19
Lab evidence
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636 ZOLVIR LLC Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-28Latest test date< 1 year COA history 5% underdosed0% low purity 14 10
Lab evidence
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627 SUPG Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-26Latest test date< 1 year COA history 0% underdosed0% low purity 20 4
Lab evidence
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641 HTX Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-22Latest test date< 1 year COA history 0% underdosed0% low purity 7 17
Lab evidence
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623 AURORA Explore test results Seller type not reviewed 7 buyer reviews 24Unique reports 2026-09-16Latest test date< 1 year COA history 0% underdosed0% low purity 23 1
Lab evidence
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637 Phoenix Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-09-06Latest test date< 1 year COA history 0% underdosed4% low purity 13 11
Lab evidence
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638 HVY Research Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-08-26Latest test date3+ years COA history 10% underdosed0% low purity 13 11
Lab evidence
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628 BioGlow Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-08-08Latest test date< 1 year COA history 0% underdosed4% low purity 19 5
Lab evidence
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629 SNDCartel Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-08-01Latest test date< 1 year COA history 0% underdosed0% low purity 19 5
Lab evidence
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639 Max Ventures LTD (PEP LAUNCHPAD) Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-07-17Latest test date< 1 year COA history 0% underdosed0% low purity 11 13
Lab evidence
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624 Uwa Elite Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-07-01Latest test date1+ year COA history 0% low purity1 endotoxin failure 22 2
Lab evidence
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611 Parasyn Labs Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-06-24Latest test date< 1 year COA history 4% underdosed0% low purity 24 0
Lab evidence
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612 Genxell Bio Pharmaceutical Explore test results Seller type not reviewed 371 buyer reviews 24Unique reports 2026-06-23Latest test date< 1 year COA history 0% low purity 24 0
Lab evidence
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613 Peptides4Lyfe Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-06-21Latest test date< 1 year COA history 10% underdosed0% low purity 24 0
Lab evidence
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631 Next Level Labs - BGS Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-05-01Latest test date< 1 year COA history 0% underdosed0% low purity 16 8
Lab evidence
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614 Vylix Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-04-21Latest test date< 1 year COA history 11% underdosed4% low purity 24 0
Lab evidence
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615 Primitive Biotech Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-03-26Latest test date< 1 year COA history 10% underdosed0% low purity 24 0
Lab evidence
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630 Risynth Bio Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-03-02Latest test date1+ year COA history 0% underdosed0% low purity 18 6
Lab evidence
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616 CasaVita C3 Wellness Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-02-24Latest test date1+ year COA history 0% underdosed9% low purity 24 0
Lab evidence
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643 Purus Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-02-24Latest test date1+ year COA history 0% underdosed0% low purity 5 19
Lab evidence
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617 Valhalla Biolabs Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2026-01-29Latest test date< 1 year COA history 5% underdosed4% low purity 24 0
Lab evidence
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618 Crest Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2025-12-31Latest test date< 1 year COA history 5% underdosed0% low purity 24 0
Lab evidence
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644 ilab pharma Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2025-12-22Latest test date1+ year COA history 9% underdosed5% low purity 0 24
Lab evidence
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619 AlphaLabs Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2025-11-28Latest test date1+ year COA history 5% underdosed4% low purity 24 0
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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620 Prime Performance Peptides Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2025-11-16Latest test date< 1 year COA history 6% underdosed5% low purity 24 0
Lab evidence
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621 Platinum Cryo Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2025-05-08Latest test date1+ year COA history 8% low purity 24 0
Lab evidence
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622 Godbullraw Explore test results Seller type not reviewed No buyer reviews indexed 24Unique reports 2025-03-05Latest test date3+ years COA history 0% underdosed25% low purity 24 0
Lab evidence
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663 Nu-BioLabs Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-10-10Latest test date4+ years COA history 0% low purity 17 6
Lab evidence
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664 Pro Research Peptide Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-10-10Latest test date4+ years COA history 0% underdosed0% low purity 17 6
Lab evidence
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680 Trinera Labs Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-10-07Latest test date< 1 year COA history 0% underdosed0% low purity 5 18
Lab evidence
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667 Full Scale Peptides Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-10-06Latest test date< 1 year COA history 5% underdosed0% low purity 15 8
Lab evidence
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671 No. 1 Peptide Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-10-06Latest test date< 1 year COA history 0% low purity 12 11
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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672 Axion Pept Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-10-01Latest test date< 1 year COA history 14% underdosed12% low purity 12 11
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
- 121,035
- 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 · 17,263 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 · 57,120 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.