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.
502 Veritas Collective Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-10-03Latest test date< 1 year COA history 0% underdosed0% low purity 1 29
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499 HeroPeptidesLab.com Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-10-02Latest test date< 1 year COA history 10% underdosed0% low purity 9 21
Lab evidence
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501 True Sciences Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-09-29Latest test date< 1 year COA history 16% underdosed0% low purity 7 23
Lab evidence
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496 Pure Form Aminos Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-09-10Latest test date< 1 year COA history 0% underdosed0% low purity 24 6
Lab evidence
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490 Peplab Solutions Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-09-04Latest test date< 1 year COA history 0% low purity 27 3
Lab evidence
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491 Peptorin.bio Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-08-18Latest test date< 1 year COA history 0% underdosed0% low purity 26 4
Lab evidence
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500 First Choice Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-08-07Latest test date< 1 year COA history 4% underdosed0% low purity 8 22
Lab evidence
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492 Bioscience Peptides Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-08-01Latest test date1+ year COA history 4% underdosed0% low purity 26 4
Lab evidence
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494 3R Aminos LLC Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-08-01Latest test date1+ year COA history 0% underdosed0% low purity 25 5
Lab evidence
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493 LMG Bio Lifesciences Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-07-21Latest test date< 1 year COA history 0% underdosed0% low purity 26 4
Lab evidence
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487 Clinical Biomed LLC Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-04-25Latest test date1+ year COA history 0% underdosed0% low purity 30 0
Lab evidence
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489 Peptide Dept. Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-04-16Latest test date< 1 year COA history 0% underdosed0% low purity 29 1
Lab evidence
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495 Plum Labs Research, LLC Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2026-03-28Latest test date< 1 year COA history 0% underdosed0% low purity 25 5
Lab evidence
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488 Alpha Gen Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2025-05-21Latest test date1+ year COA history 0% low purity 30 0
Lab evidence
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84 PEPTIDES WORLD Explore test results U.S. reseller No buyer reviews indexed 30Unique reports 2024-06-28Latest test date3+ years COA history 20% underdosed0% low purity 0 30
Lab evidence
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503 JuicePal Explore test results Seller type not reviewed No buyer reviews indexed 30Unique reports 2021-09-18Latest test date8+ years COA history 0% underdosed20% low purity 0 30
Lab evidence
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517 Pixies Peppers Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-10-17Latest test date< 1 year COA history 0% underdosed0% low purity 6 23
Lab evidence
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514 Music City Aminos Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-10-16Latest test date< 1 year COA history 0% underdosed3% low purity 11 18
Lab evidence
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513 Subq Society Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-10-08Latest test date< 1 year COA history 0% low purity 13 16
Lab evidence
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518 Coldwave Bio Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-09-28Latest test date< 1 year COA history 8% underdosed0% low purity 3 26
Lab evidence
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509 Bluebonnet Peptides Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-09-08Latest test date< 1 year COA history 0% underdosed0% low purity 26 3
Lab evidence
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515 Platinum Pure Pharma Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-09-04Latest test date< 1 year COA history 8% underdosed0% low purity 11 18
Lab evidence
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512 Pacific Elite Peptides Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-08-13Latest test date< 1 year COA history 0% underdosed0% low purity 19 10
Lab evidence
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516 STACKHAUS RESEARCH Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-07-31Latest test date< 1 year COA history 4% underdosed0% low purity 9 20
Lab evidence
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510 Peptide Perfection Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-07-27Latest test date1+ year COA history 0% underdosed0% low purity 24 5
Lab evidence
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504 PuraSynth Labs Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-06-28Latest test date< 1 year COA history 0% underdosed0% low purity 29 0
Lab evidence
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511 Paragon Peptides Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-06-20Latest test date1+ year COA history 12% underdosed4% low purity 24 5
Lab evidence
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505 Citadel Labs Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2026-04-09Latest test date< 1 year COA history 0% underdosed0% low purity 29 0
Lab evidence
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519 Prizm Peptides Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2025-12-16Latest test date< 1 year COA history 0% low purity 0 29
Lab evidence
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506 Deuschem Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2025-11-06Latest test date1+ year COA history 35% low purity 29 0
Lab evidence
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507 Pure Rawz Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2025-06-03Latest test date1+ year COA history 3% low purity 29 0
Lab evidence
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508 Astro Peptides Explore test results Seller type not reviewed No buyer reviews indexed 29Unique reports 2025-05-05Latest test date1+ year COA history 28% low purity 29 0
Lab evidence
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532 VMPeptides Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-10-13Latest test date< 1 year COA history 17% underdosed0% low purity 12 16
Lab evidence
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535 Theramedix Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-09-19Latest test date< 1 year COA history 4% underdosed0% low purity 9 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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536 Above All Peptides Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-09-17Latest test date< 1 year COA history 0% low purity 1 27
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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533 Texas Research Peptides Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-09-11Latest test date< 1 year COA history 0% underdosed0% low purity 10 18
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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530 PepTek Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-09-02Latest test date< 1 year COA history 19% underdosed0% low purity 14 14
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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520 Kylo Peptides Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-08-27Latest test date< 1 year COA history 17% underdosed0% low purity 28 0
Lab evidence
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528 HB Peptide Explore test results Seller type not reviewed 2 buyer reviews 28Unique reports 2026-08-23Latest test date< 1 year COA history 0% underdosed0% low purity 17 11
Lab evidence
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529 True North Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-08-23Latest test date< 1 year COA history 8% underdosed0% low purity 15 13
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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526 OBM- Alternative Therapy Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-08-12Latest test date1+ year COA history 0% underdosed0% low purity 26 2
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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531 Peptide Vault Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-08-09Latest test date< 1 year COA history 0% underdosed0% low purity 14 14
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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534 SIGMAPAC Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-07-18Latest test date< 1 year COA history 4% underdosed0% low purity 10 18
Lab evidence
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521 Cheat Codes Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-06-30Latest test date< 1 year COA history 9% underdosed4% low purity 28 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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522 Hero Research LLC Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-06-10Latest test date< 1 year COA history 6% underdosed0% low purity 28 0
Lab evidence
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527 Hunan Ruiwang Technology Center Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-06-04Latest test date1+ year COA history 0% low purity 22 6
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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525 Rock Compounds LLC Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-05-30Latest test date< 1 year COA history 0% underdosed0% low purity 27 1
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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523 Pepper Health Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-05-05Latest test date< 1 year COA history 9% underdosed0% low purity 28 0
Lab evidence
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538 303peptides.com Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2026-01-19Latest test date1+ year COA history 22% underdosed0% low purity 0 28
Lab evidence
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524 XP Labs Explore test results Seller type not reviewed No buyer reviews indexed 28Unique reports 2025-10-18Latest test date1+ year COA history 8% underdosed0% low purity 28 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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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
- 121,020
- 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.