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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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
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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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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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87 Limitless Life Nootropics Explore test results U.S. reseller No buyer reviews indexed 23Unique reports 2026-10-20Latest test date1+ year COA history 43% low purity 22 1
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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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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683 PeptiLab Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-09-30Latest test date2+ years COA history 0% underdosed0% low purity 0 23
Lab evidence
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678 Renewal Chain Co. Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-09-28Latest test date< 1 year COA history 0% underdosed0% low purity 7 16
Lab evidence
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659 PMQ — Quenna Pmq Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-09-24Latest test date1+ year COA history 5% low purity 20 3
Lab evidence
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673 Steady Meds Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-09-24Latest test date< 1 year COA history 0% low purity 12 11
Lab evidence
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675 Alien Labz Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-09-21Latest test date< 1 year COA history 0% underdosed0% low purity 10 13
Lab evidence
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681 Mino Labs Research Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-09-18Latest test date< 1 year COA history 0% underdosed0% low purity 2 21
Lab evidence
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661 Remedy Peptides Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-09-16Latest test date< 1 year COA history 0% underdosed0% low purity 18 5
Lab evidence
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660 Simple Aminos Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-09-15Latest test date< 1 year COA history 0% underdosed0% low purity 19 4
Lab evidence
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679 Seqra Peptides Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-09-03Latest test date< 1 year COA history 0% underdosed0% low purity 7 16
Lab evidence
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654 American Amino Peptides Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-08-23Latest test date< 1 year COA history 0% underdosed0% low purity 22 1
Lab evidence
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668 Gladdix Peptides Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-08-11Latest test date< 1 year COA history 12% underdosed0% low purity 14 9
Lab evidence
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655 Epic Compounds Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-08-06Latest test date< 1 year COA history 17% underdosed4% low purity 22 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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669 Nexera Peptide Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-08-05Latest test date< 1 year COA history 5% underdosed0% low purity 14 9
Lab evidence
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682 Mai Peptides Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-08-05Latest test date< 1 year COA history 0% underdosed0% low purity 2 21
Lab evidence
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88 Licensed Peptides Explore test results U.S. reseller No buyer reviews indexed 23Unique reports 2026-08-04Latest test date< 1 year COA history 6% underdosed0% low purity 19 4
Lab evidence
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665 Averis Labs Peptides Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-08-01Latest test date< 1 year COA history 0% underdosed0% low purity 17 6
Lab evidence
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676 LYNK PEPTIDES/ LINK PEPTIDES Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-07-31Latest test date< 1 year COA history 0% underdosed0% low purity 9 14
Lab evidence
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662 Baoju Chemical Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-07-23Latest test date1+ year COA history 0% low purity 18 5
Lab evidence
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656 Alpha 1 Peptides Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-07-21Latest test date1+ year COA history 0% underdosed0% low purity 21 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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670 Alpha BioPharma Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-07-10Latest test date1+ year COA history 12% low purity 13 10
Lab evidence
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666 Ghozt Lab Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-07-06Latest test date< 1 year COA history 0% underdosed0% low purity 16 7
Lab evidence
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645 Guangzhou Aoyu Trading Firm Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-07-01Latest test date< 1 year COA history 6% underdosed0% low purity 23 0
Lab evidence
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646 Peptides For Sale Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-05-13Latest test date1+ year COA history 21% low purity 23 0
Lab evidence
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677 Wuhan Wansheng Bio Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-05-12Latest test date2+ years COA history 8% underdosed12% low purity 9 14
Lab evidence
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674 Walker Chemicals (WKC) Explore test results Seller type not reviewed 32 buyer reviews 23Unique reports 2026-04-20Latest test date< 1 year COA history 0% underdosed0% 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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647 Command Fitness Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-04-15Latest test date< 1 year COA history 5% underdosed0% low purity 23 0
Lab evidence
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648 Oasis Peptides Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-03-25Latest test date2+ years COA history 10% low purity 23 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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649 AminoWell Labs Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-03-14Latest test date< 1 year COA history 0% underdosed4% low purity 23 0
Lab evidence
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657 Synaptik Solutions Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-03-12Latest test date1+ year COA history 12% underdosed0% low purity 21 2
Lab evidence
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658 Firetides Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-02-27Latest test date1+ year COA history 8% underdosed0% low purity 21 2
Lab evidence
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650 AlphaTide Labs Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-02-14Latest test date< 1 year COA history 0% underdosed9% low purity 23 0
Lab evidence
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651 Restore Peptides LLC Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-02-10Latest test date< 1 year COA history 0% underdosed0% low purity 23 0
Lab evidence
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652 Authentic Aminos LLC Explore test results Seller type not reviewed No buyer reviews indexed 23Unique reports 2026-02-03Latest test date< 1 year COA history 5% underdosed0% low purity 23 0
Lab evidence
Free previewExplore this vendor’s lab reports
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 · 38 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 · 344 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.