Domestic peptide resellers
Domestic resellers.
Ranked by lab reports.
Compare unique reports and measured results from U.S.-based resellers. Products may be made overseas. Rank counts reports, not product quality.
Data refreshed Report dates are shown with each test.
The leading three
Top of the leaderboard.
Ranked by unique lab reports.
See the results behind each position.
Underdosed means at least 10% below the label; low purity means below 97%. Rates use applicable tests, which can differ from unique report counts. Report count does not establish product quality. COA history estimates time since the earliest dated report in our records; a vendor may have operated longer. Vendor names are shown to signed-in members.
Domestic peptide reseller rankings
Resellers with the most lab reports
Ranks 1–50 of 102. Open a row to explore compounds and certificates.
01 Vendor name available with Pro Explore test results No buyer reviews indexed 1,587Unique reports 2026-10-17Last observed4+ years COA history 4% underdosed1% low purity 1,200 387
Lab evidence
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02 Vendor name available with Pro Explore test results No buyer reviews indexed 736Unique reports 2026-10-09Last observed2+ years COA history 0% underdosed3% low purity 588 148
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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03 Vendor name available with Pro Explore test results No buyer reviews indexed 715Unique reports 2026-10-18Last observed1+ year COA history 3% underdosed2% low purity 573 142
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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04 Vendor name available with Pro Explore test results No buyer reviews indexed 704Unique reports 2026-10-16Last observed2+ years COA history 4% underdosed3% low purity 616 88
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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05 Vendor name available with Pro Explore test results No buyer reviews indexed 624Unique reports 2026-10-13Last observed1+ year COA history 3% underdosed1% low purity 517 107
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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06 Vendor name available with Pro Explore test results No buyer reviews indexed 571Unique reports 2026-09-25Last observed1+ year COA history 1% underdosed1% low purity 485 86
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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07 Vendor name available with Pro Explore test results No buyer reviews indexed 528Unique reports 2026-10-01Last observed1+ year COA history 6% underdosed0% low purity 288 240
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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08 Vendor name available with Pro Explore test results No buyer reviews indexed 526Unique reports 2026-09-29Last observed1+ year COA history 4% underdosed1% low purity 342 184
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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09 Vendor name available with Pro Explore test results No buyer reviews indexed 489Unique reports 2026-10-16Last observed1+ year COA history 3% underdosed2% low purity 302 187
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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10 Vendor name available with Pro Explore test results No buyer reviews indexed 421Unique reports 2026-10-05Last observed1+ year COA history 5% underdosed1% low purity 375 46
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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11 Vendor name available with Pro Explore test results No buyer reviews indexed 385Unique reports 2026-07-23Last observed3+ years COA history 7% underdosed1% low purity 71 314
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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12 Vendor name available with Pro Explore test results No buyer reviews indexed 383Unique reports 2026-10-08Last observed1+ year COA history 3% underdosed3% low purity 261 122
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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13 Vendor name available with Pro Explore test results No buyer reviews indexed 338Unique reports 2026-10-18Last observed1+ year COA history 0% underdosed1% low purity 228 110
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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14 Vendor name available with Pro Explore test results No buyer reviews indexed 322Unique reports 2026-10-08Last observed1+ year COA history 12% underdosed1% low purity 308 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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15 Vendor name available with Pro Explore test results No buyer reviews indexed 322Unique reports 2026-10-14Last observed1+ year COA history 11% underdosed<1% low purity 156 166
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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16 Vendor name available with Pro Explore test results No buyer reviews indexed 293Unique reports 2026-10-14Last observed1+ year COA history 6% underdosed2% low purity 288 5
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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17 Vendor name available with Pro Explore test results No buyer reviews indexed 292Unique reports 2026-09-29Last observed2+ years COA history 9% underdosed5% low purity 216 76
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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18 Vendor name available with Pro Explore test results No buyer reviews indexed 288Unique reports 2026-10-13Last observed< 1 year COA history 3% underdosed1% low purity 214 74
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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19 Vendor name available with Pro Explore test results No buyer reviews indexed 279Unique reports 2026-10-14Last observed1+ year COA history 1% underdosed0% low purity 263 16
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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20 Vendor name available with Pro Explore test results No buyer reviews indexed 257Unique reports 2026-06-08Last observed2+ years COA history 6% underdosed4% low purity 243 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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21 NextGen Peptides Explore test results No buyer reviews indexed 255Unique reports 2026-09-23Last observed1+ year COA history 1% underdosed2% low purity 253 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.
Check the original reports, dates and tested batches.
22 Skye Peptides Explore test results No buyer reviews indexed 241Unique reports 2026-09-29Last observed1+ year COA history 0% underdosed7% low purity 217 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.
Check the original reports, dates and tested batches.
23 Glow Aminos Explore test results No buyer reviews indexed 230Unique reports 2026-04-26Last observed1+ year COA history 2% underdosed1% low purity 196 34
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.
Check the original reports, dates and tested batches.
24 Biolongevity Labs Explore test results No buyer reviews indexed 229Unique reports 2026-09-23Last observed1+ year COA history 6% underdosed1% low purity 228 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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25 Orbitrex Peptides Explore test results No buyer reviews indexed 217Unique reports 2026-10-10Last observed6+ years COA history 2% underdosed1% low purity 129 88
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.
Check the original reports, dates and tested batches.
26 Peptidology Explore test results No buyer reviews indexed 208Unique reports 2026-08-28Last observed1+ year COA history 1% underdosed1% low purity 203 5
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.
Check the original reports, dates and tested batches.
27 Crush Research Explore test results No buyer reviews indexed 204Unique reports 2026-10-14Last observed< 1 year COA history 11% underdosed1% low purity 167 37
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.
Check the original reports, dates and tested batches.
28 Peptide Gurus Explore test results No buyer reviews indexed 189Unique reports 2026-09-01Last observed2+ years COA history 3% underdosed8% low purity 112 77
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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29 Eros Peptides Explore test results No buyer reviews indexed 180Unique reports 2026-09-24Last observed2+ years COA history 6% underdosed1% low purity 114 66
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.
Check the original reports, dates and tested batches.
30 Flawless Compounds Explore test results No buyer reviews indexed 177Unique reports 2026-04-26Last observed1+ year COA history 1% underdosed1% low purity 143 34
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.
Check the original reports, dates and tested batches.
31 Legendary Peptides Explore test results No buyer reviews indexed 168Unique reports 2026-09-29Last observed1+ year COA history 1% underdosed3% low purity 145 23
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.
Check the original reports, dates and tested batches.
32 Bluum Peptides Explore test results No buyer reviews indexed 165Unique reports 2026-10-14Last observed< 1 year COA history 3% underdosed1% low purity 106 59
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.
Check the original reports, dates and tested batches.
33 Omegamino Explore test results No buyer reviews indexed 160Unique reports 2026-09-19Last observed1+ year COA history 2% underdosed1% low purity 105 55
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.
Check the original reports, dates and tested batches.
34 Southern Aminos Explore test results No buyer reviews indexed 152Unique reports 2026-09-18Last observed1+ year COA history 3% underdosed2% low purity 130 22
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.
Check the original reports, dates and tested batches.
35 Oros Research Explore test results No buyer reviews indexed 150Unique reports 2026-03-10Last observed1+ year COA history 2% underdosed0% low purity 148 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.
Check the original reports, dates and tested batches.
36 Chameleon Peptides Explore test results No buyer reviews indexed 149Unique reports 2026-09-06Last observed< 1 year COA history 15% underdosed2% low purity 117 32
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.
Check the original reports, dates and tested batches.
37 Peptide Partners Explore test results No buyer reviews indexed 146Unique reports 2026-10-14Last observed1+ year COA history 7% underdosed2% low purity 115 31
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.
Check the original reports, dates and tested batches.
38 Simple Peptides Explore test results No buyer reviews indexed 141Unique reports 2025-11-16Last observed1+ year COA history 12% underdosed5% low purity 141 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.
Check the original reports, dates and tested batches.
39 Nuscience Peptides Explore test results No buyer reviews indexed 141Unique reports 2026-10-09Last observed1+ year COA history 4% underdosed8% low purity 115 26
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.
Check the original reports, dates and tested batches.
40 Liberty Peptides Explore test results No buyer reviews indexed 133Unique reports 2026-10-15Last observed1+ year COA history 13% underdosed7% low purity 132 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.
Check the original reports, dates and tested batches.
41 Instant Peptides Explore test results No buyer reviews indexed 129Unique reports 2026-06-12Last observed1+ year COA history 1% underdosed2% low purity 127 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.
Check the original reports, dates and tested batches.
42 Peptira Explore test results No buyer reviews indexed 129Unique reports 2026-09-16Last observed1+ year COA history 1% underdosed1% low purity 61 68
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.
Check the original reports, dates and tested batches.
43 Eternal Peptides Explore test results No buyer reviews indexed 129Unique reports 2026-09-15Last observed1+ year COA history 10% underdosed2% low purity 26 103
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.
Check the original reports, dates and tested batches.
44 Genpeptide Explore test results No buyer reviews indexed 124Unique reports 2026-09-24Last observed< 1 year COA history 1% underdosed0% low purity 96 28
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.
Check the original reports, dates and tested batches.
45 Rocky Mountain Compounds Explore test results No buyer reviews indexed 123Unique reports 2026-10-07Last observed< 1 year COA history 5% underdosed0% low purity 46 77
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.
Check the original reports, dates and tested batches.
46 Paramount Peptides Explore test results No buyer reviews indexed 122Unique reports 2026-02-02Last observed1+ year COA history 2% low purity 122 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.
Check the original reports, dates and tested batches.
47 Kimera Chems Explore test results No buyer reviews indexed 121Unique reports 2026-05-18Last observed1+ year COA history 7% underdosed2% low purity 121 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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48 NuraPeptide Explore test results No buyer reviews indexed 106Unique reports 2026-09-24Last observed1+ year COA history 2% underdosed1% low purity 89 17
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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49 LA Peptides Explore test results No buyer reviews indexed 98Unique reports 2026-02-14Last observed1+ year COA history 5% underdosed1% low purity 98 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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50 Alpha Peptides Explore test results No buyer reviews indexed 96Unique reports 2026-09-23Last observed1+ year COA history 7% underdosed0% low purity 57 39
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.
Check the original reports, dates and tested batches.
Each report counts once, even when it tests several compounds or appears in multiple archives. Percentages need at least five applicable amount or purity results; explicit endotoxin failures are always shown. See the methodology and known limitations.
Explore low purity, underfilled samples and other lab findings for this seller group →