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All peptides · KLOW · COAs

KLOW COA & lab test results

124 certificates of analysis published by 94 vendors, newest first.

46with readable numbers
99.71%median purity
108%median measured vs label
19testing labs

Labs: AV Analytics, Accumark Labs, Analytical Formulations, Bioviridian, Chromate, Ethos Analytics, Finnrick Analytics, Freedom Diagnostics, Horizon Analytical, Janoshik, Krause Analytical, Lingke Bio-Detection, MDx BioAnalytical Laboratory, MZ Biolabs, Pacific Coast Biologics, Qorix Labs (Tianjin), SideChain Analytics, TrustPointe Analytics, Vanguard Laboratory.

VendorLabDateLabelMeasuredPurity
Go Alpha Labs PeptidesFreedom Diagnostics2026-09-26––99.81%View
Elite Research USAFreedom Diagnostics2026-09-2180 mg53 mg (66%)99.73%View
Sunrise BioResearchFreedom Diagnostics2026-09-2180 mg90.14 mg (113%)99.81%View
Valor peptidesAccumark Labs2026-09-1880 mg81.82 mg (102%)99.81%View
Valor peptidesAccumark Labs2026-09-1680 mg83.15 mg (104%)99.79%View
Valor peptidesAccumark Labs2026-09-14120 mg–99.8%View
Regenerative ResearchFreedom Diagnostics2026-09-11125 mg127.67 mg (102%)99.61%View
SPBFreedom Diagnostics2026-09-1180 mg94.36 mg (118%)99.93%View
SoliraChromate2026-09-1080 mg–99.676%View
Peptide PartnersTrustPointe Analytics2026-09-0980 mg70.49 mg (88%)99.689%View
Skye PeptidesAccumark Labs2026-09-0880 mg86.43 mg (108%)99.8%View
Bulk Peptide SupplyCOA concernsAV Analytics2026-09-06––99.79%View
Peptide PartnersChromate2026-09-05––99.61%View
Evolve BioPepEthos Analytics2026-09-0280 mg––View (image)
HelixBridgeSideChain Analytics2026-09-0280 mg87.52 mg (109%)–View
Domestic PepsFreedom Diagnostics2026-09-0180 mg97.56 mg (122%)99.69%View
The Naughty NeedleFreedom Diagnostics2026-08-2880 mg89.46 mg (112%)99.82%View
Jett LabsFreedom Diagnostics2026-08-2680 mg91.38 mg (114%)99.85%View
Alpha BioMed–2026-08-25–––View (image)
Ion PeptideFreedom Diagnostics2026-08-2480 mg84.51 mg (106%)99.73%View
Flycn PeptideJanoshik2026-08-21–––View (image)
NovapureQorix Labs (Tianjin)2026-08-1780 mg–99.74%View
SaiyanMedFreedom Diagnostics2026-08-1780 mg100.67 mg (126%)99.97%View
Orbitrex PeptidesFreedom Diagnostics2026-08-1580 mg96.86 mg (121%)99.67%View
Core PeptidesVanguard Laboratory2026-08-0580 mg–99.64%View
Gulf Coast AminosFreedom Diagnostics2026-08-0480 mg82.04 mg (103%)99.43%View
PX PeptidesJanoshik2026-0880 mg87.84 mg (110%)–View
Amplified AminoJanoshik2026-07-3180 mg––View (image)
Certified Peptides–2026-07-3180 mg––View (image)
Hangzhou Mandy BiotechnologyJanoshik2026-07-3180 mg––View (image)
NexaphJanoshik2026-07-3180 mg34.2 mg (43%)–View
Qingdao Sigma Chemical QSC–2026-07-29–––View (image)
LumiraCOA concernsPacific Coast Biologics2026-07-2880 mg55.1 mg (69%)99.5%View
Glacier AminosEthos Analytics2026-07-2780 mg––View (image)
Hangzhou Mandy BiotechnologyJanoshik2026-07-2780 mg––View (image)
Orbitrex PeptidesFreedom Diagnostics2026-07-2580 mg76.51 mg (96%)99.49%View
PeptagonAccumark Labs2026-07-2480 mg91.16 mg (114%)99.71%View
PugPepsCOA concernsFreedom Diagnostics2026-07-2480 mg––View (image)
BioPrecise LLCCOA concernsFinnrick Analytics2026-07-22––99.8%View
Rhome ResearchFreedom Diagnostics2026-07-1074 mg74.07 mg (100%)99.34%View
Paramount PeptidesAccumark Labs2026-07-06–––View (image)
Skye PeptidesAccumark Labs2026-07-0680 mg88.61 mg (111%)99.67%View
Alpha-GenFreedom Diagnostics2026-07-0380 mg–99.38%View
Guangzhou AoyuFreedom Diagnostics2026-07-0180 mg55.11 mg (69%)99.66%View
LabRatscoCOA concernsLingke Bio-Detection2026-06-27–––View (image)
Onyx ResearchFreedom Diagnostics2026-06-2680 mg86.2 mg (108%)99.7%View
Peptide CraftersVanguard Laboratory2026-06-2680 mg52.87 mg (66%)99.5%View
Guangzhou AoyuFreedom Diagnostics2026-06-2580 mg54.31 mg (68%)99.42%View
BioHack LondonJanoshik2026-06-2380 mg88.59 mg (111%)–View
PepClub USAFreedom Diagnostics2026-06-2180 mg81.6 mg (102%)99.72%View
Kits4lessJanoshik2026-06-1980 mg––View (image)
TydesJanoshik2026-06-17–––View (image)
Pura PeptidesFreedom Diagnostics2026-05-2180 mg91.61 mg (115%)99.89%View
UtherJanoshik2026-05-20–––View
Huatai PeptideFreedom Diagnostics2026-05-1980 mg89.74 mg (112%)99.56%View
Longevity ProsJanoshik2026-05-14–––View (image)
UtherJanoshik2026-05-04–––View
Alpha PeptidesAnalytical Formulations2026-05-0180 mg90.39 mg (113%)99.8%View
Aura PeptidesCOA concernsHorizon Analytical2026-05-01–––View (image)
Junli PeptideCOA concernsJanoshik2026-04-30–––View (image)
Prime Peptides–2026-04-01–––View (image)
Flycn PeptideJanoshik2026-03-30–––View (image)
LN Peptides–2026-03-3080 mg––View (image)
Medi PeptideJanoshik2026-03-3080 mg––View (image)
Nuscience PeptidesFreedom Diagnostics2026-03-05–––View (image)
Loti LabsBioviridian2026-03-0280 mg––View (image)
PeptiSlimJanoshik2026-02-2380 mg––View (image)
LMRJanoshik2026-02-1380 mg––View (image)
Wolverine PeptidesJanoshik2026-02-10–––View (image)
LN Peptides–2026-01-1280 mg––View (image)
Pharma Grade PeptidesJanoshik2025-12-1780 mg––View (image)
Hangzhou Mandy BiotechnologyKrause Analytical2025-12-1280 mg––View (image)
PeptideJFTJanoshik2025-12-11–––View (image)
Flycn PeptideJanoshik2025-10-16–––View (image)
Medi PeptideJanoshik2025-10-1580 mg––View (image)
Shanghai ERP peptide BiotechnologyCOA concernsJanoshik2025-09-3080 mg––View (image)
Peptide HavenFreedom Diagnostics2025-09-2380 mg79.48 mg (99%)99.76%View
Huaian Banting TradingJanoshik2025-08-1880 mg––View (image)
Allen Biotechnology Co ABCJanoshik–80 mg––View (image)
Apollo Peptide SciencesJanoshik–75 mg––View (image)
BarnJanoshik––––View (image)
BarnJanoshik––––View (image)
BeiBangAnJanoshik–80 mg––View (image)
BeiBangAnJanoshik–80 mg––View (image)
Bluebonnet Peptides––80 mg––View (image)
Cocer PeptidesJanoshik––––View (image)
Emlin BioScience Exchange–––––View (image)
Guangzhou Jeep Biotechnology JEEPJanoshik–80 mg––View (image)
Guangzhou Jeep Biotechnology JEEPJanoshik–80 mg95.14 mg (119%)–View
HB PeptidesJanoshik–80 mg––View (image)
InjectifyJanoshik––––View (image)
Jinan Elitepeptide Chemical JEC JCEJanoshik–80 mg––View (image)
Licensed PeptidesVanguard Laboratory––––View (image)
Longevity PlanMZ Biolabs–––99.2%View
Modern Aminos––80 mg––View (image)
Modern Aminos––80 mg––View (image)
Nantong Guangyuan Chemical GYCJanoshik–80 mg––View (image)
Peptide Makers––80 mg––View (image)
Peptides 4 ResearchMDx BioAnalytical Laboratory––––View (image)
Peptronix Bio PTBJanoshik–80 mg––View (image)
Peptronix Bio PTBJanoshik–80 mg––View (image)
Peptronix Bio PTBJanoshik–80 mg––View (image)
Platinum CryoChromate––––View (image)
Prime PeptidesJanoshik––––View (image)
PugPepsCOA concerns––80 mg––View (image)
PugPepsCOA concerns––80 mg––View (image)
PurePeptides––80 mg––View (image)
Qingdao Saber Technology Pharma QSTJanoshik–80 mg––View (image)
Qingdao Saber Technology Pharma QSTJanoshik–80 mg––View (image)
Shanghai Sigma Audley SSAJanoshik–80 mg––View (image)
Shanghai Wibson Biotechnology WBSJanoshik–80 mg––View (image)
Shenzhen Aurora Biotechnology––80 mg––View (image)
Skye PeptidesJanoshik–80 mg––View (image)
SPBJanoshik–80 mg––View (image)
SPBJanoshik–80 mg––View (image)
SPBJanoshik–80 mg––View (image)
Tianjin Finder Chemical TFCJanoshik––––View (image)
Tianjin Finder Chemical TFCJanoshik––––View (image)
Verified Peptides–––––View (image)
Verified Peptides–––––View (image)
WKC Walker ChemicalsJanoshik–80 mg––View (image)
XTPCOA concernsJanoshik––––View (image)
YuanSense TechJanoshik––––View (image)
YuanSense TechJanoshik––––View (image)

A vendor's COA shows one tested sample, not every batch. Numbers are filled in only where the document is readable text; image-only COAs are linked without numbers. Vendors banned for fake reports are excluded. Compare KLOW prices and lab-verified vendors.