These are documentation pages, not recommendations. Each one records identity facts, a structured verification table with dates, lots and methods from Janoshik, Medutest, PeptideMeter and VendorInvestigate, an assessment of documentation quality, community reviews, named maintainers and a review date. Each page links the supplier's own storefront, marked nofollow and sponsored, so a claim here can be read against the seller's own copy — we take nothing from any of them and a link is not a recommendation.
| Supplier | Short | City | Est. | Rank | Rating | Reviews | Record state | Doc quality |
|---|---|---|---|---|---|---|---|---|
| Flourishglobal Peptide Biotech (Chengdu) Co., Ltd. | FGP | Chengdu | 2019 | 1 | 9.3/10 | 847 | Verified | 3/5 |
| Qingdao Sigma Chemical Co., Ltd. | QSC | Qingdao | — | 2 | 9.7/10 | 794 | Disputed | 2/5 |
| Hubei Jianxiang Bioscience Co., Ltd. | HJ | Xianning | 2015 | 3 | 9.8/10 | 737 | Verified, one record disputed | 3/5 |
| Zhuhai Kerui Biotechnology Co., Ltd. | KP | Zhuhai | 2016 | 4 | 9.7/10 | 623 | Verified | 4/5 |
| GL Biochem (Shanghai) Ltd. | GL Biochem | Shanghai | — | 5 | 9.5/10 | 2,130 | Verified | 5/5 |
| Shanghai ERP Biotechnology Co., Ltd. | ERP | Shanghai | 2018 | 6 | 9.7/10 | 920 | Verified, one record disputed | 3/5 |
| Wuhan Wansheng Biotechnology Co., Ltd. | WWB | Wuhan | — | 7 | 9.9/10 | 1,199 | Verified, one record disputed | 3/5 |
| Qingdao Saber Technology Pharmaceutical | QST | Qingdao | 2017 | 8 | 9.4/10 | 545 | Verified | 3/5 |
| Sangon Biotech (Shanghai) Co., Ltd. | SGN | Shanghai | 2004 | 9 | 9.6/10 | 994 | Verified | 4/5 |
| Xi'an Mokemei Biotechnology Co., Ltd. | MKM | Xi'an | 2016 | 10 | 9.5/10 | 820 | Partially verified | 3/5 |
| Tianjin Finder Chemical Co., Ltd. | TFC | Tianjin | — | 11 | 9.4/10 | 383 | Verified | 3/5 |
| ChinaPeptides Co., Ltd. (QYAOBIO) | QYB | Shanghai | 2008 | 12 | 9.8/10 | 554 | Verified | 5/5 |
| Hunan Aslsen Technology Co., Ltd. | Homopeptide | Changsha | — | 13 | 9.9/10 | 402 | Partially verified | 2/5 |
| Nantong Guangyuan Chemical Co., Ltd. | GGPeps | Nantong | — | 14 | 9.3/10 | 857 | Verified, one record disputed | 3/5 |
| Guangzhou JEEP Biotechnology Co., Ltd. | JEEP | Guangzhou | — | 15 | 9.6/10 | 990 | Verified | 5/5 |
| Chinese Peptide Company Co., Ltd. | CPC | Hangzhou | 2001 | 16 | 9.7/10 | 1,164 | Verified | 4/5 |
| Bachem Holding (Suzhou) Co., Ltd. | BCH | Suzhou | 2003 | 17 | 9.6/10 | 556 | Verified | 4/5 |
| Shanghai Sigma-Audley New Material Technology Co., Ltd. | SSA | Shanghai | 2018 | 18 | 9.4/10 | 611 | Verified | 4/5 |
| WuXi TIDES (WuXi AppTec Testing Division) | WXT | Wuxi | 2002 | 19 | 9.5/10 | 913 | Verified | 5/5 |
| Shanghai Wibson Biotechnology Co., Ltd. | SWB | Shanghai | 2019 | 20 | 9.7/10 | 1,019 | Verified | 4/5 |
Research compound manufacturer trading as FGP (flourishglobalpeptide.net), based in Chengdu, China, established 2019. Janoshik-tested and verified by Medutest, PeptideMeter and…
4 verification records · 4 services · reviewed by 9 Sep 2026
Research peptide supplier founded 2017 in Qingdao, Shandong, China, operating a worldwide warehouse network with Janoshik third-party testing. No storefront is recorded for this vendor.
4 verification records · 3 services · reviewed by 19 Aug 2026
Research compound manufacturer trading as HJ (hubeijianxiang.net), based in Xianning, China, established 2015. Janoshik-tested and verified by Medutest, PeptideMeter and VendorInvestigate;…
4 verification records · 4 services · reviewed by 24 Aug 2026
Research compound manufacturer trading as KP (keruipeptides.com), based in Zhuhai, China, established 2016. Janoshik-tested and verified by Medutest, PeptideMeter and VendorInvestigate;…
4 verification records · 4 services · reviewed by 14 Oct 2026
Major peptide synthesis company founded 1998 in Shanghai, China. ISO 9001 and cGMP certified with more than 1,500 employees and over 200 patents, supplying custom peptides and amino acid…
5 verification records · 4 services · reviewed by 16 Dec 2026
Research compound manufacturer trading as ERP (erpbiotechnology.com), based in Shanghai, China, established 2018. Janoshik-tested and verified by Medutest, PeptideMeter and…
4 verification records · 4 services · reviewed by 28 Sep 2026
Research-grade peptide, SARM, injectable and raw-material supplier based in Wuhan, Hubei, China. Janoshik-tested, with a substantial body of published third-party test reports. No…
5 verification records · 4 services · reviewed by 5 Aug 2026
Research compound manufacturer trading as QST (qingdaosabertechnology.com), based in Qingdao, China, established 2017. Janoshik-tested and verified by Medutest, PeptideMeter and…
4 verification records · 4 services · reviewed by 11 Aug 2026
Research compound manufacturer trading as SGN (sangonbio.com), based in Shanghai, China, established 2004. Janoshik-tested and verified by Medutest, PeptideMeter and VendorInvestigate;…
4 verification records · 4 services · reviewed by 2 Dec 2026
Research compound manufacturer trading as MKM (mokemeibiotechnology.com), based in Xi'an, China, established 2016. Janoshik-tested and verified by Medutest, PeptideMeter and…
4 verification records · 4 services · reviewed by 16 Sep 2026
Research compound manufacturer and exporter trading as TFC, based in Tianjin, China. Janoshik-tested and verified by PeptideMeter, Medutest and VendorInvestigate; supplies peptides, SARMs…
4 verification records · 4 services · reviewed by 2 Sep 2026
Research compound manufacturer trading as QYB (qyaobiopeptides.com), based in Shanghai, China, established 2008. Janoshik-tested and verified by Medutest, PeptideMeter and…
4 verification records · 4 services · reviewed by 18 Nov 2026
Research-grade peptide and SARM supplier trading as Homopeptide, based in Changsha, Hunan, China. PeptideMeter, Medutest and VendorInvestigate verified, operating a warehouse network with…
4 verification records · 3 services · reviewed by 1 Aug 2026
Peptide supplier based in Nantong, Jiangsu, China, operating a multi-region warehouse network. Janoshik-tested and PeptideMeter verified. No storefront is recorded for this vendor.
4 verification records · 4 services · reviewed by 28 Oct 2026
Factory-direct research peptide manufacturer trading as JEEP Peptides (jeepbio.com), based in Guangzhou, Guangdong, China. Janoshik-tested with a stated GLP-1 specialty; supplies research…
5 verification records · 4 services · reviewed by 18 Jan 2027
Research compound manufacturer trading as CPC (chinesepeptidecompany.net), based in Hangzhou, China, established 2001. Janoshik-tested and verified by Medutest, PeptideMeter and…
4 verification records · 4 services · reviewed by 30 Nov 2026
Research compound manufacturer trading as BCH (bachemholding.com), based in Suzhou, China, established 2003. Janoshik-tested and verified by Medutest, PeptideMeter and VendorInvestigate;…
4 verification records · 4 services · reviewed by 11 Nov 2026
Research compound manufacturer trading as SSA (shanghaisigmaaudley.com), based in Shanghai, China, established 2018. Janoshik-tested and verified by Medutest, PeptideMeter and…
4 verification records · 4 services · reviewed by 22 Oct 2026
Research compound manufacturer trading as WXT (wuxitides.net), based in Wuxi, China, established 2002. Janoshik-tested and verified by Medutest, PeptideMeter and VendorInvestigate.…
5 verification records · 4 services · reviewed by 9 Dec 2026
Research compound manufacturer trading as SWB (shanghaiwibsonbiotechnology.net), based in Shanghai, China, established 2019. Janoshik-tested and verified by Medutest, PeptideMeter and…
4 verification records · 4 services · reviewed by 5 Oct 2026
The 20 above have pages because there are dated, methodical verification records to put on them. The 188 below get named in topics without ever accumulating enough for a page to say anything defensible. They are listed so the set above reads as earned. No page, no rating, no link.
| Supplier | Band | Mentions | What we hold |
|---|---|---|---|
| Trusted Peptide | B | 2 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Risynth Bio | B | 8 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| NUPEPS Peptides | B | 4 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Hunan GoodPeptides Biotech Co | B | 2 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Bulk Peptide Wholesale | B | 20 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Paradigm Peptide | B | 16 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Orbitrex Peptides | B | 17 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Aavant Research | B | 13 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| PeptiAtlas | B | 4 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| The Naughty Needle | B | 2 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Lux Synth Aminos | B | 2 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Huaian Hanyou Peptide | B | 7 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Lisa Biopeptide | B | 11 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Lipeptides | B | 7 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| NextGen Health | B | 3 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| OmegAmino | B | 4 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Xianhong Tong XHT Peptides | B | 5 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Diju Peptides Wellness and Co | B | 4 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Zhang TY | B | 4 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| SubQ Society | B | 3 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Bfflink | B | 13 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Laicuinuo LCN | B | 7 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Cellupep | B | 7 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Shanghai Leader Peptide Biotechnology | B | 8 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Peptronix Bio PTB | B | 13 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Yongkang Nuoao Trading Co | B | 9 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Eros Peptides | B | 3 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Champion Peptide | B | 6 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Bio Pepz | B | 4 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Shandong Nuoweiou Medical Technology Co | B | 5 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| PurePEPS | B | 4 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Rayshine Peptide Biochemicals | C | 6 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| HealthTide Biotech | C | 6 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Dankang BioHealth | C | 12 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Kits4less | C | 7 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Huayi Biotechnology | C | 19 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Anlv Biotechnology | C | 10 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Xingtai Pukelai Technology Co | C | 6 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| EHZ Peptides | C | 39 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Zztai Peptide | C | 30 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Chimera Peptides | C | 8 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Hangzhou Mandy Biotechnology | C | 14 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Yabang Peptide | C | 10 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Evolve BioPep | C | 7 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Quenna PMQ | D | 15 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Nanjing Xiyuxun Technology XYX | D | 3 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Welon Peptide Solutions | D | 5 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Xingtai Lesda Technology | E | 6 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Qingdao Hongshengda Trading | E | 4 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| ZZQ Peptides | E | 22 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Changan District Sheng Peptide Trading | E | 7 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| UWA Elite Peptides | E | 16 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Hangzhou Youngpeptide Biotechnology HYB | E | 15 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Modern Aminos | E | 4 | Poor record on what has been submitted, and thin coverage on top of it. |
| Shanghai OuDaXin New Material Technology Center | E | 43 | Poor record on what has been submitted, and thin coverage on top of it. |
| Shenzhen Jiechuang Trading | E | 8 | Poor record on what has been submitted, and thin coverage on top of it. |
| Shaanxi Dideu Medichem | E | 6 | Poor record on what has been submitted, and thin coverage on top of it. |
| Qingdao VitaConin International Trading | E | 5 | Poor record on what has been submitted, and thin coverage on top of it. |
| Guangzhou Lengiuanhuang Cosmetics | E | 4 | Poor record on what has been submitted, and thin coverage on top of it. |
| Shanghai JinBei Chemical Technology | B | 18 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Peptide Technologies | B | 11 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Pura Peptides | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Peptide Partners | B to C | 64 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Bfflist AMO | B to C | 63 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Pure Tested Peptides | B to C | 7 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| PeptiSlim | C to E | 38 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Glamgurcraft Innovations Foreign Trade | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| HkRoids | B to C | 14 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Yiwu Aozuo Trading Co | B to E | 91 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Peptide Haven | B | 4 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Atomik Labz | B to C | 40 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Bulk Peptide Supply | B to E | 20 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| M-Peptides | B to C | 17 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Mai Peptide | C to E | 55 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Peptidology | B | 16 | Consistent on the lots seen, but on too few of them to distinguish a good process from a good run. |
| Hazel | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| TCI | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Uther | B to E | 69 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Shandong Shengyuan Peptide Technology | B to E | 24 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| LiliPeptide | C to E | 185 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Xingruida XDR | B to D | 64 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Eternal Peptides | B | 23 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Tianjin Ruiwang New Material Technology Co | B to E | 107 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Polaris Peptides | B to D | 97 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Injectify | B to E | 29 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Precision Peptide Co | B to C | 21 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| AKS Chem | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Reta-Peptide | B to E | 144 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Peptide-S | B to E | 125 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Planet Peptide | B to D | 59 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Henan Sahe Peptide | B to D | 18 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Hunan Ruiwang Technology Center | B to C | 14 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Skye Peptides | B to E | 73 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Nuscience Peptides | B to D | 47 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| NextechLabs | B to D | 30 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Golden Eagle | B to C | 17 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Peptide Worldwide | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| HK Peptides | B to E | 343 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Nexaph | B to E | 200 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| BeiBangAn | C to D | 38 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Shandong Aishi Biotechnology | D to E | 37 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Xingtai Jiachuang Technology | C to E | 31 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Zenith Jove Peptide ZJ | B to E | 26 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Kerisite Shenzhen International | B to D | 16 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| YB Peptide | B to E | 10 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Qing Li Peptide | B to E | 260 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Shanxi Qianyecao Biotech QYC | D to E | 66 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Verified Peptides | B to C | 34 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Hebei Rimao Technology | C to D | 32 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Pure Rawz | B to D | 29 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Heman Peptide HM | B to E | 29 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Shanghai Baoju | B to E | 21 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| ZLZ Peptide | B to E | 199 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Peptide Sciences | B to E | 123 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Allen Biotechnology Co ABC | B to E | 43 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Peptide Crafters | B to D | 39 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Simple Peptide | B to D | 26 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Top Peptide | C to D | 21 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Zen Peptides | B to C | 13 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Amino Lair | B to D | 12 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Oupeptide | B to E | 149 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Paramount Peptides | B to E | 65 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Yimei | B to E | 54 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| LSPL | C to E | 40 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Royal Peptides | B to C | 30 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Shenzhen Loga Tech LG LOGA | B to E | 21 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| ZhuoYan lab | C to E | 30 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Astro Peptides | B to E | 29 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Mix Peptides | D to E | 29 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Science | B to C | 12 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| TSC Top Supplements China | C to E | 99 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| HXNet | C to E | 91 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Xian Yihang Technology | C to E | 48 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Haikou Mingheng Technology | B to C | 16 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| SRY Labs | B to E | 111 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Accelerate Labs | B to E | 20 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| PurePeptides | B to E | 15 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Regenerative Research | X | 2 | Middling and shallow. Enough submissions to form an impression, not enough to trust it. |
| Zhejiang Yichenkang Biotechnology | B to E | 58 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Biolongevity Labs | B to E | 33 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Alpha-Gen | B to E | 30 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| LN Peptides | B to E | 28 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Forever Young Pharmacy | B to E | 26 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Prime Peptides | B to E | 19 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Haikou Mingheng Biotechnology | D to E | 11 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Dragon Pharma | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Liberty Peptides | B to E | 16 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Amino Asylum | B to C | 15 | Mixed record across lots, with the better and worse results separated by more than method noise would account for. |
| Amino Amigos | B to E | 37 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Platinum Cryo | B to E | 24 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Elite Research USA | B to E | 47 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Limitless Life Nootropics | B to D | 22 | Wide batch-to-batch spread. Some lots test respectably and others do not, and nothing published explains which is which. |
| Oasis Peptides | B to E | 16 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Suaway Lab Research | B to E | 39 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Pharma Grade Peptides | B to E | 18 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| PeptiLab Research | B to E | 15 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Tydes | C to E | 41 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Loti Labs | B to E | 32 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Wolverine Peptides | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Amplified Amino | C to E | 12 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Alimo Peptide | D to E | 7 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Richards Biotech Simply Richards | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Coastal Peptides | B to E | 26 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Peptides 4 Research | C to E | 20 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Deuschem | B to E | 29 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Hybiopeptides | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Peptide Gurus | B to E | 45 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Swiss Chems | C to E | 9 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| WllyBIO | X | 1 | One submission on record. A single result is an anecdote about a vial, not a finding about a company. |
| Biolabshop Limited | C to E | 6 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| Peptides For Sale | D to E | 21 | Results run the whole range, from acceptable to nothing detectable. A batch-to-batch spread that wide is the finding: whatever the mean says, the lot you receive is a coin toss. |
| NuLife Peptides | B | 6 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Wuhan Newtop Biotech | X | 2 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| LOOKBiotech | X | 2 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| PRIVATE | X | 2 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Peptide Ark | X | 2 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Zhuoyue Biotechnology | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Hebei Chengtong Technology | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Coffee and Peppers | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Marvel Peptide | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| HK Fat Cat | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Guangzhou Yuao Trading | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| PepKits | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Lejian Biotech Peptide | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| PepLab Solutions | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Explicit Sarms | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Weifang Xingbei International Trade | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
| Advanced Technology and Industrial | X | 1 | Listed but never returned a usable result — no assay on file, so nothing here can be said about what they ship. |
A supplier here has not been assessed. Its absence from the documented set is a statement about how little we hold, not a judgement about the company.