Document series

Supplier dossiers

20 suppliers assessed against a published six-criterion documentation rubric. The Institute performs no independent testing.

A dossier assesses what a supplier documents, not what it sells. The Institute has purchased nothing, tested nothing and inspected nothing, and every score on these pages is a judgement about records.

The Institute assesses documentation, not product. It has purchased nothing, tested nothing and inspected nothing. Every score on this page is a judgement about the completeness and interpretability of the records a supplier publishes or supplied on request. A high score means that a supplier documents its material well. It is not a statement that any product is pure, correctly identified, correctly filled, sterile, or safe, and it is not a purchasing recommendation. The Institute makes no purchasing recommendations.

No ranking is published. The comparison table sorts on any column and its default order is alphabetical; the coverage limitation of each dossier is carried in the table itself rather than behind a link, following a public submission that a reader sorting a table does not follow links first.

Suppliers the Institute has not assessed

A dossier requires enough published or supplied documentation to score six criteria. The 188 suppliers below have been identified in submitted material but do not meet that threshold, in most cases because nothing beyond a purity percentage was ever obtainable. They are listed so that the assessed set reads as a documentation threshold rather than a shortlist. No dossier, no score, no outbound link.

Supplier	Reported band	Reports identified	Why no dossier
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.

Appearing here records what the Institute could not obtain. It is not an adverse finding and should not be read as one.

Dossiers

20 documents

Bachem Holding (Suzhou) Co., Ltd. (BCH)

CEI-SD-04Suzhou, CNestablished 2003bachemholding.com

Handling documentation is among the better examples in the set, including stated shipment conditions for lyophilised presentations.

80.0 / 100B
ChinaPeptides Co., Ltd. (QYAOBIO) (QYB)

CEI-SD-02Shanghai, CNestablished 2008qyaobiopeptides.com

The only supplier in the set whose certificates routinely restate the requested sequence, which is a meaningful control against sequence ambiguity for investigational compounds.

93.0 / 100A
Chinese Peptide Company Co., Ltd. (CPC)

CEI-SD-06Hangzhou, CNestablished 2001chinesepeptidecompany.net

Batch traceability is among the better examples in the set: certificate batch numbers correspond to vial labelling consistently across the sampled lines.

80.0 / 100B
Flourishglobal Peptide Biotech (Chengdu) Co., Ltd. (FGP)

CEI-SD-10Chengdu, CNestablished 2019flourishglobalpeptide.net

Third-party reporting frequency is good; the gap is in what the supplier's own certificates report.

70.0 / 100B
GL Biochem (Shanghai) Ltd. (GL Biochem)

CEI-SD-17Shanghai, CNestablishment year not recordedglbiochem.net

The strongest identity-confirmation practice in the assessment set, and the only supplier for which amino-acid analysis was offered in response to an Institute enquiry. The comparatively lower third-party score reflects reliance on…

63.0 / 100C
Guangzhou JEEP Biotechnology Co., Ltd. (JEEP)

CEI-SD-20Guangzhou, CNestablishment year not recordedjeepbio.com

The most consistently documented supplier in the Institute's assessment set for incretin analogues specifically. The absence of counter-ion and water determination is the principal gap and is common to the whole set.

80.0 / 100B
Hubei Jianxiang Bioscience Co., Ltd. (HJ)

CEI-SD-11Xianning, CNestablished 2015hubeijianxiang.net

Documentation is consistent in form across lines, which aids comparison even where individual fields are absent.

80.0 / 100B
Hunan Aslsen Technology Co., Ltd. (Homopeptide)

CEI-SD-08Changsha, CNestablishment year not recordedhomopeptide.net

Third-party testing covers part of the catalogue. The identity-confirmation gap is the principal reason for the score and is the subject of an open item in the correspondence log.

93.0 / 100A
Nantong Guangyuan Chemical Co., Ltd. (GGPeps)

CEI-SD-14Nantong, CNestablishment year not recordedggpeps.net

A distributed warehouse network reduces transit time but introduces storage points that certificate documentation doesn't cover. This is the principal open question for this supplier.

65.0 / 100C
Qingdao Saber Technology Pharmaceutical (QST)

CEI-SD-19Qingdao, CNestablished 2017qingdaosabertechnology.com

Third-party reporting is present but identity confirmation on the supplier's own certificates is inconsistent across lines.

60.0 / 100C
Qingdao Sigma Chemical Co., Ltd. (QSC)

CEI-SD-12Qingdao, CNestablishment year not recordedqingdaosigma.com

The lowest certificate-completeness score in the set. A purity figure without a stated method is the single most common documentation deficiency across this supply channel, and this dossier records it in its clearest form. The Institute…

80.0 / 100B
Sangon Biotech (Shanghai) Co., Ltd. (SGN)

CEI-SD-05Shanghai, CNestablished 2004sangonbio.com

Documentation follows life-science reagent conventions more closely than most of the set, which is an advantage in format even where fields remain absent.

93.0 / 100A
Shanghai ERP Biotechnology Co., Ltd. (ERP)

CEI-SD-18Shanghai, CNestablished 2018erpbiotechnology.com

A newer operation with documentation typical of the set's median.

93.0 / 100A
Shanghai Sigma-Audley New Material Technology Co., Ltd. (SSA)

CEI-SD-07Shanghai, CNestablished 2018shanghaisigmaaudley.com

Documentation improved measurably between the two assessment cycles in which this supplier has been reviewed, principally through the addition of mass-spectrometric identity to certificates.

78.0 / 100B
Shanghai Wibson Biotechnology Co., Ltd. (SWB)

CEI-SD-13Shanghai, CNestablished 2019shanghaiwibsonbiotechnology.net

The absence of a peptide-content figure is the single most consequential documentation gap identified for this supplier and was the subject of correspondence in two cycles.

93.0 / 100A
Tianjin Finder Chemical Co., Ltd. (TFC)

CEI-SD-09Tianjin, CNestablishment year not recordedtfcpeptides.com

The handling gap is the Institute's principal concern for this supplier and was raised in correspondence in the current cycle without a substantive response on the specific point.

75.0 / 100B
Wuhan Wansheng Biotechnology Co., Ltd. (WWB)

CEI-SD-15Wuhan, CNestablishment year not recordedwuhanwanshengbio.com

Report volume is high and report-to-batch matching is incomplete. The Institute records both, because a large library that can't be linked to the material in hand supports a general impression of testing rather than a specific quality…

93.0 / 100A
WuXi TIDES (WuXi AppTec Testing Division) (WXT)

CEI-SD-03Wuxi, CNestablished 2002wuxitides.net

Method conditions are stated on certificates more often than for any other supplier assessed, which materially improves interpretability.

85.0 / 100A
Xi'an Mokemei Biotechnology Co., Ltd. (MKM)

CEI-SD-01Xi'an, CNestablished 2016mokemeibiotechnology.com

The correction was made promptly and is recorded in the correspondence log. The Institute records both the inconsistency and the correction.

90.0 / 100A
Zhuhai Kerui Biotechnology Co., Ltd. (KP)

CEI-SD-16Zhuhai, CNestablished 2016keruipeptides.com

Certificate quality is good; the responsiveness score is the weakest element of this assessment.

93.0 / 100A