Semaglutide Certificate of Analysis — 857 COAs

Every Semaglutide certificate of analysis below is from an independent third-party lab, ingested and verified by TitrateLab. The figures here are computed live from the 857 published Semaglutide certs in our corpus.

Assay metrics

Semaglutide lab-testing metrics

99.7%

Median tested purity

Zero-purity certs

Mean purity98.7% Mean dose vs label+8.9% Endotoxin pass100% Within 10% of label dose51% Overdosed ≥ +7%53% Underdosed ≤ −7%10%

COAs per testing lab

Every lab testing Semaglutide in the corpus.

Janoshik 338 99.7% med

Freedom Diagnostics 162 99.8% med

Finnrick (Lab E) 97 99.8% med

Finnrick (Lab A) 73 99.7% med

Finnrick (Lab C) 61 99.9% med

Finnrick (Lab G) 37 99.8% med

Finnrick (Lab B) 30 99.8% med

Finnrick (Lab D) 18 99.3% med

Finnrick (Lab F) 16 99.8% med

Peptide Test 9 99.9% med

Unattributed / lab unknown 2 99.3% med

Tested-purity distribution

Bins below 90% tested purity.

Semaglutide tested-purity distribution
Purity range	Certificates
0–50%	7
50–70%	0
70–80%	1
80–85%	0
85–90%	2
90–91%	0
91–92%	0
92–93%	0
93–94%	0
94–95%	2
95–96%	3
96–97%	1
97–98%	13
98–99%	40
99–100%	788

COAs over time

Semaglutide certificates published per month.

Semaglutide certificates per month
Month	Certificates
2022-09	1
2022-10	1
2023-01	1
2023-02	2
2023-04	2
2023-05	6
2023-06	1
2023-07	1
2023-08	2
2023-09	10
2023-10	1
2023-11	3
2023-12	3
2024-01	6
2024-02	7
2024-03	6
2024-04	11
2024-05	13
2024-06	15
2024-07	13
2024-08	15
2024-09	4
2024-10	9
2024-11	17
2024-12	15
2025-01	13
2025-02	73
2025-03	66
2025-04	49
2025-05	75
2025-06	56
2025-07	61
2025-08	52
2025-09	49
2025-10	54
2025-11	29
2025-12	30
2026-01	17
2026-02	20
2026-03	10
2026-04	21
2026-05	7
2026-06	9
2026-07	1

Most-tested vendors

Top 10 of 15 vendors by Semaglutide certificate count.

See who tests most — unlock the vendor names with Pro.

Verified Vendor A 🔒 23

Verified Vendor B 🔒 22

Verified Vendor C 🔒 20

Verified Vendor D 🔒 16

Verified Vendor E 🔒 16

Verified Vendor F 🔒 15

Verified Vendor G 🔒 15

Verified Vendor H 🔒 15

Verified Vendor I 🔒 14

Verified Vendor J 🔒 12

+ 5 more vendors with fewer certificates.

7 of these Semaglutide certificates reported 0% of the labeled compound — a "sample does not contain" result. Always read the individual cert.

Verified Semaglutide certificates of analysis

Vendor	Purity	Dose vs label	Lab	Tested
Alpha BioPharma	99.885%	—	Janoshik	2026-07-10	View COA →
Wuhan Wansheng Biotechnology	99.9%	+3.5%	LabE	2026-06-22	View COA →
NuraPeptide	99.91%	+24.3%	Freedom Diagnostics	2026-06-14	View COA →
Hxnet	99.8%	+10.0%	LabG	2026-06-12	View COA →
Hxnet	99.7%	+9.3%	LabE	2026-06-02	View COA →
Hk Peptides	99.9%	+1.0%	LabE	2026-06-01	View COA →
Peptaris	99.43%	+9.8%	Freedom Diagnostics	2026-05-30	View COA →
CERTAPEPTIDES	99.262%	+4.6%	Janoshik	2026-05-27	View COA →
Longevity Pro Labs	99.653%	—	Janoshik	2026-05-18	View COA →
Longevity Pro Labs	99.458%	—	Janoshik	2026-05-18	View COA →
Zlz Peptide	99.9%	-41.9%	LabE	2026-05-13	View COA →
Zlz Peptide	99.9%	-6.5%	LabE	2026-05-06	View COA →
Hk Peptides	99.9%	-52.1%	LabE	2026-05-05	View COA →
NouvePen	99.482%	-0.4%	Janoshik	2026-04-30	View COA →
Hxnet	99.9%	-0.9%	LabE	2026-04-28	View COA →
Aminos Research	99.9%	-4.6%	LabE	2026-04-28	View COA →
Aminos Research	99.2%	-2.3%	LabE	2026-04-28	View COA →
Tianjin Ruiwang New Material Technology Co	99.9%	-2.0%	LabE	2026-04-28	View COA →
Shanxi Qianyecao Biotech Qyc	99.874%	+1.7%	Janoshik	2026-04-22	View COA →
(unknown)	99.648%	+15.0%	Janoshik	2026-04-10	View COA →
Top Peptide	99.644%	+14.9%	Unknown	2026-04-08	View COA →
Top Peptide	99.644%	+14.9%	Janoshik	2026-04-08	View COA →
Top Peptide	99.644%	+14.9%	Janoshik	2026-04-08	View COA →
—	99.711%	—	Janoshik	2026-04-07	View COA →
GYC	99.867%	+8.2%	Peptide Test	2026-03-30	View COA →
GYC	99.897%	+10.0%	Peptide Test	2026-03-30	View COA →
Peptislim	99.9%	+21.0%	LabG	2026-03-25	View COA →
Bulk Peptide Supply	99.9%	+1.0%	LabE	2026-03-18	View COA →
www.wanxipeptide.com	99.774%	+5.2%	Janoshik	2026-03-11	View COA →
Nexaph	99.2%	+9.0%	LabE	2026-03-06	View COA →
Tsc Top Supplements China	99.8%	+8.0%	LabG	2026-03-04	View COA →
Chilton Labs / www.chiltonlabs.ru	99.906%	—	Janoshik	2026-03-04	View COA →
Risynth Bio	99.9%	+5.5%	LabE	2026-03-02	View COA →
Peptide Sciences	99.5%	+12.0%	LabG	2026-03-01	View COA →
Zenith Jove Peptide Zj	0.0%	-100.0%	LabE	2026-02-26	View COA →
Qingdao Sigma Chemical	99.885%	—	Janoshik	2026-02-26	View COA →
Qingdao Sigma Chemical	99.603%	—	Janoshik	2026-02-26	View COA →
Qingdao Sigma Chemical	99.603%	+2.7%	Janoshik	2026-02-26	View COA →
Qingdao Sigma Chemical	99.885%	-3.8%	Janoshik	2026-02-26	View COA →
EZP	99.812%	+0.0%	Janoshik	2026-02-24	View COA →
AMP	99.812%	+0.0%	Janoshik	2026-02-24	View COA →
Modern Research LLC	99.842%	-0.2%	Janoshik	2026-02-24	View COA →
White Claw Labs	99.851%	-8.6%	Janoshik	2026-02-20	View COA →
Bfflist Amo	99.737%	+2.1%	Peptide Test	2026-02-20	View COA →
Bfflist Amo	99.903%	+1.2%	Peptide Test	2026-02-20	View COA →
Hxnet	99.8%	-3.3%	LabE	2026-02-18	View COA →
Chilton Labs / www.chiltonlabs.ru	99.666%	—	Janoshik	2026-02-10	View COA →
Chilton Labs / www.chiltonlabs.ru	99.817%	—	Janoshik	2026-02-10	View COA →
Zlz Peptide	99.8%	-23.0%	LabG	2026-02-10	View COA →
Modern Research LLC	99.299%	+17.0%	Janoshik	2026-02-09	View COA →
Bulk Peptide Wholesale	99.9%	+2.0%	LabE	2026-02-06	View COA →
Bulk Peptide Wholesale	99.9%	+3.0%	LabE	2026-02-06	View COA →
Peptislim	99.8%	+9.3%	LabG	2026-02-04	View COA →
HM PEPTIDE	99.718%	+27.5%	Unknown	2026-02-03	View COA →
Oupeptide	0.0%	-100.0%	LabE	2026-01-29	View COA →
(unknown)	99.683%	+11.0%	Janoshik	2026-01-29	View COA →
Zlz Peptide	99.9%	-15.7%	LabG	2026-01-26	View COA →
Hk Peptides	99.9%	+8.7%	LabG	2026-01-26	View COA →
Modern Research LLC	99.625%	+30.0%	Janoshik	2026-01-16	View COA →
Peptislim	98.19%	-59.5%	LabE	2026-01-15	View COA →

Showing the 60 most recent of 857 Semaglutide certificates.

Semaglutide research & evidence → Verify a Semaglutide COA → Browse vendors →

More COA results by compound

Retatrutide COA (9804) Tirzepatide COA (7363) GHK-Cu COA (2458) BPC-157 COA (2397) Tesamorelin COA (2238) MOTS-c COA (1983) NAD+ COA (1477) TB-500 COA (1253) BPC-157 + TB-500 COA (1141) Ipamorelin COA (1132) BPC-157 + Ghk-cu + Kpv + TB-500 COA (947) CJC-1295 + Ipamorelin COA (898)

Semaglutide COA — Verified Certificate of Analysis Results