Compare lab measurements, vendor test histories and original reports for Semaglutide.
What the Semaglutide record shows
Evidence through 2026-08-18
TitrateLab tracks 1,087 published Semaglutide certificate-of-analysis source records through 2026-08-18, each with a recorded purity or measured-versus-label amount result. Across 1,087 records with a numeric peptide-purity result, including zero, the median reported purity is 99.7%. Across 832 records with measured-versus-label dose data, 49% are within 10% of the labeled quantity. This is a public convenience sample, not a randomized market survey; one result describes one submitted sample and does not verify other batches.
Published records with a non-null purity or measured-versus-label amount result. Matching uses a normalized compound slug. No deduplication in this archive summary; relays and corrected records can remain separate. Records with neither measurement are excluded here, but can appear in the research overview's exact-token raw-record total. These are not unique certificates or batches. TitrateLab indexes reports from third-party laboratories.
Aggregate calculated: 2026-09-08T07:29:46.066003+00:00. Calculation time is not a test date.
Published records1,087
Reported purity99.7% median · 1,087 results
Dose accuracy49% within ±10% · 832 results
Endotoxin100% pass · 18 determinate results
Evidence dates2022-09-15 to 2026-08-18
Limits and missing evidence
The testing laboratory is unattributed on 8 records.
Coverage depends on reports that were published and available to ingest.
Assay metrics
Semaglutide lab-testing metrics
1,087
Certificates
99.7%
Median reported purity (zero included)
93%
Purity records ≥ 99%
7
Source records reporting zero purity
14
Testing labs
316
Vendors
Mean purity98.9%Below 90% purity1%Mean dose vs label+9.4%Underfilled7%Endotoxin pass100%Within 10% of label dose49%Overdosed ≥ +7%56%Underdosed ≤ −7%9%
COAs per testing lab
Top 12 of 15 labs by certificate count.
Janoshik41899.6% med
Freedom Diagnostics20599.8% med
Finnrick (Lab E)10599.9% med
Chromate8299.7% med
Finnrick (Lab A)7399.7% med
Finnrick (Lab C)6199.9% med
Finnrick (Lab G)3899.8% med
Finnrick (Lab B)3099.8% med
Finnrick (Lab D)1899.3% med
Finnrick (Lab F)1699.8% med
Peptide Test999.9% med
Unattributed / lab unknown899.9% med
+ 3 more labs with fewer certificates.
Tested-purity distribution
Bins below 90% tested purity (1% of numeric purity records).
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%
4
96–97%
2
97–98%
15
98–99%
43
99–100%
1011
COAs over time
Semaglutide source records by test month (discovery month when test date is absent).
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
3
2023-09
10
2023-10
1
2023-11
4
2023-12
3
2024-01
7
2024-02
7
2024-03
9
2024-04
13
2024-05
19
2024-06
17
2024-07
17
2024-08
21
2024-09
8
2024-10
9
2024-11
19
2024-12
28
2025-01
17
2025-02
84
2025-03
72
2025-04
59
2025-05
79
2025-06
66
2025-07
74
2025-08
63
2025-09
59
2025-10
67
2025-11
36
2025-12
35
2026-01
20
2026-02
30
2026-03
54
2026-04
18
2026-05
16
2026-06
10
2026-07
15
2026-08
3
Most-tested vendors
Top 10 of 15 vendors by Semaglutide certificate count.
Open a compound, then a COA to inspect its measurements. This preview includes source-linked, deduplicated reports with a usable result. Its coverage can differ from the broader report count above.
Connect these results to a vendor.
Pro reveals the name and gives you access to the lab-report archive.
Open a compound, then a COA to inspect its measurements. This preview includes source-linked, deduplicated reports with a usable result. Its coverage can differ from the broader report count above.
Connect these results to a vendor.
Pro reveals the name and gives you access to the lab-report archive.
Open a compound, then a COA to inspect its measurements. This preview includes source-linked, deduplicated reports with a usable result. Its coverage can differ from the broader report count above.
Connect these results to a vendor.
Pro reveals the name and gives you access to the lab-report archive.
This chart compares report counts for this compound. A larger test history does not establish better purity, dose accuracy or endotoxin results. Inspect the individual reports to compare measurements.
Connect these results to a vendor.
Pro reveals the name and gives you access to the lab-report archive.
Open a compound, then a COA to inspect its measurements. This preview includes source-linked, deduplicated reports with a usable result. Its coverage can differ from the broader report count above.
Connect these results to a vendor.
Pro reveals the name and gives you access to the lab-report archive.
Open a compound, then a COA to inspect its measurements. This preview includes source-linked, deduplicated reports with a usable result. Its coverage can differ from the broader report count above.
Connect these results to a vendor.
Pro reveals the name and gives you access to the lab-report archive.
Open a compound, then a COA to inspect its measurements. This preview includes source-linked, deduplicated reports with a usable result. Its coverage can differ from the broader report count above.
Connect these results to a vendor.
Pro reveals the name and gives you access to the lab-report archive.
This chart compares report counts for this compound. A larger test history does not establish better purity, dose accuracy or endotoxin results. Inspect the individual reports to compare measurements.
Connect these results to a vendor.
Pro reveals the name and gives you access to the lab-report archive.
This chart compares report counts for this compound. A larger test history does not establish better purity, dose accuracy or endotoxin results. Inspect the individual reports to compare measurements.
Connect these results to a vendor.
Pro reveals the name and gives you access to the lab-report archive.
This chart compares report counts for this compound. A larger test history does not establish better purity, dose accuracy or endotoxin results. Inspect the individual reports to compare measurements.
Connect these results to a vendor.
Pro reveals the name and gives you access to the lab-report archive.