Compare lab measurements, vendor test histories and original reports for Methasterone.
What the Methasterone record shows
Evidence through 2026-07-03
TitrateLab tracks 18 published Methasterone certificate-of-analysis source records through 2026-07-03, each with a recorded purity or measured-versus-label amount result. Across 4 records with a numeric peptide-purity result, including zero, the median reported purity is 94.1%. Across 14 records with measured-versus-label dose data, 64% 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: 2026-09-26T22:12:36.321377+00:00. Calculation time is not a test date.
Published records18
Reported purity94.1% median · 4 results
Dose accuracy64% within ±10% · 14 results
EndotoxinNot reported
Evidence dates2021-05-15 to 2026-07-03
Limits and missing evidence
No classifiable endotoxin results were recorded.
Coverage depends on reports that were published and available to ingest.
Assay metrics
Methasterone lab-testing metrics
18
Certificates
94.1%
Median reported purity (zero included)
0%
Purity records ≥ 99%
0
Source records reporting zero purity
1
Testing labs
12
Vendors
Mean purity92.8%Below 90% purity25%Mean dose vs label+17.3%Underfilled0%Within 10% of label dose64%Overdosed ≥ +7%36%Underdosed ≤ −7%7%
COAs per testing lab
Every lab testing Methasterone in the corpus.
Janoshik1894.1% med
Tested-purity distribution
Bins below 90% tested purity (25% of numeric purity records).
Methasterone tested-purity distribution
Purity range
Certificates
0–50%
0
50–70%
0
70–80%
0
80–85%
0
85–90%
1
90–91%
0
91–92%
0
92–93%
1
93–94%
0
94–95%
0
95–96%
0
96–97%
1
97–98%
0
98–99%
1
99–100%
0
COAs over time
Methasterone source records by test month (discovery month when test date is absent).
Methasterone certificates per month
Month
Certificates
2021-05
1
2021-09
1
2022-03
1
2022-07
2
2023-01
1
2023-06
1
2023-11
1
2024-01
2
2024-05
1
2024-08
1
2024-10
1
2025-02
1
2025-05
1
2026-01
1
2026-02
1
2026-07
1
Most-tested vendors
Top 10 of 12 vendors by Methasterone certificate count.
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.
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Lab evidence
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2 lab reports from this vendor
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.
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Lab evidence
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1 lab reports from this vendor
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.
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Lab evidence
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1 lab reports from this vendor
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.
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Lab evidence
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1 lab reports from this vendor
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.
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Lab evidence
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1 lab reports from this vendor
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.
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Lab evidence
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1 lab reports from this vendor
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.
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Lab evidence
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1 lab reports from this vendor
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.
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Lab evidence
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1 lab reports from this vendor
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.
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Pro shows the vendor’s name, its original lab reports and batch details.
Vendor behind these reportsVendor name available with Pro
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Vendor name available with ProExplore reports +1
Lab evidence
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1 lab reports from this vendor
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.
TitrateLab ProWhich vendor is this?
Pro shows the vendor’s name, its original lab reports and batch details.
Vendor behind these reportsVendor name available with Pro