What the Methasterone record shows

Evidence through 2026-07-07

TitrateLab tracks 19 published Methasterone certificate-of-analysis source records through 2026-07-07, each with a recorded purity or measured-versus-label amount result. Across 5 records with a numeric peptide-purity result, including zero, the median reported purity is 96%. 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: 2026-11-13T13:09:01.878818+00:00. Calculation time is not a test date.

Published records19
Reported purity96% median · 5 results
Dose accuracy64% within ±10% · 14 results
EndotoxinNot reported
Evidence dates2021-05-15 to 2026-07-07
Limits and missing evidence
  • No classifiable endotoxin results were recorded.
  • Coverage depends on reports that were published and available to ingest.

Methasterone lab-testing metrics

19
Certificates
96%
Median reported purity (zero included)
0%
Purity records ≥ 99%
0
Source records reporting zero purity
1
Testing labs
12
Vendors
Mean purity93.9% Below 90% purity20% 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.

Janoshik 19 96% med

Tested-purity distribution

Bins below 90% tested purity (20% of numeric purity records).

Methasterone tested-purity distribution
Purity rangeCertificates
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%2
99–100%0

COAs over time

Methasterone source records by test month (discovery month when test date is absent).

Methasterone certificates per month
MonthCertificates
2021-051
2021-091
2022-031
2022-072
2023-011
2023-061
2023-111
2024-012
2024-051
2024-081
2024-101
2025-021
2025-051
2026-011
2026-021
2026-072

Most-tested vendors

Top 10 of 12 vendors by Methasterone certificate count.

TitrateLab ProVendor names in this chart are hidden. Lab-report counts stay public.Vendor namesOriginal COAsBatch detailsBuyer reviewsPrice and stock alertsSee vendor names with Pro
Vendor name available with ProExplore reports + 4

Lab evidence

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4 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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Vendor name available with ProExplore reports + 2

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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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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  • Original COAs with batch details
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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 Pro Which vendor is this?

Pro shows the vendor’s name, its original lab reports and batch details.

Vendor behind these reportsVendor name available with Pro
What Pro unlocks
  • Vendor names on every ranking and chart
  • Original COAs with batch details
  • Buyer reviews for each vendor
  • Price and stock alerts for your watchlist
  • Ask Titer, the AI research assistant
Vendor name available with ProExplore reports + 1

Lab evidence

Free preview

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 Pro Which vendor is this?

Pro shows the vendor’s name, its original lab reports and batch details.

Vendor behind these reportsVendor name available with Pro
What Pro unlocks
  • Vendor names on every ranking and chart
  • Original COAs with batch details
  • Buyer reviews for each vendor
  • Price and stock alerts for your watchlist
  • Ask Titer, the AI research assistant
Vendor name available with ProExplore reports + 1

Lab evidence

Free preview

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 Pro Which vendor is this?

Pro shows the vendor’s name, its original lab reports and batch details.

Vendor behind these reportsVendor name available with Pro
What Pro unlocks
  • Vendor names on every ranking and chart
  • Original COAs with batch details
  • Buyer reviews for each vendor
  • Price and stock alerts for your watchlist
  • Ask Titer, the AI research assistant
Vendor name available with ProExplore reports + 1

Lab evidence

Free preview

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 Pro Which vendor is this?

Pro shows the vendor’s name, its original lab reports and batch details.

Vendor behind these reportsVendor name available with Pro
What Pro unlocks
  • Vendor names on every ranking and chart
  • Original COAs with batch details
  • Buyer reviews for each vendor
  • Price and stock alerts for your watchlist
  • Ask Titer, the AI research assistant
Vendor name available with ProExplore reports + 1

Lab evidence

Free preview

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 Pro Which vendor is this?

Pro shows the vendor’s name, its original lab reports and batch details.

Vendor behind these reportsVendor name available with Pro
What Pro unlocks
  • Vendor names on every ranking and chart
  • Original COAs with batch details
  • Buyer reviews for each vendor
  • Price and stock alerts for your watchlist
  • Ask Titer, the AI research assistant
Vendor name available with ProExplore reports + 1

Lab evidence

Free preview

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 Pro Which vendor is this?

Pro shows the vendor’s name, its original lab reports and batch details.

Vendor behind these reportsVendor name available with Pro
What Pro unlocks
  • Vendor names on every ranking and chart
  • Original COAs with batch details
  • Buyer reviews for each vendor
  • Price and stock alerts for your watchlist
  • Ask Titer, the AI research assistant
Vendor name available with ProExplore reports + 1

Lab evidence

Free preview

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 Pro Which vendor is this?

Pro shows the vendor’s name, its original lab reports and batch details.

Vendor behind these reportsVendor name available with Pro
What Pro unlocks
  • Vendor names on every ranking and chart
  • Original COAs with batch details
  • Buyer reviews for each vendor
  • Price and stock alerts for your watchlist
  • Ask Titer, the AI research assistant
Vendor name available with ProExplore reports + 1

Lab evidence

Free preview

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 Pro Which vendor is this?

Pro shows the vendor’s name, its original lab reports and batch details.

Vendor behind these reportsVendor name available with Pro
What Pro unlocks
  • Vendor names on every ranking and chart
  • Original COAs with batch details
  • Buyer reviews for each vendor
  • Price and stock alerts for your watchlist
  • Ask Titer, the AI research assistant

+ 2 more vendors with fewer certificates.

Published Methasterone certificates of analysis

Open all 19 Methasterone reports.

Unlock the actual vendor, purity, dose accuracy, lab, batch and saved certificate for every Methasterone result.

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Illustrative structure only. No record-level values are present in this preview.

Reading Methasterone lab reports

A valid report describes the sample that was submitted, not every vial sold under the same name. Guide: How to verify and read a peptide COA: 5 checks.

More COA results by compound