What the CJC-1295 record shows

Evidence through 2026-10-15

TitrateLab tracks 1,024 published CJC-1295 certificate-of-analysis source records through 2026-10-15, each with a recorded purity or measured-versus-label amount result. Across 1,023 records with a numeric peptide-purity result, including zero, the median reported purity is 99.6%. Across 853 records with measured-versus-label dose data, 46% 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: 2026-10-18T09:33:28.918142+00:00. Calculation time is not a test date.

Published records1,024
Reported purity99.6% median · 1,023 results
Dose accuracy46% within ±10% · 853 results
Endotoxin100% pass · 35 determinate results
Evidence dates2019-11-10 to 2026-10-15
Limits and missing evidence
  • The testing laboratory is unattributed on 6 records.
  • Coverage depends on reports that were published and available to ingest.

CJC-1295 lab-testing metrics

1,024
Certificates
99.6%
Median reported purity (zero included)
78%
Purity records ≥ 99%
39
Source records reporting zero purity
13
Testing labs
400
Vendors
Mean purity94.1% Below 90% purity10% Mean dose vs label+1.1% Underfilled17% Endotoxin pass100% Within 10% of label dose46% Overdosed ≥ +7%46% Underdosed ≤ −7%20%

COAs per testing lab

Top 12 of 14 labs by certificate count.

Freedom Diagnostics 586 99.7% med
Finnrick (Lab E) 147 99.4% med
Janoshik 91 99.4% med
Finnrick (Lab A) 63 96.7% med
Finnrick (Lab B) 34 87.3% med
Finnrick (Lab D) 30 98.1% med
Finnrick (Lab C) 26 99.7% med
Finnrick (Lab G) 19 99.6% med
Finnrick (Lab F) 13 93.3% med
Unattributed / lab unknown 6 95% med
Chromate 2 99.7% med
Peptide Test 2 95% med

+ 2 more labs with fewer certificates.

Tested-purity distribution

Bins below 90% tested purity (10% of numeric purity records).

CJC-1295 tested-purity distribution
Purity rangeCertificates
0–50%42
50–70%10
70–80%12
80–85%11
85–90%24
90–91%8
91–92%8
92–93%5
93–94%7
94–95%9
95–96%6
96–97%11
97–98%20
98–99%48
99–100%802

COAs over time

CJC-1295 source records by test month (discovery month when test date is absent).

CJC-1295 certificates per month
MonthCertificates
2019-111
2021-021
2023-031
2023-051
2023-092
2023-113
2023-121
2024-011
2024-021
2024-032
2024-041
2024-051
2024-061
2024-073
2024-082
2024-091
2024-103
2024-122
2025-019
2025-0251
2025-0323
2025-0433
2025-0554
2025-0616
2025-0726
2025-0819
2025-0916
2025-1034
2025-1140
2025-1248
2026-0149
2026-0278
2026-0356
2026-0455
2026-0571
2026-0675
2026-0774
2026-0879
2026-0972
2026-1018

Most-tested vendors

Top 10 of 15 vendors by CJC-1295 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
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Lab evidence

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Lab evidence

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Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.

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Lab evidence

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11 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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Explore this vendor’s lab reports

Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.

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

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Vendor name available with ProExplore reports + 11

Lab evidence

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Explore this vendor’s lab reports

Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.

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

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Lab evidence

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Explore this vendor’s lab reports

Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.

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
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  • Price and stock alerts for your watchlist
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Vendor name available with ProExplore reports + 10

Lab evidence

Free preview

Explore this vendor’s lab reports

Pick a compound, then a report, to see what the lab measured. Each report counts once, and only reports with a source link and a readable result appear here, so this list can hold fewer reports than the total above.

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
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  • Original COAs with batch details
  • Buyer reviews for each vendor
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+ 5 more vendors with fewer certificates.

Published CJC-1295 certificates of analysis

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

Reading CJC-1295 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.

TitrateLab analysis mentioning CJC-1295

More COA results by compound