What the GHK-Cu record shows

Evidence through 2026-11-09

TitrateLab tracks 4,841 published GHK-Cu certificate-of-analysis source records through 2026-11-09, each with a recorded purity or measured-versus-label amount result. Across 4,797 records with a numeric peptide-purity result, including zero, the median reported purity is 99.8%. Across 4,288 records with measured-versus-label dose data, 55% 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: 2026-11-13T13:09:21.013819+00:00. Calculation time is not a test date.

Published records4,841
Reported purity99.8% median · 4,797 results
Dose accuracy55% within ±10% · 4,288 results
Endotoxin100% pass · 294 determinate results
Evidence dates2022-07-28 to 2026-11-09
Limits and missing evidence
  • The testing laboratory is unattributed on 59 records.
  • Coverage depends on reports that were published and available to ingest.

GHK-Cu lab-testing metrics

4,841
Certificates
99.8%
Median reported purity (zero included)
98%
Purity records ≥ 99%
12
Source records reporting zero purity
17
Testing labs
1,356
Vendors
Mean purity99.4% Below 90% purity1% Mean dose vs label+6.0% Underfilled11% Endotoxin pass100% Within 10% of label dose55% Overdosed ≥ +7%43% Underdosed ≤ −7%14%

COAs per testing lab

Top 12 of 18 labs by certificate count.

Freedom Diagnostics 3,239 99.8% med
Finnrick (Lab E) 777 99.9% med
Janoshik 426 99.8% med
Finnrick (Lab G) 146 99.7% med
Unattributed / lab unknown 59 99.9% med
Chromate 57 100% med
Finnrick (Lab A) 29 100% med
Finnrick (Lab F) 22 99.8% med
ILS Laboratories 21 99.6% med
Vanguard Laboratory 19 99.8% med
Finnrick (Lab D) 14 99.8% med
Accumark Labs 10 99.9% med

+ 6 more labs with fewer certificates.

Tested-purity distribution

Bins below 90% tested purity (1% of numeric purity records).

GHK-Cu tested-purity distribution
Purity rangeCertificates
0–50%14
50–70%2
70–80%7
80–85%2
85–90%2
90–91%0
91–92%1
92–93%0
93–94%0
94–95%2
95–96%0
96–97%0
97–98%6
98–99%37
99–100%4724

COAs over time

GHK-Cu source records by test month (discovery month when test date is absent).

GHK-Cu certificates per month
MonthCertificates
2022-073
2022-111
2023-021
2023-051
2023-092
2023-101
2023-112
2024-013
2024-022
2024-032
2024-042
2024-066
2024-072
2024-083
2024-095
2024-103
2024-113
2024-121
2025-0120
2025-027
2025-0316
2025-0417
2025-0544
2025-0620
2025-0764
2025-0863
2025-0976
2025-10126
2025-11156
2025-12185
2026-01222
2026-02388
2026-03355
2026-04308
2026-05392
2026-06453
2026-07506
2026-08537
2026-09492
2026-10295
2026-1156

Most-tested vendors

Top 10 of 15 vendors by GHK-Cu 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 + 57

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
  • 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 + 53

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
  • 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 + 38

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
  • 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 + 36

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
  • 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 + 29

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
  • 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 + 28

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
  • 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 + 28

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
  • 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 + 28

Lab evidence

Free preview

28 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 + 26

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
  • 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 + 26

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
  • 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

+ 5 more vendors with fewer certificates.

Published GHK-Cu certificates of analysis

Open all 4,841 GHK-Cu reports.

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

Unlock GHK-Cu reports

Pro · $14/month or $88/year

Already have Pro? Sign in

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

Reading GHK-Cu 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 GHK-Cu

More COA results by compound