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Resources · Testing labs

Trusted Peptide Testing Labs

Independent third-party labs for verifying peptide identity and purity. The only way to truly confirm what you have is real: a supplier's own COA tells you what they want you to believe; a third-party lab tells you what is actually in the vial.

Philippines Peptides editorial deskUpdated 4 min read

Why Independent Testing

Recommended Labs

  • Janoshik Analytical

    Czech Republic

    TURNAROUND
    Average turnaround time: 7 business days
    COST
    USD 215–450 per identity, purity and quantity analysis
    PRIMARY SERVICE
    HPLC purity testing
    HPLC purity testingMass spectrometry (identity)Full peptide profile

    Accepts international samples by mail. Its price list is published per compound on its own site.

    Turnaround and price as the lab publishes them, read 2026-09-23. Source

    Visit lab website

  • Colmaric Analyticals

    USA

    TURNAROUND
    Stated per order on the lab site
    COST
    Stated per order on the lab site
    PRIMARY SERVICE
    HPLC purity
    HPLC purityIdentity confirmationSmall molecule analysis

    US-based lab. Accepts international samples. The lab-test dataset holds no published turnaround or price for it, so this page does not state a figure.

    Visit lab website

  • Micro Quality Labs

    USA (California)

    TURNAROUND
    Stated per order on the lab site
    COST
    Stated per order on the lab site
    PRIMARY SERVICE
    Research compound analysis
    Research compound analysisPeptide purityEndotoxin testing

    Its listed services include endotoxin and sterility testing as well as purity. The lab-test dataset holds no published turnaround or price for it, so this page does not state a figure.

    Visit lab website

  • MZ Biolabs

    USA

    TURNAROUND
    Stated per order on the lab site
    COST
    Stated per order on the lab site
    PRIMARY SERVICE
    HPLC purity
    HPLC purityMass spectrometry (identity)Peptide and small-molecule analysis

    US analytical laboratory that publishes its licensing on its own site. Turnaround and pricing are quoted on request, so this page does not state a figure.

    Visit lab website

  • Freedom Diagnostics

    USA

    TURNAROUND
    Stated per order on the lab site
    COST
    Stated per order on the lab site
    PRIMARY SERVICE
    HPLC purity
    HPLC purityIdentityPublic certificate lookup

    Runs a public certificate lookup, so a report a seller shows you can be found on the laboratory's own site by its number. That lookup is the feature to prefer when comparing labs.

    Visit lab website

  • Accumark Labs

    Not stated on the lab site

    TURNAROUND
    Standard results typically in 2 business days from sample receipt. | Typical turnaround time for standard analytical services is 48–72 hours after sample acceptance.
    COST
    USD 250 per identity, purity and quantity analysis
    PRIMARY SERVICE
    HPLC purity
    HPLC purityBiosafety panels

    A peptide-focused laboratory with a public services page. Third-party coverage of it exists, including one review questioning how little the site says about who runs it. Ask for the report number and the verification route before relying on a certificate from any lab, this one included.

    Turnaround and price as the lab publishes them, read 2026-09-23. Source

    Visit lab website

How to Submit a Sample

  • Contact the lab

    Visit the website and submit a test request or email. They will send sample submission instructions and payment details.

  • Prepare your sample

    Follow the lab's own sample-size and packaging instructions.

  • Ship internationally

    Use a courier with tracking and declare the contents accurately. Customs handling is not guaranteed.

  • Receive your COA

    Within the stated turnaround, you receive a COA via email showing identity, purity percentage, and any detected impurities.

  • Compare to supplier COA

    Check identity, purity range, and impurity profile. Report discrepancies to the community.

When to Test

TriggerReason
New supplier: first orderEstablish baseline quality before committing to larger purchases.
Suspicious product qualityUnusual appearance, color, or solubility may indicate degradation or substitution.
No COA provided by supplierIf no COA exists, independent testing is your only verification option.
High-value peptide orderSpending significant money on Retatrutide or Tirzepatide warrants verification.
Verifying claimed puritySupplier claims 99%+. Verify against actual lab result.
No results or unexpected effectsCould indicate underdosing, wrong compound, or contamination.

Cost vs Benefit

Published prices across the 5 laboratories in the lab-test dataset (read from each lab's own site, 2026-09-23) are below, before shipping. Weigh them against the value of the order; for a new supplier, a first test is worth considering.

IDENTITY + PURITY + QUANTITY
from USD 200
ENDOTOXIN
from USD 175
STERILITY
from USD 150

Updated