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Customer-Selected Independent Testing

Independent Peptide Testing Providers

Marsden Research Labs does not require customers to use a particular testing provider. The laboratories below are provided as a convenience and are generally ordered by the approximate cost of a broader panel that includes identity, purity, quantity, and endotoxin testing where those services are available.

Marsden Research Labs Testing Credit After verification, qualifying customers may receive store credit for the actual laboratory charge up to $110, plus the actual pre-tax price paid for one submitted testing vial.
Up to $110 + Vial Cost
How the providers are ordered: The order below is based on approximate customer cost, not a ranking of laboratory quality, accreditation, reliability, or suitability. Pricing, supported compounds, sample requirements, and turnaround can change. Confirm all details directly with the laboratory before submitting a sample.

Providers with Published or Previously Reviewed Pricing

A qualifying report must include compound identity and purity. Quantity, endotoxin, sterility, bioburden, heavy metals, and other analyses may be included but are not automatically required unless stated in the program terms.

1

Finnrick Public Testing

Public testing for supported compounds includes identity, purity, and quantity at no charge. Bacterial endotoxin testing is available as a paid add-on.

Identity Purity Quantity Optional endotoxin Supported compounds only
Approx. broader-panel cost $110 Approx. $0 after the maximum laboratory credit Start Free Sample Test
2

Krause Analytical

Offers routine peptide purity, potency, and identity testing using HPLC and mass spectrometry. The estimated total below is based on pricing previously reviewed and should be confirmed directly before ordering.

Identity Purity Potency Endotoxin available U.S.-based
Current peptide pricing is not clearly posted on the public website. Confirm the price, tests included, and vial requirements before submitting.
Previously reviewed estimate Approx. $245 Approx. $135 after the maximum laboratory credit Request Testing
3

SteriGenix Analytical

The standard panel includes identity, purity, and quantitation. The extended panel adds endotoxin, sterility, heavy metals, bioburden, and residual-solvent testing.

Identity Purity Quantitation Extended safety panel 1–2 vials U.S.-based
Extended panel $350 Approx. $240 after the maximum laboratory credit Request Submission Number
4

Freedom Diagnostics

Purity and identity testing is priced separately from net peptide content and endotoxin testing. An additional vial is required when endotoxin testing is included.

Identity Purity Net peptide content Endotoxin Additional vial U.S.-based
ID + purity + quantity + endotoxin $400 Approx. $290 after the maximum laboratory credit Start Sample Submission
5

ACS Peptide Testing Labs

Offers identity and purity, net peptide content, endotoxin, heavy metals, residual solvents, and broader contaminant panels. Introductory pricing may differ from standard pricing.

Identity Purity Net peptide content Endotoxin Two closed vials for endotoxin U.S.-based
Expanded panel estimate $437–$487 Approx. $327–$377 after the maximum laboratory credit View Testing Services
6

PeptideTest

Purity and mass-testing prices vary by compound. Endotoxin testing is ordered separately and requires a separate vial.

Identity / mass Purity Quantity Endotoxin Separate endotoxin vial Price varies by compound
Approx. combined cost $500–$700 Approx. $390–$590 after the maximum laboratory credit Order Peptide Testing
7

Janoshik Analytical

The common GLP-1 blind test identifies semaglutide, tirzepatide, or retatrutide and reports amount and purity. Endotoxin testing is available as an add-on.

Blind identity Purity Amount Optional endotoxin International shipping
GLP-1 test + endotoxin $540 Approx. $430 after the maximum laboratory credit View Peptide Tests
8

Vanguard Laboratory

The published Level 2 panel includes purity, quantity, endotoxin, solubility, and sterility or bioburden testing.

Purity Quantity Endotoxin Sterility / bioburden U.S.-based
The published Level 2 description does not clearly state that peptide identity confirmation is included. Confirm identity testing before ordering because a qualifying Marsden Research Labs report must include identity.
Level 2 panel $550 Approx. $440 after the maximum laboratory credit Open Submission Forms

Additional Providers Requiring a Quote or Direct Confirmation

These laboratories offer peptide or related analytical testing, but a directly comparable public single-sample price was not available or should be confirmed before being displayed as a fixed amount.

BTLabs Peptide and protein analytical testing. Contact for the current panel and price. Request Information
ILS Laboratories Peptide QC panels and individual tests. Current rates are available through its client portal. View Peptide Testing
Ethos Analytics Peptide purity, identity, and quantitation services. Quote-based pricing. View Testing Services
Chromate U.S.-based analytical testing. Confirm current peptide scope, price, and application process. View Analytical Services
MtoZ Biolabs Peptide purity and molecular-weight analysis using HPLC and mass spectrometry. Quote required. Request Testing Information

Testing-Credit Requirements

  • The customer independently selects the laboratory.
  • The laboratory does not need to appear on this page, but it must be an identifiable, independent third-party analytical laboratory whose business identity and report can be verified.
  • The completed report must include compound identity and purity.
  • The report must identify the tested sample, compound, test date, methods, and results.
  • The laboratory report must be uploaded or provided through a verifiable laboratory link.
  • Laboratory charges qualify only up to the $110 program limit.
  • Shipping, postage, taxes, rush fees, and unrelated optional services are excluded.
  • Credit eligibility does not depend on receiving a favorable result.

Pricing and service information last reviewed: July 13, 2026.