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Peptide Testing Insights

Expert articles on peptide analysis, quality control, and analytical techniques from our laboratory scientists

From HPLC purity data and mass spectrometry guides to GLP-1 peptide testing trends and compounding pharmacy compliance, practical guidance for researchers and pharmacies.

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All Articles — Page 3 of 5

Endotoxin LAL and heavy metal ICP-MS testing equipment for peptide safety screening
Testing Methods

Endotoxin & Heavy Metal Testing for Peptides: A Complete Safety Guide

Learn why endotoxin (LAL) and heavy metal (ICP-MS) testing are essential for peptide safety, what the tests measure, acceptable limits, and when you need them.

Feb 17, 2026
10 min read
SS-31 elamipretide and MOTS-c mitochondrial peptide purity and identity testing
Peptide Guides

SS-31 & MOTS-c Testing: Verifying Mitochondrial Peptide Purity & Identity

Mitochondrial peptides like SS-31 (Elamipretide) and MOTS-c require specialized analytical methods. Learn why standard testing may miss critical quality issues and how to verify these peptides properly.

Feb 17, 2026
8 min read
GLP-1 peptide testing for semaglutide tirzepatide and retatrutide with HPLC analysis
Testing Methods

GLP-1 Peptide Testing: How to Get Semaglutide, Tirzepatide & Retatrutide Analyzed

Everything you need to know about testing GLP-1 receptor agonist peptides including Semaglutide, Tirzepatide, and Retatrutide for purity, identity, and quality.

Feb 15, 2026
10 min read
Verifying peptides bought online through independent third-party laboratory testing
Consumer Guide

How to Verify Peptides Bought Online (Independent Lab Testing)

Bought research peptides online? Learn how to get them independently tested for identity, purity, and safety before using them in research.

Feb 15, 2026
9 min read
Peptide net content and quantity testing using calibrated analytical balance
Testing Methods

Peptide Quantity & Net Content Testing: Verify the Milligrams in Your Vial

Learn how net peptide content testing determines the actual milligrams of active peptide in your vial, and why the label weight often overstates the true amount.

Feb 15, 2026
8 min read
Laboratory data showing common peptide purity discrepancies between supplier claims and independent testing
Research Data

Common Peptide Purity Discrepancies: How to Compare Results

How to compare supplier claims with independent HPLC and mass spectrometry results, account for method differences, and interpret batch-specific discrepancies.

Feb 15, 2026
10 min read
Bulk peptide testing partnership between research institution and analytical laboratory
Industry Partnerships

Bulk Peptide Testing & Ongoing Lab Partnerships for Research Companies

Research peptide companies need a reliable testing partner, not a one-off vendor. Learn how ongoing lab partnerships with volume pricing, dedicated workflows, and fast turnaround give your business a competitive edge.

Feb 13, 2026
9 min read
Packaging peptide samples for overnight shipping to independent testing laboratory
Lab Selection

Where to Send Peptides for Testing: Mail-In US Lab Guide

Wondering where to send peptides for testing or how to get your peptides tested? This guide covers where to test peptides, how to ship samples, and what to expect from a professional peptide testing lab in the USA.

Feb 12, 2026
9 min read
Independent third-party peptide testing lab verifying supplier Certificate of Analysis claims
Quality Assurance

Independent Peptide Testing: Why Third-Party Lab Results Matter for Research

Learn why independent peptide testing and third-party verification are essential for reliable research. Discover how to peptide verify your supplier's claims with unbiased lab analysis.

Feb 12, 2026
10 min read
Full-service peptide analysis lab offering HPLC purity and mass spectrometry testing
Services Guide

Peptide Analysis Services: What Labs Test For & How It Works

A detailed guide to peptide analysis services and what a peptide analysis laboratory tests for. Learn about HPLC, mass spectrometry, contaminant screening, and how peptide and protein analysis labs deliver results.

Feb 12, 2026
11 min read
Retatrutide triple agonist peptide vial undergoing HPLC purity and identity testing
Peptide Spotlight

Retatrutide Testing: Ensuring Quality of the Next-Generation Triple Agonist Peptide

Learn why Retatrutide (LY3437943) purity testing is critical for metabolic research. Explore HPLC and LC-MS methods for verifying this groundbreaking GIP/GLP-1/glucagon triple agonist peptide.

Feb 11, 2026
10 min read
Tirzepatide dual agonist GLP-1 peptide testing with HPLC purity analysis
Peptide Testing

Tirzepatide Testing: Analytical Methods for This Dual GIP/GLP-1 Agonist

Expert guide to Tirzepatide analytical testing including HPLC purity analysis, LC-MS identity confirmation, and quality challenges unique to this dual-agonist peptide.

Feb 11, 2026
10 min read

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