Research Use Only Peptides: What the RUO Label Really Means
What the “research use only” label on peptides means, where it comes from, why regulators look beyond the label to intended use, and what it means for researchers.
What Is GHK-Cu? The Copper Tripeptide Explained
GHK-Cu explained: what the copper tripeptide is, how it was discovered, how it binds copper, how it differs from AHK-Cu, and how lyophilized and cosmetic formats compare.
How to Choose a Research Peptide Supplier: A 10-Point Checklist
Ten practical checks for choosing a research peptide supplier, from batch documentation and labelling to compliance, policies and support.
Peptide Purity Testing Explained: What HPLC and Mass Spectrometry Measure
What a “99% purity” figure actually means: how HPLC and mass spectrometry work together, why net peptide content is different, and which impurities testing looks for.
How to Store Lyophilized Peptides: Temperature, Light and Moisture
Practical storage guidance for lyophilized research peptides: temperature, light and moisture, how to open a cold vial, aliquoting, and why solutions need extra care.
How to Read a Peptide Certificate of Analysis (COA)
A section-by-section guide to the peptide certificate of analysis: what each test shows, what it does not, and the red flags to check before you rely on a batch.