Explainers, comparisons and guides on peptide research, testing and handling.
A researcher's guide to solid-phase peptide synthesis (SPPS) — how peptides are built amino acid by amino acid, Fmoc vs. Boc strategies, and why synthesis quality determines research reliability.
A clear, source-grounded guide to the difference between 503A compounding pharmacies and 503B outsourcing facilities, including prescriptions, office use, oversight, cGMP, and why the distinction matt
The FDA classifies bulk drug substances into three categories under its 503A interim policy — each with different implications for compounding eligibility and enforcement.
Residual solvents are trace organic chemicals left in peptides after synthesis. Learn what they are, how GC headspace testing detects them, and how to read COA data.
Purity percentages dominate peptide marketing, but what does 99% purity actually measure? This guide explains HPLC purity, its limitations, and the quality metrics that matter.
A researcher's guide to peptide stability — what causes degradation, how to store lyophilized and reconstituted peptides correctly, and how to interpret stability data on a Certificate of Analysis.
HPLC measures peptide purity, while mass spectrometry confirms identity. Together they provide the minimum analytical picture needed to interpret a peptide Certificate of Analysis correctly.
Learn how to interpret every section of a Certificate of Analysis for research peptides — from HPLC purity data to mass spectrometry confirmation, endotoxin testing, and more.
A deep dive into over 300 studies and what they reveal about this remarkable compound.
Breaking down the latest regulatory shifts and what they mean for researchers.
A side-by-side comparison backed by clinical data, not marketing hype.
Understanding COAs, HPLC reports, and what to look for in quality peptides.