Lab Literacy
Understand how peptide testing works — from reading a Certificate of Analysis to knowing the difference between HPLC purity and mass spec identity confirmation.
What Third-Party Testing Actually Means
The real difference between manufacturer QC and independent lab testing — what it proves, what it doesn't, and how to verify claims.
HPLC vs Mass Spectrometry: What Each Test Tells You
The two most common tests on a peptide COA answer fundamentally different questions. One measures purity. The other confirms identity. Here's the difference.
How to Spot a Fake COA
Fabricated, altered, and recycled COAs exist in the peptide market. Nine red flags to watch for and four ways to verify a report is genuine.
What Peptide Purity Percentages Actually Mean
Why “98% pure” isn't as simple as it sounds — what the impurities are, why labs disagree, and what the number does and doesn't tell you.
Peptide Storage and Stability: What Happens After the COA
A COA is a snapshot, not a guarantee. How peptides degrade after testing, proper storage for lyophilized vs. reconstituted forms, and the shipping gap.
Net Peptide Content vs HPLC Purity
Why “98% purity” doesn't mean 98% of what you bought is peptide. The difference between these two measurements and why both matter.