How to Read a Peptide Purity Report (COA)
So you've ordered peptides online, and they show up with a tiny vial plus some paperwork. That sheet you're looking at? It's called a Certificate of Analysis, or COA for short. Think of it like your peptide's report card. At Peptide Source Canada , every product is backed by a COA to ensure quality, purity, and trust. Here's the thing - most people just toss it in the trash. That's a huge mistake. This document tells you exactly what you're about to put in your body. What's Actually in Your COA Every legit peptide comes with test results. The lab runs several checks before it ships your order out. Purity percentage is right at the top, and this number matters most. Quality peptides should hit 95% or higher. Anything below 90%? You'll want to skip it. Molecular weight shows up next. This confirms you got the right peptide. Each one has a specific weight - kind of like a fingerprint. Wrong weight means the wrong product. Water content tells you how ...