TB-500 Testing: Why Mass Matters More Than Purity
TB-500 is a 43-amino-acid peptide, so identity by mass spectrometry is the check that counts. Here is what the HPLC and mass results should show on a Certificate of Analysis.
Tag: certificate of analysis
BioLean3 Reta Certificate of Analysis: What to Check
How BioLean3 Reta is verified: identity by mass, purity by HPLC and content per vial, plus what each line of its Certificate of Analysis should show.
How to Read a Peptide Vendor Review: What the Rankings Are Actually Measuring
Quick answer: Most “best peptide vendor” roundups are affiliate content. The ranking reflects which supplier pays the highest commission and runs the most organized affiliate program, not which supplier makes the cleanest material. This is not a conspiracy - it is a disclosed, legal business model. But it means the ranking is measuring something other […]
What an FDA Import Alert Actually Does - and Why Your Peptide’s Manufacturing Address Matters
Quick answer: An FDA import alert lets the agency detain shipments from a named foreign facility automatically, without opening a single box. It is called Detention Without Physical Examination, and once a facility is on the list, every subsequent shipment is flagged by default. Three of these alerts sit directly over the peptide supply chain […]