Guides for checking the paperwork
How to read the documents research suppliers publish, what the tests can and can't tell you, and how to spot a supplier worth avoiding.
How to Read a Certificate of Analysis for Research Peptides
A field-by-field walk through a peptide COA: what each line means, what a complete result looks like, and what the document can't tell you.
HPLC and Mass Spec Explained: The Two Tests Behind a Peptide COA
HPLC tells you how much of a sample is the main compound. Mass spec tells you whether that compound is the right molecule. Here is how to read both.
Third-Party vs In-House Testing: What the Difference Means
Who ran the test and who chose the sample matter as much as the purity figure. Here is how in-house and independent testing differ, and how to weigh them.
What “Research Use Only” Means on a Peptide Label
Research use only is a statement of intended use, not an approval or a quality grade. Here is what the label does and doesn't mean, and how regulators read it.
Peptide Purity Percentages Explained: What 98% and 99% Mean
A purity figure is a share of peak area on an HPLC trace, not a measure of how much peptide is in the vial. Here is what the numbers mean and what they leave out.
How to Verify a Certificate of Analysis and Spot a Fake
Simple checks that catch most fake or recycled certificates: matching batch numbers, confirming the report with the lab, and spotting signs of reuse or editing.
Storing Freeze-Dried Peptides in the Lab
Temperature, moisture, light and record-keeping for sealed lyophilized vials, and why a cold vial should warm up before anyone opens it.
Peptide Shipping and What to Check on Arrival
What sealed freeze-dried vials can handle in transit, why heat is the real risk, and a step-by-step check for the day the box arrives.
Red Flags When Choosing a Peptide Supplier
The warning signs that separate careful research suppliers from risky ones: untraceable paperwork, odd prices, off-label content, missing details and payment traps.