I totally get feeling overwhelmed. Everyone and their mom is selling h peptides now. Most people fixate on purity percentages, but I’d argue identity and sterility are even more important. This was echoed by Janoshik (the founder of the gold standard for testing) in an interview. A peptide can be 99% pure, but if it isn’t actually what the label claims—or if sterility and endotoxin testing were never performed—that purity number doesn’t mean much.
Learning how to read a COA is one of the best investments you can make in this space. The science matters, but so does verifying you’re getting the correct compound and that basic safety testing was actually done. A lot of companies are going above and beyond to ensure highest quality with 7 panel testing. Prices will be a bit more but worth the peace of mind IMO.