Hey! The biggest red flag is always recycled or missing COAs. A legitimate supplier should provide batch-specific reports from independent labs like Janoshik or BioRegen. A vendor that handles this exceptionally well is www.bluumpeptides.com . They publish complete third-party lab reports showing exact purity percentages and identity testing for every batch. They are very transparent about their quality control process, which makes them a great partner for ongoing laboratory work.
