Sent GLOW, KLOW, and the TB BPC blend to a lab after 30 days refrigerated. 99.6% purity before. 99.6% purity after. Same milligram content. No measurable degradation. These blends are professionally formulated and Peptide storage guide: : r NTNPerformance BPC 157 Body Protection Compound Vivaprime BPC 157 *10 vials PRIME STATE Most people don't ruin peptides in the syringe. They ruin them in storage. Peptides are delicate signaling molecules. Heat, light and unstable temperatures slowly degrade their structure long before the first injection