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 Most Powerful Peptide for Muscle Building and Physical Performance (Mitochondria Enhancer) Experience KLOW Peptide Results in Just 2 Weeks The Power of Peptides in Skincare Medik8 Glow Peptide Protocol GHK Cu, BPC 157, TB 500 Neurogan Health