My Sunday facial before and after..After 18 KLOW injections. I can't get enough of the science behind this!! The peptides I use test at 99% purity. That is as high as a 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 Inflammation triggered self immolative conjugates enable oral peptide delivery by overcoming gastrointestinal barriers Science Advances Best Peptides for Muscle Growth (Complete Guide 2026)