Cyanide is a poison, of course, but in the minuscule quantities found in Cyanocobalamin, this is of no consequence its perfectly safe to take
BPC157 is a COA-verified peptide, tested 99 % purity (HPLC verified) by BT Labs
Chem Biol 10:233239 Li F, Tang S-C (2017) Targeting metastatic breast cancer with ANG1005, a novel peptide-paclitaxel conjugate that crosses the blood-brain-barrier (BBB), vol 4
Asparagine followed by larger amino acids deamidates more slowly because the larger side chains sterically hinder the cyclization reaction that drives deamidation
Additionally, S-doping increased hydrophilicity and reduced the charge transfer resistance of FeN-C materials, collectively enhancing electrocatalytic activity and durability