B12 is responsible for several processes within the body, like red blood cell formation and the production of DNA
"Glucocorticoids, chronic stress, and tendon pathology." Scand J Med Sci Sports
The product sold by clinics is a synthetic 15-amino-acid peptide manufactured by "solid-phase synthesis", administered under the skin, into the muscle or a joint, or intravenously, often at higher doses for weeks
B12 (Cyanocobalamin) Vitamin B12, essential for DNA synthesis, fatty acid metabolism, and amino acid metabolism
The 28-day multi-use window typically cited for Bacteriostatic Water-reconstituted compounds and reflecting the bacteriostatic preservation duration under recommended storage and handling conditions , covers the majority of standard pre-clinical research protocol durations