Used as a treatment for vitamin B12 deficiency, particularly in cases of pernicious anemia and malabsorption syndromes. It is also the preferred form of vitamin B12 for treating cyanide poisoning, as it binds to cyanide to form cyanocobalamin, which is then excreted in urine. Commonly administered via injection due to poor oral absorption in deficient patients. Also used in certain neurological and metabolic disorders linked to B12 deficiency. Well tolerated with low toxicity, making it suitable for long-term therapy in chronic conditions.