why is pernicious anemia treated with injections of vitamin b12 Understanding and Deficiency | Muhammad Qasim posted on the topic Vitamin B12 Deficiency - Harvard

Diphosphopyridine Nucleotide (oxidised) Molecular formula (free acid, reference): C 21 H 27 N 7 O 14 P 2 Molecular weight (free acid, reference): ~663.4 g/mol CAS (reference): 53-84-9 Form: Lyophilised powder Appearance: White to off-white solid Note: Exact values may vary by salt/hydration state (e.g., disodium salt, hydrates)

Energy benefits, especially in B12-depleted patients, are often felt within the first 1 to 2 weeks

However, it has been suggested that the risk of cognitive impairment and white matter damage in the elderly is elevated even when serum B12 is within 250350 pmol/L (50)

Improves symptoms of depression and polycystic ovary syndrome