[1] [2] However, longstanding neurological complications, such as peripheral neuropathy or cognitive changes, may require three to six months of consistent treatment before significant improvement occurs, and some damage may be irreversible if treatment is delayed
For men, a normal hemoglobin level is 13.2 to 16.6 g/dL, and for women, 11.6 to 15 g/dL.[ref] A normal vitamin B12 level is usually defined as 400 pg/mL or higher
It may help alleviate conditions, such as arthritis, gastrointestinal disorders, and musculoskeletal injuries
Many people are deficient without knowing it especially those who eat plant-based diets, take certain medications, or are over 50