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it dictates the required concentration, route of administration, and frequency

Healthcare professionals should maintain heightened awareness when managing patients with multiple risk factors, as deficiency may develop insidiously over months to years before symptoms become apparent

Vitamin B12 As you age, your body loses some of its ability to absorb vitamin B12, and your risk of B12 deficiency increases

This includes vegans and vegetarians, older adults, individuals with atrophic gastritis, pernicious anemia, gastrointestinal disorders, those who have had gastrointestinal surgery and people who take certain medications including, but not limited to, estrogen (HRT), and birth control pills