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Who Might Suffer from a B12 Deficiency

Special populations Certain groups should exercise caution when taking vitamin B12 supplements: Pregnant and breastfeeding women : Vitamin B12 is required during pregnancy and breastfeeding to prevent cognitive and developmental delays, but taking only the recommended amounts is essential

Injections are indicated when there's confirmed severe deficiency, pernicious anemia (an autoimmune condition where intrinsic factor is absent), or documented malabsorption that prevents oral B12 from reaching adequate levels

In other cases, maintenance doses may be needed every few months