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You may need a supplement if you: Eat a vegetarian or vegan diet and dont consume enough foods that contain the vitamins Take heartburn medications Have had weight loss surgery Have a disease that affects your stomach lining or gut, such as IBD or Crohns disease Have or are at risk of getting age-related macular degeneration (AMD) Are older and dont get enough B vitamins through your diet In many cases, you may not need a B complex supplement, but a single B vitamin supplement

For best results, yes

If you take acid-reducing medications, talk to your doctor about increasing your vitamin B12 levels

Furthermore, the nutrient is crucial during pregnancy to reduce the risk of birth defects of the brain or spine as well