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Staying Energized: Your B12 Maintenance Plan Once your B12 levels are back within a healthy range, you can switch to a maintenance plan
So, if your vitamin B12 deficiency is due to an autoimmune disease in which your stomach doesn't make intrinsic factor, supplements might not work for you, and you will need injections
Individuals with absorption issues : Some people have trouble absorbing B12 from food or supplements
Oral drugs undergo what is known as first-pass metabolism. First-pass metabolism is when the concentration of a drug, specifically when administered orally, is significantly reduced before it reaches systemic circulation
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