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You can expect hematologic markers like hemoglobin to move toward normal within a few weeks to a few months depending on severity and replacement schedule
We strongly recommend it, but no - you do not have to have one if you choose not to, though we do explain why this is storngly recommended
However, if you are not comfortable with giving yourself a vitamin B12 shot then you should not try it
Common side effects may include: Dizziness Pain, swelling, or itching at the injection site Diarrhea Nausea Skin rash or acne-like skin Unwell or feeling of weakness Serious side effects may include: Difficulty breathing Swelling of the face, lips, or tongue Irregular heartbeats or palpitations Swelling or pain in the limbs due to blood clots Severe dizziness or weakness This list does not cover all potential side effects, and others may occur
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Evaluate Nutritional Needs: Assess your dietary intake of B12 and see if you meet your daily requirements
