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Many symptoms of B12 deficiency develop gradually, and patients who have experienced deficiency before often become attuned to their body's warning signs
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Possible Side Effects While generally well-tolerated, some individuals may experience mild side effects such as: Pain, redness, or swelling at the injection site Mild diarrhea or stomach upset Allergic reactions like rash, itching, or dizziness in rare cases Headache or flushing due to niacinamide content Any persistent or severe symptoms should be reported to a healthcare professional promptly
Archived from the original on 16 November 2019
Your body relies on B12 for: Forming healthy red blood cells, which carry oxygen to every part of you