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Seek immediate medical attention if you develop hives, swelling, difficulty breathing, or chest tightness
Theyre often given to people with certain health issues or who follow special diets
Leading medical sources, including The BMJ and Harvards Nutrition Source, emphasize that elevated B12 levels alone do not indicate toxicity or adverse effects
In fact, some of these food sources naturally contain vitamin B12 while some sources are fortified with the vitamin
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