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Sometimes the liver cannot convert cyanocobalamin into adequate amount of methylcobalamin needed for proper neuronal functioning
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But the calculation error potential is massive
This makes injections the superior choice for optimal effectiveness in these scenarios
However I came off Lymecycline in July & had my b12 shot and spots came back
Nayana Shetty, MBBS, MD When to See a Doctor Although rare, some people may experience side effects of high vitamin B12 levels such as headaches or skin reactions
Age, certain medications, stomach conditions, and plant-based diets can all interfere with absorption
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