side effect of b12 injections Vitamin Effects Why Do I Feel Worse

Deficiency in this vitamin can lead to neurological symptoms such as numbness, tingling, and memory problems

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Foods such as cheese, avocado, nuts, eggs, fatty fish, and meat tend to be more effective than high-carbohydrate foods

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If serum B12 is below 300 pg/mL, further testing is warranted

For most people, this is about 10 days, but for the immunocompromised, this is around 20 days