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Heres a comprehensive guide to help you understand how much liquid B12 you should take daily: General recommendations According to the National Institutes of Health (NIH), the recommended dietary allowance for healthy adults is 2.4 mcg (micrograms) of vitamin B12 per day
This varies from person to person depending on your individual metabolism, activity levels and how deficient you were to start with
Medical Tests and Evaluations Vitamin B12 deficiency can be diagnosed with a blood test that measures the level of the vitamin in your blood
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