how long for vitamin b12 injection to take effect Injections How Quickly Does a B12

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Frequently Asked Questions People with low B12 levels due to poor absorption, certain medical conditions, or strict vegetarian/vegan diets may need B12 injections to restore healthy levels

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The diet allows as much water, coffee, and tea as you want

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For example, a 2019 study of over 9,000 adults found people with obesity had lower blood levels of vitamin B12 (8)