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That is a bit of a catch-22 because B12 is essential for the intestines to be able to function optimally, but they cannot absorb it (from the food) when they are damaged or diseased
This vitamin primarily acts as an enzyme cofactor, helping with DNA and energy production
Every withdrawal keeps that ratio, so the components cannot be dosed independently
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Although most of it is present in the blood, it is not directly available to your body
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