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Plus, because B12 vitamin is bound to amino acids (found in protein foods) and is only released when certain enzymes and stomach acids are present, its possible to consume enough but still remain somewhat deficient
A standard serum B12 test can be misleading because it measures the total amount of B12 floating around in your blood, not what's actually available for your cells to use
It is also involved in the metabolism of carbohydrates, fats, and proteins
The non-toxicity of Vitamin B12 is confirmed by the US National Institute of Health Office of Dietary Supplements which states that the US Institute of Medicine has not established any upper limit for B12 because of its low toxicity
Learn who needs vitamin B12 shots and the reasons for B12 shots in this article
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