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In humans, cyanocobalamin must undergo intracellular enzymatic conversion to the active coenzyme formsmethylcobalamin and adenosylcobalaminwhich, depending on the pH environment, can interconvert with hydroxocobalamin ( Despite extensive biochemical knowledge of cobalamin metabolism and its physiological importance, the optimal supplementation route for maintaining or restoring adequate vitamin B12 levels remains debated
Vogiatzoglou A, et al
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Up to now, no adequate and well-controlled reproduction studies have been conducted in humans and animals to determine its effects on pregnant women (17)
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