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Methylcobalamin, on the other hand, is bioactive, meaning its ready for your body to put to work immediately
This is because vitamin B12 is bound to various carrier proteins in the blood: only a portion (the active B12) can be absorbed by your cells
However, the effects of prolonged exposure to this medicine on different organ systems and possible cumulative impact require further investigation
10.1016/S0165-6147(99)01318-8 389
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