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doi: 10.1016/S2542-5196(17)30023-2 247

140 The mechanism by which blood excess vitamin B 12 occurs in patients in the intensive care unit is not clear, but some factors that may partially explain it include: 1) the elevated plasma levels of the cobalamin-carrier proteins, the transcobalamins I and III

Four-week studies using 10mg twice weekly consume the full vial

Int Psychogeriatr 2012;24(10):15361552
The data so far is reassuring - trials on 43,500 people discovered no safety concerns, although mild side effects, such as headaches and muscle aches, have been reported
