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Although food can be the source of vitamin b12, there are certain conditions that do not favor the cobalamin absorption or make it excretes out of the body in large amount
B12 injections vs tablets at a glance This comparison is a general guide, not a treatment recommendation
Sasha Santhakumar, What is the link between vitamin B12 and Crohn's disease
Most research protocols use 200500 micrograms per day administered through subcutaneous injection
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