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PMC6914810 Boehm U et al
Just as vitamin B-12 deficiency causes unpredictable results, too much of it can also cause unknown results
two exceptions to this are in , where in the year 2000 oral vitamin B Canada and Sweden 12 accounted for 73% of the total vitamin B 12 prescribed
But Theres This Theory There are some folks who feel that its smart to increase B12 intake surrounding exercise because while lifting weights increases protein synthesis, it also increases protein breakdown
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