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However, this doesn't mean you can just leave it on a sunny windowsill
During training, monthly or seasonal Vitamin B12 injections can be considered to keep you energized, sharp and increase stamina during training
Incidentally, the healthy reference range is 191-663 pg/ml and correlates closely with oral cobalamin intake, which is why the vitamin B12 blood level alone is not an adequate parameter to diagnose a deficiency (Herrmann and Obeid, 2014)
It is metabolized in the liver and it is excreted in the urine, bile and secretions
2 mcg/mL
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