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Frontiers in immunology , 598
If you experience unexpected symptoms whilst taking B12, discuss with your GP whether continued supplementation is necessary or whether dose adjustment might help
Typical injection dosages can range from: 1,000 mcg (1 milligram) given weekly, monthly, or on a less frequent schedule depending on the severity of the deficiency and the individuals response
If a lab report shows high B12 levels, the most likely explanation is also the most reassuring one: vitamin B12 is going into your body from outside
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