The Digestive Dilemma: Can B12 Vitamins Cause Diarrhea?
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4 min read
In the U.S. and U.K., vitamin B12 deficiency affects about 6% of people under 60 and nearly 20% of those over 60 [1.8.1]. While supplementing is common, many wonder: can B12 vitamins cause diarrhea? Yes, this can occur, particularly with high doses [1.2.1, 1.2.3].