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Vitamin B12 deficiency may also occur in people who have had intestinal surgery, including weight loss surgery
For instance, variations in genes related to drug metabolism, such as CYP450 enzymes, can lead to differences in drug clearance rates and effectiveness
Role of the gut microbiota in inflammatory bowel disease pathogenesis: what have we learnt in the past 10 years
Wiley Online Library, John Wiley & Sons
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