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Oral forms may be considered for general wellness or digestive support, while topical forms may be discussed for localized skin or tissue concerns
All described studies evaluating small intestinal permeability used a 5 or 6 h urinary collection to assess small intestinal permeability, which may have confounded the results since a large amount of the sugars were probably already localized in the colon by the end of the urine collection (33)
for people without a deficiency, evidence for additional benefit is limited, and B12 injections are not FDA approved for weight loss
Standard ranges fail to identify patients with subclinical vitamin B12 deficiency (which means many patients may not have full-blown symptoms of vitamin B12 deficiency but they do experience some) 3
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