Irritable bowel syndrome is a widespread condition that is characterized by pain and gastrointestinal discomfort with varying degrees of diarrhea and constipation. There can be a number of underlying causes, but diet plays a major role. Also, there is evidence that being deficient in B-vitamins, vitamin D, magnesium, calcium, iron, and zinc may be a contributing factor. In addition, strict dieting as part of the disease management may result in nutrient deficiencies, according to a review article that is published in Gastroenterology and Hepatology.

Biotin, one of the B vitamins, is essential for numerous metabolic processes, and a biotin deficiency may be associated with inflammatory bowel disease (IBD). According to a new study that is published in Nutrients, a biotin deficiency can also have a negative impact on the intestinal flora and result in a suppression of symbiotic bacteria and a replication of harmful, dysbiotic bacteria. The scientists say that a disrupted gut flora caused by a biotin deficiency may contribute to inflammatory bowel disorders.