A recent study suggests that those with Irritable Bowel Syndrome eat a diet that meets or exceeds UK Dietary Reference Values. The study surveyed the eating habits of 104 people with Irritable Bowel Syndrome & then compared their answers against nutritional guidelines to come up with their findings.
Essentially this means that someone with Irritable Bowel Syndrome is most likely not at fault for any nutritional deficiencies they may have as the foods they are eating should contain the nutrients they need. The study did not find any differences in nutrient intake between those with different subtypes of Irritable Bowel Syndrome(diarrhea dominant, constipation dominate or alternating). The study does not appear to have actually looked into if those surveyed actually had malabsorption of nutrients despite eating a nutrient rich diet.
This study just reaffirms what many already know, that people with Irritable Bowel Syndrome aren’t purposefully eating nutrient deficient diets.