- Many people with irritable bowel syndrome (IBS) fail to get enough fiber or micronutrients.
- A 4-week stint of diet low in fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs) reduced diet quality in this study, but the clinical significance is uncertain.
Why this matters
- FODMAP restriction improves symptoms in most patients, but few data reflect the quality or diversity of this diet.
- At baseline:
- Only 5% of participants met recommended fiber intake.
- Many were also not consuming adequate iodine, magnesium, iron, or selenium.
- Vast majority were consuming too much salt and sugar.
- Formal diet quality and diversity scores were low.
- Low-FODMAP diet led to slightly lower diet-quality scores vs habitual diet, but diversity was similar.
- Secondary analysis of 2 randomized controlled trials of adults with IBS at a tertiary center (n=130).
- Authors evaluated habitual nutrient intake, diet quality, and diversity among IBS patients with low-FODMAP diet (n=63) vs without (sham exclusion diet, n=48; habitual diet, n=19).
- Outcome: intake at baseline vs 4 weeks.
- Funding: National Institute for Health Research.
- Short-term study.
- May not apply to patients who do not receive dietitian counseling.