Digestive problems and IBS
Bloating, pain, constipation or diarrhoea, including irritable bowel syndrome.
24 findings across 12 topics. Strongest evidence: Psyllium Husk (A), Zinc (A), Low FODMAP Diet (B).
Grades show how certain the evidence is, not how big the effect is. How we grade evidence
What helps
Psyllium Husk
- Improves overall symptoms of irritable bowel syndrome — Benefit, grade A: Strong
- Relieves constipation and improves stool consistency — Benefit, grade A: Strong
Zinc
- Reduces diarrhea and infection risk in deficiency — Benefit, grade A: Strong
Low FODMAP Diet
- Eases IBS symptoms — Benefit, grade B: Moderate
- Reduces bloating — Benefit, grade B: Moderate
- Relieves belly pain in IBS — Benefit, grade B: Moderate
Probiotics
- Eases irritable bowel syndrome symptoms — Benefit, grade C: Limited
- Prevents C. difficile diarrhoea — Benefit, grade C: Limited
- Prevents diarrhoea caused by antibiotics — Benefit, grade C: Limited
Kiwifruit
- Eases constipation-related abdominal discomfort — Benefit, grade C: Limited
- Helps you have more bowel movements — Benefit, grade C: Limited
Yogurt and Kefir
- Yogurt and kefir help people with lactose intolerance digest lactose — Benefit, grade C: Limited
Carnivore Diet
- Eases inflammatory bowel disease symptoms — Benefit, grade C: Limited
Boswellia
- Shortens acute diarrhoea — Benefit, grade C: Limited
Ginger
- Helps stomach emptying (digestion) — Benefit, grade C: Limited
Mixed evidence
Peppermint Oil
- Eases IBS symptoms — Mixed results, grade C: Limited
- Relieves belly pain in IBS — Mixed results, grade C: Limited
Low FODMAP Diet
- Keeps IBS symptoms better over time — Mixed results, grade C: Limited
- Works better than other diets — Mixed results, grade C: Limited
Kiwifruit
- Kiwifruit extracts and supplements help constipation — Mixed results, grade C: Limited
Apple Cider Vinegar
- Can cause digestive side effects — Mixed results, grade C: Limited
Oats
- Can cause gas and digestive upset — Mixed results, grade C: Limited
Doesn't seem to help
Low FODMAP Diet
- Changes bowel habits — No effect, grade B: Moderate
Peppermint Oil
- Helps children with IBS — No effect, grade C: Limited