Diet
Diet can help control symptoms in some patients with suspected or confirmed SIBO. Diet does not replace medical evaluation, and it does not necessarily eradicate overgrowth.
What Diet Can Do
Diet may reduce:
- bloating
- gas
- abdominal discomfort
- diarrhea related to fermentable carbohydrate intake
- symptom flares while medical treatment is being planned
Low-FODMAP Approach
Some patients improve with temporary reduction of fermentable carbohydrates. A low-FODMAP approach is usually intended as a structured trial, followed by reintroduction to identify tolerated foods.
It should not be treated as a permanent maximal restriction diet.
Elemental Diets
Elemental diets are sometimes discussed for SIBO but are restrictive, difficult to tolerate, and should be medically supervised. They are not appropriate as casual self-treatment.
Risks of Over-Restriction
Long-term restrictive diets can cause problems, including:
- inadequate calories
- micronutrient deficiencies
- unnecessary food avoidance
- worsening constipation
- social restriction
- food-related anxiety
When to Involve a Dietitian
A dietitian is especially useful if the patient has:
- weight loss
- anemia or nutrient deficiencies
- multiple food restrictions
- pregnancy
- inflammatory bowel disease
- celiac disease
- diabetes
- eating disorder history
- recurrent symptoms despite treatment
Practical Principle
Use diet as a symptom-management tool, not as proof of diagnosis.