Best things to eat during diarrhoea according to std textbook
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Now I have solid textbook content. Let me compile a thorough answer from what I've gathered across multiple standard textbooks.
Here is what standard medical textbooks say about the best things to eat (and drink) during diarrhoea:
Diet During Diarrhoea - Standard Textbook Guidance
1. The Core Principle: Early Refeeding is Recommended
Harrison's Principles of Internal Medicine (22nd ed.) is explicit: "Early refeeding is safe, well tolerated, and clinically beneficial." The old practice of "bowel rest" or prolonged fasting is not recommended. Nutrition should be started as soon as possible, particularly because malnutrition increases the risk of diarrhoea-related death in vulnerable populations.
2. Oral Rehydration - The Priority
Before food, fluid and electrolyte replacement is the cornerstone of treatment.
What to drink:
- Oral Rehydration Solution (ORS) is the gold standard. The WHO/UNICEF standard formula is 245 mOsm/L containing: sodium 75 mmol/L, glucose 75 mmol/L, potassium 20 mmol/L, chloride 65 mmol/L, citrate 10 mmol/L. It works by leveraging the intact sodium-glucose cotransport in the gut.
- Over-the-counter ORS brands (e.g., Pedialyte, Electral) are appropriate.
What to avoid drinking:
- Fruit juices and sugary drinks - the high sugar content can worsen diarrhoea by osmotic effect (Tintinalli's Emergency Medicine)
- Sports drinks - not equivalent to ORS; inappropriate electrolyte concentration, especially in children
- Plain water alone in large quantities, especially in infants, can cause electrolyte disturbances
- Soda/pop - too much sugar, not enough salt
3. Diet: Return to Normal Food as Soon as Possible
Tintinalli's Emergency Medicine states clearly: "Your child should return to his or her normal diet as soon as possible. A special diet is not necessary."
Goldman-Cecil Medicine adds: for rapid transit diarrhoea, "treatment goals are to restore hydration and nutrition... replacing with iso-osmolar or hypo-osmolar oral rehydration solutions. The fat content in the diet should be reduced."
Best foods to eat:
- Starchy, easily digestible foods - rice, bread, potatoes, crackers (these are low in fat and fibre, and easy on the gut)
- Bananas - soft, easily digested, and a natural source of potassium (lost during diarrhoea)
- Boiled or steamed vegetables
- Lean proteins - boiled chicken or fish (low-fat sources)
- Yoghurt - may help restore gut flora (probiotics); Goldman-Cecil notes probiotics may help reduce diarrhoea volume
In infants specifically:
- Continue breastfeeding - breast-feeding reduces diarrhoeal losses and the need for ORS. Harrison's, Goldman-Cecil, and Tintinalli's all emphasize this point strongly
- Formula-fed infants: continue usual formula - no need to switch to diluted or lactose-free formula in most cases
4. Foods to Avoid During Diarrhoea
| Category | Reason |
|---|---|
| High-fat foods (fried, greasy) | Worsen diarrhoea, slow recovery |
| High-sugar drinks (juice, soda) | Osmotic effect worsens stool output |
| High-fibre foods (raw vegetables, bran) | Increase stool bulk and gut motility |
| Dairy (in some) | Transient lactase deficiency can follow acute gastroenteritis |
| Spicy foods | Irritate an already inflamed gut mucosa |
| Alcohol and caffeine | Stimulate gut motility |
5. Zinc Supplementation
Goldman-Cecil Medicine recommends zinc supplementation for children >6 months with diarrhoea in developing areas where zinc deficiency is prevalent - it "significantly reduces diarrhoea volume." The WHO also recommends this as standard practice.
Summary Table
| What to Have | What to Avoid |
|---|---|
| ORS (Electral, Pedialyte) | Fruit juices, soft drinks |
| Rice, boiled potatoes, plain bread | Fried or fatty foods |
| Bananas | Spicy foods |
| Boiled chicken or fish | Raw vegetables / high-fibre foods |
| Yoghurt / probiotics | Alcohol, caffeine |
| Continue breastfeeding (infants) | Cow's milk (if post-infectious lactose intolerance) |
Sources:
- Harrison's Principles of Internal Medicine, 22nd ed. - "Rehydration and Nutrition"
- Goldman-Cecil Medicine - "Hydration" and "Rapid Transit Dysmotility of the Small Bowel"
- Tintinalli's Emergency Medicine - "What should I give my child to eat and drink?"
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