In his book, "Abundant Health", Julius Gilbert White lists several special causes of indigestion

1. Eating too fast. Food needs to be mixed with saliva.
2. Overeating. This applies even to good food.
3. Meals too close together. For most people, 4 or 5 hours between meals is needed.
4. Eating between meals. This weakens the stomach.
5. Eating a large evening meal or late at night. Digestion should be nearly finished before retiring.
6. Eating when tired, and especially when exhausted.
7. Loss of sleep. Nervousness. Mental depression.
8. Eating unripe fruit, spoiled fruit or condiments.
9. Eating bread which was not well-baked. If the inside can be squeezed into a dough, do not eat it.
10. Eating yeast bread which is not 24 hours old.
11. Eating vinegar, fried foods, or complex mixtures.
12. Eating vegetables and most fruits at the same meal.
13. Eating milk and sugar together, as in ice cream. This is because sugar ferments quickly, yet is enfolded in the milk which digests slowly.
14. Eating too much liquid food.
15. Eating sugar, tea, coffee, cocoa, liquor, etc.
16. Drinking with meals. This dilutes the stomach juices.

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