Digestive health depends on a balance of enzymes like pepsin and beneficial bacteria. Understanding lactose intolerance and how pH affects digestion can help alleviate common issues like bloating, fatigue after eating, and chest discomfort.
To extract nutrients from the foods you eat, they must be small enough for the cells of your small intestine to absorb. The process of digestion reduces your food particles to a size sufficient for absorption to occur.
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The bulk of a lettuce headβs weight -- almost 95 percent, according to caloriefacts.org -- comes from water, with the remainder primarily from carbohydrates. Lettuce also contains nominal amounts of protein and fat, although these nutrient levels are so small they do not contribute greatly to your nutrition.
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The primary nutrient in white bread is starch, with two slices providing more than 20 g of starch, according to the U.S. Department of Agriculture National Nutrient Database. White bread also contains protein and small amounts of fat and other sugars.
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Eating too much of any one food component can affect your digestion. Grease, in particular, can impact how your body digests a meal because of the specific chemistry of the fats you eat. A high intake of fatty foods may result in indigestion and cause gastrointestinal distress.
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