These substances cause excessive amounts of water to remain in the stool, leading to diarrhea. Certain foods (such as some fruits and beans) and sugar substitutes in dietetic foods, candy, and chewing gum (for example, hexitols, sorbitol, and mannitol) can cause osmotic diarrhea.
The four most common types of green lettuce -- green leaf, romaine, butterhead and iceberg -- have 13 to 17 calories in 100 grams, which is about a 1/2-cup serving of shredded lettuce. They deliver 1 gram of protein, or about 2 percent of the recommended daily intake.
Romaine lettuce is super rich in beta-carotene, with approximately 4,094 international unit (IU) of vitamin A in one cup, says the USDA. One cup of iceberg lettuce, however, only contains 361 IU of vitamin A. Vitamin A, a fat-soluble vitamin, is important for your vision, immune system, and reproductive system.inner: Romaine. Vitamin K. Romaine lettuce provides 48 micrograms of vitamin K in a one-cup serving while iceberg lettuce only provides 17 mcg, says ODS. Vitamin K helps your blood to clot appropriately and regulate insulin.