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.
If you use leaf lettuce or romaine, where you lose about a third of each in preparation, you'll need about 23 pounds to yield 15 finished pounds. A. You need about 15 pounds of cut lettuce to feed 75 people, resulting in a portion size a little above 3 ounces.Taking into account the loss of about a quarter of each head of lettuce, you'll need to buy 20 pounds of heads to yield 15 pounds of edible greens.f you use leaf lettuce or romaine, where you lose about a third of each in preparation, you'll need about 23 pounds to yield 15 finished pounds. A. You need about 15 pounds of cut lettuce to feed 75 people, resulting in a portion size a little above 3 ounces.