10. Rhubarb

The laxative effects of Rhubarb, a popular ingredient in making pies, have been attributed to the high levels of the bowel-stimulating compound, sennoside A, which it contains. The compound, more commonly known as Senna, decreases water absorption from the colon into the blood stream, keeping stools hydrated and soft, making them easier to pass out.

Rhubarb also contains 2.2 grams of dietary fiber, 9% of the recommended daily amount, which adds to its effectiveness in relieving constipation.