Dr. Oz shows Oprah how to get enough fiber.

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Question 2: How much fiber should you eat every day?
A) 10 grams
B) 15 grams
C) 25 grams
D) 55 grams

The correct answer is C.

While people should be eating about 25 grams of fiber a day , Dr. Oz says the average American gets only 10 grams of fiber a day. And if you're not getting enough fiber, it will be difficult to get that S-shaped poop.

If you're looking to increase your fiber intake, don't do it all at one meal. Instead, try to get in meals throughout your day. "Obviously you can get them through the vegetables and fruits that you eat," Dr. Oz says as he points out several fiber-rich choices to Oprah. Other foods that are good sources of fiber include whole wheat pasta, whole wheat bread, steel cut oatmeal, peas and lentils.

"Recognize we don't have a main course item here, right? Our fiber comes from around the main course. … This meal right here has 25 grams in a day. So it's not magic."