Constipation occurs when the food you eat is digested slowly. As the bulk of food passes through your small intestine and into your large intestine, most of its nutrients have already been absorbed. The role of the large intestine is to extract excess water. When stool moves through your large intestines slowly, most of the water is taken out, leading to a hard, dry stool that is not easily passed by your colon. This is constipation. Adding fiber from fruits to your diet adds bulk and water to your feces, which may help with constipation.
Types of Fiber
There are two types of fiber: soluble and insoluble. Their names refer to their interaction with liquids. Soluble fiber dissolves in water and in doing so turns into gummy substance. Insoluble fiber does not mix with water and instead passes through your body relatively unchanged, making it of more use for constipation. Both types of fiber are not absorbed by your body, but still benefit the health of your digestive system. Several fruits contain both types of fiber.
Fiber and Constipation
Insoluble fiber may be the most benefit to easing constipation. Insoluble fiber, the kind of fiber that makes up the skin of may fruits, can aid in digestion. Insoluble fiber helps stimulate the muscles of the digestive system, making them stronger, which can help with constipation. Fiber also increases the weight, volume and pliability of your stools, which makes them easier to pass and reduces constipation. Most fruits are a good source of insoluble fiber.
High Fiber Fruits
Many fruits are high in fiber, especially those you eat with the skin on, such as pears and apples. The fruits richest in fiber include raspberries, pears, apples, strawberries, figs and raisins. Raspberries provide 8 g of fiber per 1 cup. One medium pear has 5.5 g and one medium apple provides 4.4 g. A 1 1/4-cup serving of strawberries has 3.8 g of fiber. Figs provide 1.6 g in two medium fruits and raisins give you 1 g in a 2 tbsp. serving.
Recommendations
Recommendations for fiber are aimed at keeping you healthy and preventing constipation. Intakes differ for men and women and by age. MayoClinic.com recommends that men under 50 eat 38 g per day and over 50, get 31 g per day. For women under 50, the recommendations are to consume 25 g per day. Over 50 years old, women need 21 g each day. You can also get fiber from vegetables and whole grains to reach this daily goal.
References
- "Anatomy and Physiology"; Kenneth S. Saladin; 2004
- Jackson Siegelbaum Gastroenterology; High Fiber Diet; Frank W. Jackson
- "Nutrition: Concepts and Controversies"; Francis Sizer and Eleanor Whitney; 2004
- MayoClinic.com; Dietary Fiber: Essential for a Healthy Diet; November 2009
- MayoClinic.com; High-Fiber Foods; November 2009



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