Dietary fiber is the edible part of plant cell walls that gives plants its structure. Because it is undigestible it is not considered a nutrient, but it does aid in digestion, helps promote weight loss, helps regulate blood sugars and had been found to offer protection against certain diseases. There are two types of fiber, soluble and insoluble.

Insoluble fiber does not dissolve in water, and has also been known as “roughage”. It is found in whole-wheat products, nuts, seeds, dark green leafy vegetables, and in the skins of fruit and vegetables, such as potatoes and green beans. Here’s a list of some of the ways insoluble fiber works in your body:

1. It makes you feel full, and promotes a reduction in over-eating and weight loss.

2. It stimulates the intestinal wall to contract and relax which helps food move through the intestinal tract, acting as a natural laxative.

3. It adds bulk and softness to the stool, which promotes regularity and prevents constipation and hemorrhoids.

4. It allows waste to move through the colon quickly. This is important in preventing harmful substances from staying in the intestinal tract and coming in contact with the intestinal lining. 

5. It help prevent colon cancer by keeping an optimal pH in intestines to prevent microbes from producing cancerous substances.

Soluble fiber dissolves in water. Some good sources of soluble fiber are: oats and oat bran, barley, nuts, apples, carrots, legumes, psyllium husk and flaxseed. In your body, soluble fiber:

1. Promotes weight loss by slowing down digestion (you feel full faster).

2. Helps reduce your risk of diabetes by controlling blood sugar: The gradual absorption of digested food helps control the amount of glucose that enters your blood stream.  

3. Helps reduce your risk of heart disease.

4. Appears to help lower cholesterol. The pectin in some soluble fibers binds to fatty substances, preventing the absorption in your body and instead aids in their excretion.

When trying to add more fiber to your diet, remember to choose whole grains (including breads, cereals, and pasta), replace white rice with brown rice, and choose whole fruits and vegetables instead of canned or in the form of juices. If you have questions or would like more personalized information for your body’s needs, feel free to contact us. We’d love to hear from you.

Dorothy Lizak

Nutrition & Wellness Specialist

References:

Nelson, Miriam E. Strong Women Eat Well, Berkeley Publishing Group. 2001

http://www.myfooddiary.com/resources/ask_the_expert/soluble_insoluble_fiber.asp

http://www.healthcastle.com/fiber-solubleinsoluble.shtml

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