Fiber fits in two categories, insoluble and soluble, depending upon its ability to dissolve (or not dissolve) in water. Some foods contain both soluble and insoluble fiber, whereas others are predominant in only one. The key is to eat a variety of fiber-rich foods each day and receive the beneficial effects from both types.
Soluble Fiber
Water-soluble fiber readily dissolves in water. Technically speaking, soluble fibers include pectins, gums, and mucilages. It’s obvious, however, that these terms won’t be of any help to you in your grocery store. Translated into “real-food” terminology, you’ll find soluble fiber in the following:
Oats Brown rice Barley Oat bran Dried beans and peas Rye Seeds Vegetables (especially carrots, corn, cauliflower, and sweet potatoes) Fruits (especially apples, strawberries, oranges, bananas, nectarines, and pears)
Why all the hoopla? Well for starters, foods rich in soluble fiber have been shown to help decrease blood cholesterol, therefore reducing the risk of heart disease. Another benefit comes from its ability to slow the absorption of glucose (sugar in the blood), which might in turn help control blood-sugar levels in diabetics.
Insoluble Fiber
The type of fiber that does not readily dissolve in water is called water-insoluble. Insoluble fiber includes lignin, cellulose, and hemicellulose. Once again, converted into understandable food terms, we are talking about the following:
Wheat bran Corn bran Whole-wheat breads and cereals Fruits Vegetables (especially potatoes with skin, parsnips, green beans, and broccoli)
As you can see, some foods are mentioned on both lists, indicating that they provide both soluble and insoluble fiber. Insoluble fiber is primarily responsible for accelerating intestinal transit time, along with increasing and softening stools. In other words, insoluble fiber is responsible for “moving things along.” In addition to promoting regularity, insoluble fiber has been shown to decrease your risk for hemorrhoids and diverticulosis.
Lowering Your Cholesterol Level
If your cholesterol tends to be a bit high, or you’d just like to maintain an already low number, you might want to increase your soluble fiber. Soluble fibers have been shown to bind with cholesterol and pull it out of the body. Fruits, vegetables, legumes, oats, and all foods made with oat bran can therefore reduce your risk for heart and artery disease by lowering blood cholesterol. Another thought is that high-fiber foods can displace some of the high-fat, artery-clogging foods in your diet—a double impact!
Feeling Fuller with Less Food
Did you ever feel as though a plate of vegetables expanded in your stomach after you ate it? Well, it did! Eating fiber-rich foods can make you feel full because they absorb water and swell inside you. You might also feel full longer if you choose a meal with some soluble fiber. Unlike insoluble fiber, which quickly moves food through your body, soluble fiber tends to stick around a while, keeping you full and satisfied. Does this mean you’ll lose weight from eating a lot of fiber? It does if you eat these foods instead of the high-fat, high-calorie stuff. If you eat them in addition to all the junky food, your chance of becoming slim is slim.
