fiber:
Until very recently, the functions of a specific type of fiber were determined by whether or not the fiber was classified as soluble or insoluble. Soluble fibers, such as the type found in oat bran, are known to reduce blood cholesterol levels and normalize blood sugar levels.
On the other hand, insoluble fiber, such as the type found in wheat bran, are known to promote bowel regularity. Many commonly used plant sources of fiber contain both soluble and insoluble fibers. Psyllium husks, for example, contain a mixture of 70% soluble and 30% insoluble fibers.
Despite the widespread use of the terms "soluble" and "insoluble" to describe the health benefits of dietary fiber, many medical and nutrition experts contend that these terms do not adequately describe the physiological effects of all the different types of fiber.
These experts are now proposing the use of the terms "viscous" and "fermentability" in place of soluble and insoluble to describe the functions and health benefits of dietary fiber.
Despite the widespread use of the terms "soluble" and "insoluble" to describe the health benefits of dietary fiber, many medical and nutrition experts contend that these terms do not adequately describe the physiological effects of all the different types of fiber.
These experts are now proposing the use of the terms "viscous" and "fermentability" in place of soluble and insoluble to describe the functions and health benefits of dietary fiber.
Categories of Dietary Fiber
- Cellulose, found in bran, legumes, peas, root vegetables, cabbage family, outer covering of seeds, and apples
- Hemicellulose, found in bran and whole grains
- Polyfructoses (Inulin and Oligofructans)
- Galactooligosaccharides
- Gums, found oatmeal, barley, and legumes.
- Mucilages
- Pectins, found in apples, strawberries, and citrus fruits
- Lignin, found in root vegetables, wheat, fruits with edible seeds (such as strawberries)
- Resistant Starches, found in ripe bananas, potatoes
