Tag Archives: Dietary fiber

Why We Need Dietary Fiber

DietaryFiberJacquieIconBy Jacquie Eubanks

The basic building blocks of a healthy, nutritious diet consists of carbohydrates, proteins, fats and lest we forget, water. By choosing the healthiest forms and proper balance of each of these foods, you enable your body to function at an optimal level. One other necessary and very important part of a healthy balanced diet is fiber. Naturally occurring fiber is found only in plant-based foods and is actually the part of the plant that is resistant to the digestive process. As a result, only a small percentage of fiber is metabolized. The bulk of fiber passes through the intestines undigested, aiding bowel health and providing critical support for colon function. A diet that includes a wide variety of high-fiber foods provides celluloses, lignans, pectins, oligosaccharides and other fibers and consequently, a greater amount of health benefits.

Basically, fiber can be typed as soluble or insoluble. Soluble fiber disperses in water and has a high water holding capacity, becoming gelatinous as it travels through the digestive tract. Soluble fiber aids in reducing cholesterol levels and helps to slow glucose absorption, thereby helping to stabilize blood sugar levels. Insoluble fiber does not change form, tends to prevent constipation and speeds up the rate that food passes through the digestive system, stabilizing colon pH levels, eliminating toxins and providing valuable protection against colorectal cancer. Many plant-based foods will contain both soluble and insoluble fibers. Raw vegetables, fruits, nuts, legumes and 100% whole grains all contain good amounts of health promoting dietary fibers.

Unfortunately, the typical American diet is lacking in fiber and, according to The Journal of Nutrition, current fiber intakes are alarmingly low. So low, in fact, that inadequate fiber intake has become a public health concern, as low fiber intake is associated with risk factors for many highly prevalent and preventable chronic diseases, including cardiovascular disease, metabolic syndrome, inflammation, obesity and type 2 diabetes. While some clinicians and nutritionists feel the recommended fiber intakes of 38 grams for men and 25 grams for women are too low, The Institutes of Medicine reports that only 3% of Americans are consuming adequate amounts of fiber and that the average consumption is only half of the recommended amounts.

With two-thirds of American adults overweight yet undernourished, current dietary guidelines support increased consumption of nutrient-dense and fiber-containing foods along with decreased consumption of refined and processed foods. With the Centers for Disease Control and Prevention (CDC) reporting that only 33% of adults meet the RDA of 2 servings of fruits and 27% meet the RDA of a minimum of 5 servings of veggies, those who wish to achieve optimal intakes would require considerable behavior and dietary changes. Fiber’s role in promoting health is often overlooked. While short term benefits, such as constipation relief, are indeed helpful, the long term benefits of increased and adequate fiber consumption include reduced cardio-metabolic risks, sustained weight control and lowered daily glucose levels, especially for diabetics.

The first challenge to achieving recommended daily intakes requires a careful selection of foods. Realistically, consumers can increase their fiber intake by switching from refined grains to whole grains, opting for whole grain cereals and increasing legume, vegetable and fruit consumption. According to the CDC, getting fruits and vegetables from farms to consumers is challenging but huge efforts are underway on a state-by-state basis to increase the availability of affordable, healthier food choices. As whole foods provide nutritive benefits in addition to fiber, increasing the intake of nutrient dense whole foods is optimal.

For those who do not reach the RDA of fiber through diet alone, supplementation that includes both soluble and insoluble fibers is a great way to promote the wide-ranging benefits of increased fiber intake. In order to meet individual needs or preferences and simplify supplementation, supplemental fiber is available in a variety of forms, which can include psyllium, flaxseeds, beta-glucans, inulin, celluloses, and oligofructans. Psyllium is a good intestinal cleanser, laxative and stool softener. Cellulose helps relieve constipation and removes cancer-causing substances from the colon wall. Lignans help to lower cholesterol and provide support for cognitive function, especially in postmenopausal women. Pectins help to remove toxins, lower cholesterol and reduce the risks of heart disease, while glucomannans assist with weight control and aid in normalizing blood sugar, cholesterol and triglyceride levels.

If you are taking prescription medications or have diabetes, be sure to check with your healthcare practitioner before starting on a fiber regimen. To avoid interference with the absorption of certain medications, do not take fiber supplements at the same time as medications.

Professional Supplement Center offers these and other high quality fiber supplements:

Organic Triple FiberMax PowderOrganic Triple FiberMax Powder by Advanced Naturals – Formulated with 3 types of 100% organic fibers to promote regularity, support cardiovascular health and help lower cholesterol, this quality product contains organic flaxseed, oat bran and acacia fiber. No additional ingredients.


Fiber Plus CapsFiber Plus Caps by Ortho Molecular – This natural fiber supplement contains organic psyllium powder, rice bran, apple pectin, fig, and prune plus probiotic lactobacillus acidophilus in support of healthy bowel function, regularity and long term bowel maintenance. Gluten free formulation.


Fiber FormulaFiber Formula by Integrative Therapeutics – Formulated with both soluble and insoluble fibers, this product supports colon health, aids in toxin elimination and promotes regularity. Wheat, dairy and soy free formulation.


MediBulk (SP621)MediBulk by Thorne Research – This powdered formula contains soluble and insoluble fibers in support of optimal digestive health, toxin elimination and maintenance of normal cholesterol and blood sugar levels already within the normal range. Gluten, soy and dairy free formulation.

The Journal of Nutrition: Filling America’s Fiber Intake Gap. http://jn.nutrition.org/content/early/2012/05/28/jn.112.160176.full.pdf
Balch, Phyllis A. CNC. Prescription for Nutritional Healing. Penguin Group, 2010.
Majority of Americans not Meeting Recommendations of Fruit and Vegetable Consumption. http://www.cdc.gov/media/pressrel/2009/r090929.htm
Guilliams, Thomas G. Ph.D. Supplementing Dietary Nutrients. Point Institute, 2014.
Higher dietary intake of lignans is associated with better cognitive performance in postmenopausal women. http://www.ncbi.nlm.nih.gov/pubmed/15867302

All About Dietary Fiber

dietaryfiberBy Jacquie Eubanks BSN, RN

Dietary fiber, or roughage, is a carbohydrate found in the structural material of plants including the leaves, stems and roots.  Dietary fiber is present in all plant foods such as fruits, vegetables, whole grains, legumes, nuts and seeds.  Fiber is indigestible and stays intact until it nears the end of the digestive system.  Fiber has a low glycemic index, helping to avoid large insulin spikes after a meal and having a beneficial effect on insulin sensitivity.    

There are two basic types of fiber and each has its own functions.  Both types of fiber are important for health, digestion and prevention of health conditions such as heart disease, diabetes and obesity

  • Soluble fiber –  This type of fiber dissolves in water to form a gel-like substance in your digestive tract.  Soluble fibers slow down the movement of food through the digestive system, delaying the emptying of stomach contents, and keeping that feeling of fullness for longer periods of time.  Soluble fiber plays an important role in lowering LDL cholesterol by interfering with the absorption of dietary cholesterol. 
  • Insoluble fiber –  Sometimes called cellulose, this fiber has a thick, rough texture that does not dissolve in water.  Insoluble fibers absorb water as they move through the digestive tract and tend to accelerate the movement of food and waste.  Insoluble fiber is considered gut healthy as it tends to have a laxative effect, helping to keep bowels regular. 

Fiber is an essential part of the diet.  With the increase of processed and refined foods, the American diet has seen a decrease in the amount of fiber consumed.  On a daily basis, the majority of Americans currently get about half of the recommended amounts of fiber.  A general recommendation for female adults is 21-25 grams of dietary fiber per day.  For adult males, 30- 38 grams of fiber daily.  Dietary fiber is beneficial because it:

  • Helps to lower blood cholesterol and triglyceride levels.
  • Lowers the risk of colon cancer, heart disease, and digestive conditions such as diverticulitis.
  • Improves blood sugar levels in type 2 diabetics and aids in prevention.   
  • Helps control weight by adding bulk to the diet.
  • Keeps the digestive system healthy and regulates bowel action. 
  • Speeds up the transit time through the intestines to aid in elimination of waste and toxins. 

Soluble and insoluble fiber can be found in different foods and also in different parts of the same food.  Insoluble fiber tends to be found in the peels and husks of plant foods and soluble fiber in the fleshy interior.  To ensure that you are getting enough fiber and to get a healthful balance of both types of fiber, look to whole foods and grains.  Fiber-rich foods tend to improve the overall quality of your diet as they are rich in vitamins, minerals and disease-fighting phytochemicals.  Because the body doesn’t break down fiber, you don’t get an appreciable amount of calories, which explains why you can eat a large salad or a lot of vegetables and still eat very few calories. 

Sources of soluble fiber include oatmeal, oat bran, apples, oranges, strawberries, raspberries, beans and legumes, fruits, potatoes and root vegetables.    

Sources of insoluble fiber include corn, brown rice, bran, whole grains, nuts and seeds, vegetables with fibrous skin, and fruit peels. 

Balanced sources of both soluble and insoluble fiber could include, sunflower, sesame, pumpkin and flax seeds. 

Food labels list the amount of fiber per serving but don’t distinguish between the fiber types. It pays to read labels when looking to increase your fiber intake as labels can claim a “good source of fiber” if it contains 2.5 grams, and an “excellent source of fiber” if it contains 5 grams.  Increase fiber-rich foods gradually to give your digestive system time to adapt.  Be sure to consume plenty of water and stay well hydrated.  It’s easy to add fiber to your diet when you think in terms of whole foods – a piece of fruit instead of juice, a high-fiber breakfast cereal, whole grain bread as opposed to refined white bread, and plenty of fresh fruits and vegetables. 

Supplements to increase fiber intake:

MediBulk (SP621)
MediBulk (SP621) by Thorne Research –  MediBulk contains psyllium, pectin, and prune powder as sources of soluble fiber in a convenient powder form for ease of mixing. 
MetaFiber by Metagenics –  MetaFiber is a low-allergy-potential fiber blend designed to support healthy intestinal transit time and bowel regularity.  One serving provides approximately 83% insoluble and 17% soluble dietary fiber.
Fiber Clear
Organic Fiber-Clear by Advanced Naturals –  Organic Fiber-Clear is a natural source of dietary fiber that helps provide the 25-35 grams of recommended daily fiber.  Made with only 100% organic acacia (a soluble fiber), it dissolves in liquids and soft foods for a convenient fiber boost and can be added to any food without altering the original texture or flavor.