Dietary fiber–Isn’t that stuff that you find in certain foods that make them taste really bad? Well, sometimes, but not always…
Though I personally cringe at the thought of sitting down to a breakfast of Bran Buds or similar types of cereals, we should be more cognizant of our dietary fiber intake.
Most people fail to consume the recommended amount of dietary fiber or what’s commonly referred to as “roughage” in our diets.
Many people simply lack an understanding of the importance of dietary fiber, how much they actually need to consume per day, or what the difference between soluble and insoluble fiber. For those people, help is here: Dr. Morrow’s Dietary Fiber Cheat Sheet!
What Is Dietary Fiber?
Dietary fiber is a relatively broad term that includes many plant components that share the characteristics of being indigestible. This means that dietary fiber is not digested, absorbed by the body , or used for energy. There are two main sources of dietary fiber–soluble fiber and insoluble fiber. *Note many plant sources include both soluble and insoluble fiber.
The net effect of insoluble fiber is that it promotes regular bowel movements. Additionally, insoluble fiber helps us to feel full which may reduce obesity. It also may reduce our risk of developing hemorrhoids.
Food Sources of Insoluble Fiber:
- Whole-wheat products
- Corn bran
- Brown rice
- Certain vegetables (Carrots, celery, tomatoes)
Dietary Sources of Soluble Fiber:
- Oatmeal
- Beans
- Fruits such as apples, plums, kiwi, pears, blackberries, strawberries, raspberries, peaches, citrus fruits, dried apricots, prunes, and figs.
- Some vegetables (dried peas, beans, and lentils)
Potential Health Benefits of Dietary Fiber:
- Helps prevent constipation
- May reduce risk of colon cancer
- May reduces LDL cholesterol and cardiovascular risk
- May reduce the risk of developing type 2 diabetes
- Helps to increase satiety and reduce caloric intake
How Much Dietary Fiber Do You Need Per Day? (New Guidelines)
25 g for adult women
38 g for adult men
How Much Soluble vs. Insoluble Fiber?
It really doesn’t matter so much, both types are important, just try to consume more fiber!
“Few fiber supplements have been studied for physiological effectiveness, so the best advice is to consume fiber in foods.” (Slavin et al, 2008).
References:
- Bazzano LA. Effects of soluble dietary fiber on low-density lipoprotein cholesterol and coronary heart disease risk. Curr Atheroscler Rep. 2008 Dec;10(6):473-7.
- Slavin JL. Position of the American Dietetic Association: health implications of dietary fiber. J Am Diet Assoc. 2008 Oct;108(10):1716-31.


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