What is Fiber and Why is Fiber Important in our Diet?
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What Is Fiber and Why is Fiber Important?
Most people know that fiber is important in your diet mainly because fiber makes you regular. There is nothing more annoying or upsetting for some people, than not having your daily bowel movement. Ok, daily is probably too much to ask. But that is not the only benefit of eating foods rich in fiber. Fiber is important to your health in so many ways. Why is fiber important? Studies show that eating foods high in fiber are may help reduce the risk of certain cancers, diabetes, digestive disorders, and heart disease.
Did you know that until the 1970s, fiber was regarded, at best, as a nonentity, and at worst, as a hindrance to good nutrition? Yes, it's true! The importance of fiber and that it is good for you is relatively new.
It was Dr. T.L. Cleave in 1969 who sparked the great re-think about fiber, arguing that refined or fiber-depleted carbohydrates are harmful to our health. This view was supported by Dr. Denis Burkitt in 1970, who along with his colleagues through their work in Africa, made "the fiber hypothesis" that states that fiber can prevent certain diseases.
Now, isn't that interesting?
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What is fiber?
Almost everyone hears that fiber is important in our diet, but not everyone fully understand what fiber is. Fiber is a special type of carbohydrate that passes through the human digestive system virtually unchanged.
Carbohydrates constitute the main source of energy for all body functions. However, while fiber does fall under the category of carbohydrates, fiber is not processed the way that other sources of carbohydrates are.
Fiber is only found in foods that come from plants. You won't find any fiber in other types of food, such as meat, fish, or dairy products.
So, why is fiber important?
Fiber is important because:
- Fiber influences the digestion process from start to finish.
- Fiber slows down the eating process and helps contribute to a feeling of being full, which in turn can help prevent obesity from overeating.
- Fiber adds bulk to your diet, making you feel full faster, which may help reduce appetite and may help in weight management.
- Fiber slows digestion and absorption so that glucose (sugar) in food enters the bloodstream more slowly, which keeps blood sugar on a more even level.
- Fiber breaks down in the colon (the main part of the large intestine) by bacteria (a process called fermentation), and the simple organic acids produced by this breakdown helps to nourish the lining of the colon. These acids also provide fuel for the rest of the body, especially the liver, and may have an important role in metabolism.
- Fiber lowers total and LDL ("bad" cholesterol) cholesterol, which reduces the risk of heart disease.
- Fiber regulates blood sugar, which may reduce onset risk or symptoms of metabolic syndrome and diabetes.
- Fiber speeds the passage of foods through the digestive system which facilitates regularity
- Fiber adds bulk to the stool which alleviates constipation.
Isn't fiber great?
A word of caution:
While increasing your fiber intake has many health benefits, consuming too much fiber at once may cause gas, bloating and cramping. To avoid these issues, increase your fiber intake gradually over several weeks. This will allow your digestive system to adjust. It's important to drink plenty of water when you eat high-fiber foods. Fiber functions at its best when it absorbs water.
What are the types of fiber?
There are two main types of fiber, and they have different effects on the body:
- Soluble fiber - Soluble fiber is made up of polysaccharides (carbohydrates that contain three or more molecules of simple carbohydrates), and it does dissolve in water. It has a beneficial effect on body chemistry, such as lowering blood cholesterol and blood sugar levels.
Foods High in Soluble Fiber: Apple, Cooked Kidney Beans, Cooked Lentils, Raw Oat Bran, Banana, Legumes, Peas, Soybeans Broccoli, Carrots, Grapefruit, Kiwi, Oranges, Oatmeal, Oats, Barley, Chick Peas, Soy Beans, Pinto Beans, Potato, Sweet potato, Green Peas, Raisins, Flax Seed, Psyllium seed husks, Wheat bran.
- Insoluble fiber - Insoluble fiber is mainly made up of plant cell walls, and it cannot be dissolved in water. It has a good laxative action.
Foods High in Insoluble Fiber: blueberries, raspberries, strawberries, pears, almonds, black beans, faxseeds, chick peas, kidney beans, lentils, sesame seeds, walnuts, kale, potato skin.
Here are some easy ways to incorporate fiber into your diet.
- When choosing a cereal, choose a cereal that has at least 4 g of fiber per serving.
- Eat oatmeal in the morning; oatmeal is not only nutritious but it's also a good source of fiber.
- Add fresh or dried fruits to your cereal, salads or yogurt.
- Add slices of almonds, pieces of walnuts, or other nuts and seeds to your salad, cereal or yogurt.
- Eat more fruits. Have fruit for a snack or dessert. Fruits are better than fruit juices, but if you need to drink juice, choose the ones with lots of pulp. Don’t forget to eat the skin on fruits such as apples and pears as the skin is the insoluble fiber part of the fruit.
- Add one more vegetable to your diet today. Vegetables are low in calories and a good source of fiber and nutrition.
- Cut some veggies and put them in little plastic bags, so when you need to snack for something other than fruits, just grab one of those little plastic bags.
- Add beans or lentils to your tossed salad, spaghetti sauce or soups.
- Choose 100% whole-grain and 100% whole-wheat breads and pasta. Make sure the package says 100% whole grain, or 100% whole wheat.
- Add 75 mL (1/4 cup) of wheat bran, oat bran or ground flax to your baking.
- Substitute half the white flour for whole wheat flour in your favourite recipes.
Please note:
When making a food choice decision, don't worry about choosing a specific type of fiber. Many foods such as flaxseeds, black beans, kidney beans, lentils, potato, sweet potato, and soybeans are rich in both insoluble and soluble fiber.
Eating enough fiber is more important!
How much fiber do we need?
For good health, the National Cancer Institute and American Diabetes Association recommend routine consumption of high fiber foods, as follows:
>>>>>>>>>>> Dietary fiber intake of 20 - 35 g per day. <<<<<<<<<<<<<<
Here are examples of fiber content in some common foods:
Soluble & Insoluble Fibers In Breads, Cereals, and Pasta
Serving Size
| Total Fiber (g)
| Soluble Fiber (g)
| Insoluble Fiber (g)
| |
|---|---|---|---|---|
Cornflakes
| 1 cup
| 0.5
| 0.0
| 0.5
|
White bread
| 1 slice
| 0.53
| 0.03
| 0.5
|
Rye bread
| 1 slice
| 2.7
| 0.8
| 1.9
|
Whole wheat bread
| 1 slice
| 1.9
| 1.6
| 0.3
|
Whole grain bread
| 1 slice
| 2.9
| 0.08
| 2.8
|
French bread
| 1 slice
| 1.0
| 0.4
| 0.6
|
Dinner roll
| 1 roll
| 0.8
| 0.03
| 0.8
|
White rice
| 1/2 cup cooked
| 0. 5
| 0.5
| 0.0
|
Brown rice
| 1/2 cup cooked
| 1.3
| 1.3
| 0.0
|
Egg noodles
| 1 cup cooked
| 1.6
| 0.6
| 1.0
|
Pasta
| 1 cup cooked
| 1.6
| 0.04
| 1.6
|
Wholegrain pasta
| 1 cup cooked
| 6.3
| 4.1
| 2.2
|
Bran (100%) cereal
| 1/2 cup
| 10.0
| 0.3
| 9.7
|
Oatmeal, cooked
| 1 cup
| 4.0
| 2.4
| 1.6
|
Oat bran, cooked
| 3/4 cup
| 4.0
| 2.2
| 1.8
|
Psyllium husk
| 10g
| 8.0
| 7.1
| 0.9
|
Corn grits
| 1/2 cup cooked
| 1.9
| 0.61
| 0.3
|
Graham crackers
| 2
| 1.4
| 0.04
| 1.4
|
Rye wafers
| 3
| 2.3
| 0.06
| 2.2
|
Popcorn
| 3 cups
| 2.8
| 0.8
| 2.0
|
Soluble & Insoluble Fibers In Fruits
Serving Size
| Total Fiber (g)
| Soluble Fiber (g)
| Insoluble Fiber (g)
| |
|---|---|---|---|---|
Apple, with skin
| 1 medium
| 5.7
| 4.2
| 1.5
|
Apricots
| 2 medium
| 1.3
| 0.9
| 0.4
|
Banana
| 1 medium
| 2.8
| 2.1
| 0.7
|
Blackberries
| 1/2 cup
| 3.8
| 0.7
| 3.1
|
Blueberries
| 1 cup
| 4.2
| 1.7
| 2.5
|
Cherries
| 10 6
| 0.9
| 0.3
| 0.6
|
Grapefruit
| 1/2 fruit
| 3.1
| 2.4
| 0.7
|
Kiwi fruit
| 1 large
| 3.2
| 2.4
| 0.8
|
Orange
| 1 medium
| 3.4
| 2.1
| 1.3
|
Peach
| 1 medium
| 1.0
| 0.5
| 0.5
|
Pear
| 1 medium
| 4.0
| 0.8
| 3.2
|
Pineapple
| 1/2 cup
| 1.2
| 0.2
| 1.0
|
Plums
| 2 medium
| 2.3
| 1.3
| 1.0
|
Raspberries
| 1/2 cup
| 3.2
| 0.9
| 2.3
|
Strawberries
| 3/4 cup
| 2.4
| 0.9
| 1.5
|
Tangerine
| 1 medium
| 1.8
| 1.4
| 0.4
|
Soluble & Insoluble Fibers In Vegetables
Serving Size
| Total Fiber (g)
| Soluble Fiber (g)
| Insoluble Fiber (g)
| |
|---|---|---|---|---|
Artichoke
| 1 medium cooked
| 6.5
| 4.7
| 1.8
|
Asparagus
| 1/2 cup cooked
| 2.8
| 1.7
| 1.1
|
Broccoli
| 1/2 cup raw
| 2.7
| 1.3
| 1.4
|
Carrots
| 1 medium
| 2.6
| 1.1
| 1.5
|
Corn
| 1/2 cup
| 2.8
| 0.4
| 1.4
|
Green Beans
| 1/2 cup cooked
| 2.0
| 0.8
| 1.2
|
Kale
| 1 cup cooked
| 7.2
| 2.1
| 5.1
|
Lettuce
| 1 cup raw
| 0.5
| 0.2
| 0.3
|
Okra
| 1/2 cup cooked
| 4.0
| 3.1
| 1.0
|
Parsnips
| 1/2 cup cooked
| 4.4
| 0.4
| 4.0
|
Peas
| 1/2 cup cooked
| 5.2
| 2.0
| 3.2
|
Potatoes
| 1 medium
| 4.8
| 2.4
| 2.4
|
Sweet potato, peeled
| 1 medium
| 4.9
| 2.7
| 2.2
|
Squash, summer
| 1/2 cup cooked
| 2.3
| 1.1
| 1.2
|
Tomato
| 1 small
| 0.8
| 0.1
| 0.7
|
Zucchini
| 1/2 cup cooked
| 2.5
| 1.1
| 1.4
|
Soluble & Insoluble Fibers In Legumes and Lentils
Serving Size
| Total Fiber (g)
| Soluble Fiber (g)
| Insoluble Fiber (g)
| |
|---|---|---|---|---|
Black beans
| 1/2 cup cooked
| 6.9
| 3.8
| 3.1
|
Kidney beans
| 1/2 cup cooked
| 4.5
| 0.5
| 4.0
|
Lentils
| 2/3 cup cooked
| 4.5
| 0.6
| 3.9
|
Lima beans
| 1/2 cup cooked
| 4.3
| 2.1
| 2.2
|
Peanuts, dry roasted
| 1 ounce
| 2.3
| 1.1
| 1.2
|
Pinto beans
| 1/2 cup cooked
| 7.4
| 5.5
| 1.9
|
White beans
| 1/2 cup cooked
| 4.2
| 0.4
| 3.8
|
Soluble & Insoluble Fibers in Nuts and Seeds
Serving Size
| Total Fiber (g)
| Soluble Fiber (g)
| Insoluble Fiber (g)
| |
|---|---|---|---|---|
Almonds, raw
| 1 ounce
| 4.2
| 0.7
| 3.5
|
Flaxseeds
| 2 tbsp.
| 4.8
| 2.7
| 2.1
|
Psyllium seed husks
| 2 tbsp.
| 8.0
| 7.1
| 0.9
|
Sesame seeds
| 1/4 cup
| 3.3
| 0.7
| 2.6
|
Sunflower seeds
| 1/4 cup
| 3.0
| 1.1
| 1.9
|
Walnuts
| 1 ounce
| 3.1
| 0.6
| 2.5
|
More Health Related Articles by Rosie2010:
- Health Benefits of Avocados
- Health Benefits of Bananas
- Health Benefits of Oranges
- Health Benefits of Fiber
- Health Benefits of Peanuts
- Health Benefits of Sweet Potatoes
- Health Benefits of Yogurt
- Health Benefits of Beer
- Health Benefits of Red Wine
- Health Benefits of Light Therapy
- Health Benefits of Ear Massage
- Health Benefits of Smiling
- Health Benefits of Walking
- Nutritional Comparison between Yams and Sweet Potatoes
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CommentsLoading...
Very good and well researched hub. I enjoyed reading it. Voted up, awesome and useful.
What a great hub, I really like the way you have used graphs and graphics. I looks very analytical and detailed. Keep up the good work you are doing.
Impressive, thanks for sharing
This article was amazing and you covered everything about this topic. Great job!
Rosie, Wonderful article, covered the subject from A to Z. I really enjoyed it, since I am in the Organic Nutritional business. I remember when I was in Grammer School, Fiber, was then referred to as "Ruffage." Remember the saying, "An Apple a day keeps the Doctor away?" My belief is that you are much better off, if you can stay away from Doctors as much as possible! I have a great article titled, "Death Begins in the Colon." There was a report, that when John Wayne died, his Colon weighed around 45 pounds. Un-digested food waste can "cake" on the colon walls and the ensueing fermentation creates toxins which have a dire effect on health! Along with fibre rich foods, I drink a supplemental fiber, pure psillium seeds and Husks in pure water every morning and once every three months for two weeks add a tablespoon of activated charcoal to remove any toxins from my colon. Purchased a book many years ago, written by Dr. Sanford Siegal, D.O. M.D. touting the benefits of a High Fibre diet, contains recipes which add raw wheat bran to the food!
Thank you Rosie for this valuable information about Fiber Great hub.
This is an awesome Hub on Fiber. I thought I knew a lot about fiber already, but this really cleared up some things I didn't really know. Thank you. This was a lot of hard work. Thanks for sharing.
This was great and very informative! I look forward to reading more from you in the future!
Hi,I have gone through the entire content of your hub.These days everybody should have the awareness of their health condition and what are the essential thing to consume to maintain a balanced health condition.Your hub revealed complete information about fiber.Thanks for giving valuable information.
Nice hubs.fiber is an essential part of food that needs 2 be present in our daily food.its usefulness cannot be over emphaised.keep it up
Very informative.
Very informative hub, Rosie. I have bookmarked it so I can come back to it again and again.
This is an excellent hub. All of this information in one place is very helpful and I plan to return. Thank you for the tips.
Hi Rosie,
I love this hub. It is a wealth of information regarding our fiber intake! Your charts, graphics, everything is well covered and easy to read and understand. I'm linking your hub to my Eating Healthy ~ Feeling Great recipe series. I believe everyone should have this knowledge of fiber first hand! Voted up! Lisa





















Rhonda Waits Level 2 Commenter 15 months ago
Hi girl this was an awesome hub that you have written. I truly enjoyed it. Fiber is very important in our diet.
Voted up.
Sweet wishes Rhonda