Kidney beans

Kidney beans are a very good source of cholesterol-lowering fiber, as are most other beans. In addition to lowering cholesterol, kidney beans' high fiber content prevents blood sugar levels from rising too rapidly after a meal, making these beans an especially good choice for individuals with diabetes, insulin resistance or hypoglycemia.

When combined with whole grains such as rice, kidney beans provide virtually fat-free high quality protein. But this is far from all kidney beans have to offer. Kidney beans are an excellent source of the trace mineral, molybdenum, an integral component of the enzyme sulfite oxidase, which is responsible for detoxifying sulfites. Sulfites are a type of preservative commonly added to prepared foods like delicatessen salads and salad bars. Persons who are sensitive to sulfites in these foods may experience rapid heartbeat, headache or disorientation if sulfites are unwittingly consumed. If you have ever reacted to sulfites, it may be because your molybdenum stores are insufficient to detoxify them.

Kidney Beans, cooked
1.00 cup
(177 grams)

Calories: 225
GI: low

NutrientDRI/DV

 molybdenum295%

 folate57.5%

 fiber45.3%

 copper42.2%

 manganese38%

 phosphorus34.8%

 protein30.7%

 vitamin B123.3%

 iron21.8%

 potassium20.4%

 magnesium18.5%

High-fiber foods

Women should try to eat at least 21 to 25 grams of fiber a day, while men should aim for 30 to 38 grams a day.

Fruits	Serving size	Total fiber (grams)*
Raspberries	1 cup	8.0
Pear, with skin	1 medium	5.5
Apple, with skin	1 medium	4.4
Strawberries (halves)	1 1/4 cup	3.8
Banana	1 medium	3.1
Orange	1 medium	3.1
Figs, dried	2 medium	1.6
Raisins	2 tablespoons	1.0
Grains, cereal & pasta	Serving size	Total fiber (grams)*
Spaghetti, whole-wheat, cooked	1 cup	6.2
Barley, pearled, cooked	1 cup	6.0
Bran flakes	3/4 cup	5.3
Oat bran muffin	1 medium	5.2
Oatmeal, quick, regular or instant, cooked	1 cup	4.0
Popcorn, air-popped	3 cups	3.5
Brown rice, cooked	1 cup	3.5
Bread, rye	1 slice	1.9
Bread, whole-wheat or multigrain	1 slice	1.9
Legumes, nuts & seeds	Serving size	Total fiber (grams)*
Split peas, cooked	1 cup	16.3
Lentils, cooked	1 cup	15.6
Black beans, cooked	1 cup	15.0
Lima beans, cooked	1 cup	13.2
Baked beans, vegetarian, canned, cooked	1 cup	10.4
Sunflower seed kernels	1/4 cup	3.9
Almonds	1 ounce (23 nuts)	3.5
Pistachio nuts	1 ounce (49 nuts)	2.9
Pecans	1 ounce (19 halves)	2.7
Vegetables	Serving size	Total fiber (grams)*
Artichoke, cooked	1 medium	10.3
Peas, cooked	1 cup	8.8
Broccoli, boiled	1 cup	5.1
Turnip greens, boiled	1 cup	5.0
Sweet corn, cooked	1 cup	4.2
Brussels sprouts, cooked	1 cup	4.1
Potato, with skin, baked	1 medium	2.9
Tomato paste	1/4 cup	2.7
Carrot, raw	1 medium	1.7

*Fiber content can vary between brands.

soluble and insoluble fiber

Color coding of table entries:

• Both Applies to both soluble and insoluble fiber
• Soluble Applies to soluble fiber only
• Insoluble Applies to insoluble fiber only

Dietary fiber functions and benefits

Functions	Benefits
Increases food volume without increasing caloric content, providing satiety	May reduce appetite
Attracts water and turns to gel during digestion, trapping carbohydrates and slowing absorption of glucose	Lowers variance in blood sugar levels
Lowers total and LDL cholesterol	Reduces risk of heart disease
Regulates blood sugar	May reduce onset risk or symptoms of metabolic syndrome and diabetes
Speeds the passage of foods through the digestive system	Facilitates regularity
Adds bulk to the stool	Alleviates constipation
Balances intestinal pH and stimulates intestinal fermentation production of short-chain fatty acids	May reduce risk of colorectal cancer

Fiber does not bind to minerals and vitamins and therefore does not restrict their absorption, but rather evidence exists that fermentable fiber sources improve absorption of minerals, especially calcium. Some plant foods can reduce the absorption of minerals and vitamins likecalcium, zinc, vitamin C, and magnesium, but this is caused by the presence of phytate (which is also thought to have important health benefits), not by fiber.

Fiber and Cancer

The addition of fiber in the diet aids in digestion and helps to avoid constipation. Vegetables, fresh fruits (especially dried fruits) and whole wheat, bran, or oatmeal cereals are excellent sources of fiber. To reap the benefits of fiber, it is very important to drink plenty of fluids.

Eating more fruits and vegetables helps provide a good supply of fiber, vitamin A, vitamin C, beta carotene and other carotenoids, and valuable substances called phytochemicals. Studies have shown that a diet high in these nutrients and fiber can reduce the risk of developing cancers of the stomach, colon rectum, esophagus, larynx, and lung.

Vitamin C and beta carotene, which forms vitamin A, are antioxidants. As such, they protect body cells from oxidation, a process that can lead to cell damage and may play a role in cancer.

In addition to nutrients that are needed for normal metabolism, plant foods also contain phytochemicals, plant chemicals that may affect human health. There are hundreds of phytochemicals, and their exact role in promoting health is still uncertain. However, a growing body of evidence indicates that phytochemicals may help protect against cancer.

To get these benefits, eat more fruits and vegetables that contain vitamins A and C and beta carotene. These include dark-green leafy vegetables such as spinach, kale, collards, and turnip greens. Citrus fruits, such as oranges, grapefruit, and tangerines are also high in antioxidants. Other red, yellow, and orange fruits and vegetables, or their juices are also healthful choices. Note: Juicing removes the fiber.