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.