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Connection Between Fiber, Colonic Microbiota, and Health Across the Human Life Cycle

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Dietary Fiber in Health and Disease

Part of the book series: Nutrition and Health ((NH))

Abstract

A symbiotic relationship has developed between fiber-rich dietary patterns and a healthy colonic microbiota over the course of millions of years of human evolution, which contributes to healthier energy metabolism and aging, and lower risk of chronic diseases, frailty in older age, and premature death. However, the present widespread intake of a Western pattern lower fiber diet has disturbed this relationship leading to a reversal of these health effects.

There is a critical balance between microbiota health and dysbiosis depending on the level of fiber in the diet. Fiber is the primary dietary source of microbiota-accessible carbohydrates required for fermentation to short chain fatty acids, which are the main colonocyte energy source and an important source of bioactive metabolites.

Adequate fiber intake supports a healthier colonic microbiota ecosystem, which decreases pathobionts, colonic permeability and endotoxemia, inflammation, colonic pH, and bowel transit time; increases symbionts, immune function, and fecal butyrate levels (an important colonic anti-inflammatory metabolite); and contributes to greater stool bulk to dilute potential toxic or carcinogenic compounds or metabolites.

Fiber-rich healthy dietary patterns help to promote a diverse, healthy colonic microbiota that has a critical role throughout the human life span, beginning with the promotion of a healthy infant immune function and subsequently protecting the colon from infections such as C. difficile, inflammatory bowel disease, and colorectal cancer; decreasing the risk of weight gain and obesity, type 2 diabetes and metabolic syndrome, and breast cancer; and delaying the aging process, including frailty and premature death.

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Appendices

Appendix 1. Fifty High-Fiber Whole or Minimally Processed Plant Foods Ranked by Amount of Fiber Per Standard Food Portiona

Food

Standard portion size

Dietary fiber (g)

Calories (kcal)

Energy density (calories/g)

High-fiber bran ready-to-eat cereal

1/3–3/4 cup (30 g)

9.1–14.3

60–80

2.0–2.6

Navy beans, cooked

1/2 cup cooked (90 g)

9.6

127

1.4

Small white beans, cooked

1/2 cup (90 g)

9.3

127

1.4

Shredded wheat ready-to-eat cereal

1–1 1/4 cups (50–60 g)

5.0–9.0

155–220

3.2–3.7

Black bean soup, canned

1/2 cup (130 g)

8.8

117

0.9

French beans, cooked

1/2 cup (90 g)

8.3

114

1.3

Split peas, cooked

1/2 cup (100 g)

8.2

114

1.2

Chickpeas (garbanzo) beans, canned

1/2 cup (120 g)

8.1

176

1.4

Lentils, cooked

1/2 cup (100 g)

7.8

115

1.2

Pinto beans, cooked

1/2 cup (90 g)

7.7

122

1.4

Black beans, cooked

1/2 cup (90 g)

7.5

114

1.3

Artichoke, global or French, cooked

1/2 cup (84 g)

7.2

45

0.5

Lima beans, cooked

1/2 cup (90 g)

6.6

108

1.2

White beans, canned

1/2 cup (130 g)

6.3

149

1.1

Wheat bran flakes ready-to-eat cereal

3/4 cup (30 g)

4.9–5.5

90–98

3.1–3.3

Pear with skin

1 medium (180 g)

5.5

100

0.6

Pumpkin seeds, whole, roasted

1 ounce (about 28 g)

5.3

126

4.5

Baked beans, canned, plain

1/2 cup (125 g)

5.2

120

0.9

Soybeans, cooked

1/2 cup (90 g)

5.2

150

1.7

Plain rye wafer crackers

2 wafers (22 g)

5.0

73

3.3

Avocado, Hass

1/2 fruit (68 g)

4.6

114

1.7

Apple, with skin

1 medium (180 g)

4.4

95

0.5

Green peas, cooked (fresh, frozen, canned)

1/2 cup (80 g)

3.5–4.4

59–67

0.7–0.8

Refried beans, canned

1/2 cup (120 g)

4.4

107

0.9

Mixed vegetables, cooked from frozen

1/2 cup (45 g)

4.0

59

1.3

Raspberries

1/2 cup (65 g)

3.8

32

0.5

Blackberries

1/2 cup (65 g)

3.8

31

0.4

Collards, cooked

1/2 cup (95 g)

3.8

32

0.3

Soybeans, green, cooked

1/2 cup (75 g)

3.8

127

1.4

Prunes, pitted, stewed

1/2 cup (125 g)

3.8

133

1.1

Sweet potato, baked

1 medium (114 g)

3.8

103

0.9

Multigrain bread

2 slices regular (52 g)

3.8

140

2.7

Figs, dried

1/4 cup (about 38 g)

3.7

93

2.5

Potato baked, with skin

1 medium (173 g)

3.6

163

0.9

Popcorn, air-popped

3 cups (24 g)

3.5

93

3.9

Almonds

1 ounce (about 28 g)

3.5

164

5.8

Whole wheat spaghetti, cooked

1/2 cup (70 g)

3.2

87

1.2

Sunflower seed kernels, dry roasted

1 ounce (about 28 g)

3.1

165

5.8

Orange

1 medium (130 g)

3.1

69

0.5

Banana

1 medium (118 g)

3.1

105

0.9

Oat bran muffin

1 small (66 g)

3.0

178

2.7

Vegetable soup

1 cup (245 g)

2.9

91

0.4

Dates

1/4 cup (about 38 g)

2.9

104

2.8

Pistachios, dry roasted

1 ounce (about 28 g)

2.8

161

5.7

Hazelnuts or filberts

1 ounce (about 28 g)

2.7

178

6.3

Peanuts, oil roasted

1 ounce (about 28 g)

2.7

170

6.0

Quinoa, cooked

1/2 cup (90 g)

2.7

92

1.0

Broccoli, cooked

1/2 cup (78 g)

2.6

27

0.3

Potato baked, without skin

1 medium (145 g)

2.3

145

1.0

Baby spinach leaves

3 ounces (90 g)

2.1

20

0.2

Blueberries

1/2 cup (74 g)

1.8

42

0.6

Carrot, raw, or cooked

1 medium (60 g)

1.7

25

0.4

  1. aDietary Guidelines Advisory Committee. Scientific Report. Advisory Report to the Secretary of Health and Human Services and the Secretary of Agriculture. Part D. Chapter 1: Food and nutrient intakes, and health: current status and trends. 2015;97–8; Table D1.8
  2. Slavin JL. Position of the American Dietetic Association: Health implications of dietary fiber. J Am Diet Assoc. 2008;108:1716–31
  3. U.S. Department of Agriculture and U.S. Department of Health and Human Services. Dietary Guidelines for Americans, 2010. 7th Edition, Washington, DC: U.S. Government Printing Office. 2010; Table B2.4; http://www.choosemyplate.gov/. Accessed 22 Aug 2015
  4. Dahl WJ, Stewart ML. Position of the Academy of Nutrition and Dietetics: health implications of dietary fiber. J Acad Nutr Diet. 2015;115:1861–70

Appendix 2. Comparison of Western and Healthy Dietary Patterns Per 2000 Kcals (Approximated Values)a

Components

Western dietary pattern (USA)

USDA base pattern

DASH diet pattern

Healthy Mediterranean pattern

Healthy vegetarian pattern (Lacto-ovo based)

Vegan pattern

Emphasizes

Refined grains, low-fiber foods, red meats, sweets, and solid fats

Vegetables, fruits, whole grains, and low-fat milk

Potassium-rich vegetables, fruits, and low-fat milk products

Whole grains, vegetables, fruit, dairy products, olive oil, and moderate wine

Vegetables, fruits, whole grains, legumes, nuts, seeds, milk products, and soy foods

Plant foods: vegetables, fruits, whole grains, nuts, seeds, and soy foods

Includes

Processed meats, sugar-sweetened beverages, and fast foods

Enriched grains, lean meat, fish, nuts, seeds, and vegetable oils

Whole grains, poultry, fish, nuts, and seeds

Fish, nuts, seeds, and pulses

Eggs, nondairy milk alternatives, and vegetable oils

Nondairy milk alternatives

Limits

Fruits and vegetables, whole grains

Solid fats and added sugars

Red meats, sweets, and sugar-sweetened beverages

Red meats, refined grains, and sweets

No red or white meats, or fish; limited sweets

No animal products

Estimated nutrients/components

Carbohydrates (% total kcal)

51

51

55

50

54

57

Protein (% total kcal)

16

17

18

16

14

13

Total fat (% total kcal)

33

32

27

34

32

30

Saturated fat (% total kcal)

11

8

6

8

8

7

Unsat. fat (% total kcal)

22

25

21

24

26

25

Fiber (g)

16

31

29+

31

35+

40+

Potassium (mg)

2800

3350

4400

3350

3300

3650

Vegetable oils (g)

19

27

25

27

19–27

18–27

Sodium (mg)

3600

1790

1100

1690

1400

1225

Added sugar (g)

79 (20 tsp.)

32 (8 tsp.)

12 (3 tsp.)

32 (8 tsp.)

32 (8 tsp.)

32 (8 tsp.)

Plant food groups

Fruit (cup)

≤1.0

2.0

2.5

2.5

2.0

2.0

Vegetables (cup)

≤1.5

2.5

2.1

2.5

2.5

2.5

Whole grains (oz.)

0.6

3.0

4.0

3.0

3.0

3.0

Legumes (oz.)

–

1.5

0.5

1.5

3.0

3.0+

Nuts/seeds (oz.)

0.5

0.6

1.0

0.6

1.0

2.0

Soy products (oz.)

0.0

0.5

–

–

1.1

1.5

  1. U.S. Department of Agriculture, Agriculture Research Service, Nutrient Data Laboratory. 2014. USDA National Nutrient Database for Standard Reference, Release 27. https://www.ars.usda.gov/northeast-area/beltsville-md/beltsville-human-nutrition-research-center/nutrient-data-laboratory/docs/usda-national-nutrient-database-for-standard-reference/. Accessed 17 Feb 2015
  2. Dietary Guidelines Advisory Committee. Scientific Report. Advisory Report to the Secretary of Health and Human Services and the Secretary of Agriculture. Appendix E-3.7: Developing vegetarian and Mediterranean-style food patterns. 2015; 1–9
  3. aU.S. Department of Agriculture and U.S. Department of Health and Human Services. Dietary Guidelines for Americans, 2010. 7th Edition, Washington, DC: U.S. Government Printing Office. 2010; Table B2.4; http://www.choosemyplate.gov/. Accessed 22 Aug 2015

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Dreher, M.L. (2018). Connection Between Fiber, Colonic Microbiota, and Health Across the Human Life Cycle. In: Dietary Fiber in Health and Disease. Nutrition and Health. Humana Press, Cham. https://doi.org/10.1007/978-3-319-50557-2_4

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