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High Dietary Fiber Consumption is Not Associated With Gastrointestinal Discomfort in a Diet Intervention Trial

  • ARCHANA JAISWAL MCELIGOT
    Correspondence
    Address correspondence to: Dr. John P. Pierce, Department of Family and Preventive Medicine, University of California, San Diego, CA 93093-0645.
    Affiliations
    A. J. McEligot is an assistant adjunct professor in the Epidemiology Division, Department of Medicine at University of California, Irvine, USA
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  • ELIZABETH A GILPIN
    Affiliations
    C. L. Rock and K. A. Hollenbach are associate professors, V. Newman is an associate clinical professor, and J. P. Pierce is a professor in the Department of Family and Preventive Medicine, and E. A. Gilpin is a professor and director of biostatistics for the Cancer Center, at University of California, San Diego, La Jolla, California, USA
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  • CHERYL L ROCK
    Affiliations
    C. L. Rock and K. A. Hollenbach are associate professors, V. Newman is an associate clinical professor, and J. P. Pierce is a professor in the Department of Family and Preventive Medicine, and E. A. Gilpin is a professor and director of biostatistics for the Cancer Center, at University of California, San Diego, La Jolla, California, USA
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  • VICKY NEWMAN
    Affiliations
    C. L. Rock and K. A. Hollenbach are associate professors, V. Newman is an associate clinical professor, and J. P. Pierce is a professor in the Department of Family and Preventive Medicine, and E. A. Gilpin is a professor and director of biostatistics for the Cancer Center, at University of California, San Diego, La Jolla, California, USA
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  • KATHRYN A HOLLENBACH
    Affiliations
    C. L. Rock and K. A. Hollenbach are associate professors, V. Newman is an associate clinical professor, and J. P. Pierce is a professor in the Department of Family and Preventive Medicine, and E. A. Gilpin is a professor and director of biostatistics for the Cancer Center, at University of California, San Diego, La Jolla, California, USA
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  • CYNTHIA A THOMSON
    Affiliations
    C. A. Thomson is an assistant professor at the Arizona Cancer Center at University of Arizona, Tucson, USA
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  • JOHN P PIERCE
    Affiliations
    C. L. Rock and K. A. Hollenbach are associate professors, V. Newman is an associate clinical professor, and J. P. Pierce is a professor in the Department of Family and Preventive Medicine, and E. A. Gilpin is a professor and director of biostatistics for the Cancer Center, at University of California, San Diego, La Jolla, California, USA
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      Specific levels of fiber intake are not defined as a daily dietary goal (
      ). However, the National Cancer Institute (NCI) has provided a quantitative guideline for dietary fiber intake (
      ). In its 1995 dietary guidelines, NCI advocated a dietary fiber intake of 20 to 30g/d—with an upper level of 35g/d—from various sources such as vegetables, fruits, and whole grains. The upper limit was set at 35g/d to reduce any risk of adverse effects from dietary fiber. Nonetheless, very few controlled randomized trials have examined the adverse gastrointestinal effects of a high dietary fiber intake (>35g/d), and a majority of the evidence supporting the association between fiber and increased bloating and discomfort is based on clinical observations (
      ).
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