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Should you eat more dietary fiber? New study says it depends

Date:
June 25, 2024
Source:
Cornell University
Summary:
Nutritionists generally advise everyone to eat more dietary fiber, but a new study suggests that its effects on health can vary from person to person. The findings indicate that recommendations should be tailored to each individual's gut microbiome.
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Nutritionists generally advise everyone to eat more dietary fiber, but a new Cornell University study suggests that its effects on health can vary from person to person. The findings indicate that recommendations should be tailored to each individual's gut microbiome.

The study, published in Gut Microbes, focused on resistant starch, a category of dietary fiber found in such foods as bread, cereals, green bananas, whole-grain pasta, brown rice and potatoes.

The researchers identified the gut microbe species that change in response to two different types of resistant starch. They found evidence that each individual may have a unique response to eating a resistant starch, with some people benefiting and others experiencing little or no effect. The reason appears tied to the level of diversity and composition of a person's gut microbiome.

"Precision nutrition definitely has a use in determining what dietary fiber we should tell people to eat," said Angela Poole, assistant professor of molecular nutrition and senior author of the study.

"This is critical because we've had public messaging advising people to eat more dietary fiber for decades," Poole said. "At the same time, less than 10% of people eat the recommended intake. Since there are many different types of dietary fiber and carbohydrates, a better strategy would be to collect data on each person and tell them which dietary fiber they can eat to get the most bang for their buck."

In the study, Poole and colleagues tested three dietary treatments on 59 participants over seven weeks.

The study was supported by the President's Council of Cornell Women and the National Institutes of Health.


Story Source:

Materials provided by Cornell University. Original written by Krishna Ramanujan, courtesy of the Cornell Chronicle. Note: Content may be edited for style and length.


Journal Reference:

  1. Sri Lakshmi Sravani Devarakonda, Dorothy K. Superdock, Jennifer Ren, Lynn M. Johnson, Aura (Alex) P. Loinard-González, Angela C. Poole. Gut microbial features and dietary fiber intake predict gut microbiota response to resistant starch supplementation. Gut Microbes, 2024; 16 (1) DOI: 10.1080/19490976.2024.2367301

Cite This Page:

Cornell University. "Should you eat more dietary fiber? New study says it depends." ScienceDaily. ScienceDaily, 25 June 2024. <www.sciencedaily.com/releases/2024/06/240625204900.htm>.
Cornell University. (2024, June 25). Should you eat more dietary fiber? New study says it depends. ScienceDaily. Retrieved July 12, 2024 from www.sciencedaily.com/releases/2024/06/240625204900.htm
Cornell University. "Should you eat more dietary fiber? New study says it depends." ScienceDaily. www.sciencedaily.com/releases/2024/06/240625204900.htm (accessed July 12, 2024).

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