Dietary Fiber Tied to Lower Dementia Risk

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Dietary Fiber Tied to Lower Dementia Risk

Eating a high-fiber diet, especially one rich in soluble fiber, is linked to a lower risk of incident disabling dementia, new research shows.

Investigators administered a dietary survey to 3700 healthy adults at midlife and then followed them for up to 20 years. They found that participants who consumed the most fiber had approximately a 25% lower risk of developing dementia in later life.

“This study showed that people with a high intake of dietary fiber, especially soluble fiber, have a lower risk of dementia,” study investigator Kazumasa Yamagishi, MD, PhD, professor, Department of Public Health Medicine, Faculty of Medicine and Health, Services Research and Development Center, University of Tsukuba, Japan, told Medscape Medical News.

“Dietary fiber is a nutrient found in grains, potatoes, vegetables, and fruits and is known to affect intestinal bacteria,” Yamagishi said. “Recently, some experimental studies have shown that intestinal bacteria may be involved in cognitive functions as well as diseases of the digestive tract. However, there have been no studies that have actually examined the relationship between dietary fiber intake and the subsequent risk of dementia in large numbers of general people.”

The study was published online February 6 in Nutritional Neuroscience.

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