Food Technology Magazine | Applied Science

Filling the Fiber Gap

This column explores the fiber gap in the United States, outlines trends driving fiber intake, and offers practical strategies for adding more fiber to the diet for gut health.

By Renee Korczak, Joanne Slavin

September 5, 2025

Americans aren’t getting enough fiber in their diets; this is not new news. The Dietary Guidelines for Americans (DGAs) identified fiber as a nutrient of public health concern back in 2005and since then not much has changed (DGA 2005–2010, DGA 2020–2025). Adult women and men require 25 g and 38 g, respectively, of fiber daily, but on average, data from the National Health and Nutrition Examination Survey shows that men and women consume about 16 g of fiber daily from foods and beverages (USDA AR…

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About the Authors

Renee Korczak, PhD, RDN, an advanced practice registered dietitian nurtritionist and owner of Premier Nutrition, has an appointment in the Department of Food Science and Nutrition, University of Minnesota–Twin Cities (korcz005@umn.edu).

Joanne Slavin, PhD, is a professor in the Department of Food Science and Nutrition at the University of Minnesota, Twin Cities, and served as a member of the 2010 Dietary Guidelines Advisory Committee (jslavin@umn.edu).