Sep 11 2025 New federal data reveal that U.S. adults are eating less fast food than a decade ago, as shifting habits among younger adults drive down its share of daily calories. Report: Fast Food Intake Among Adults in the United States, August 2021–August 2023 . Image Credit: nazarovsergey / Shutterstock A recent report from the National Center for Health Statistics used NHANES data to estimate the share of daily calories from fast food among American adults. One-third of adults ate fast food