Nearly 40 million Americans say they binge drink at least once a week. That's according to a startling new CDC report.
Binge drinking is defined as having more than four drinks in one sitting for women and more than five in one sitting for men.
Federal researchers analyzed data from phone surveys of roughly half a million adults.
They found binge drinking was most common among people ages 18 to 24.
That group also consumed the most drinks each time, about nine per occasion.
However, people ages 65 and older who reported binge drinking had the highest frequency, more than five times a month.
The habit was more common among men than women, and among Caucasian and Hispanic adults.
Health officials say excessive use of alcohol, including binge drinking, accounts for 80,000 deaths in the U.S. each year.