HOUSTON, May 20 (UPI) -- Men who drink two to three cups of coffee per day, or consume an equivalent amount of caffeine, are about 40 percent less likely to experience erectile dysfunction.
Researchers associated caffeine with ED based on a survey of 3,724 men older than 20. The survey included questions about daily caffeine consumption and whether or not they'd experienced erectile dysfunction. The question in the survey applied caffeine intake not only to coffee, but also to tea, soda and sports drinks.