I’m having problems getting to sleep at night. I’m worried that my dinner coffee may be keeping me awake. How much coffee is too much at night?
Caffeine only takes 15 to 20 minutes to get into your blood and the caffeine effect lasts up to 10 hours. If you have problems falling asleep at night, avoid all caffeine-containing foods for 10 hours before bedtime. The effect of caffeine in foods lasts this long too. Foods that contain caffeine in addition to coffee and tea are cola containing beverages (Mountain Dew; Dr. Pepper; Mr. Pibb; Mellow Yellow; Big Red; Aspen; Kick) including energy drinks and beverages or foods containing chocolate or cocoa.