Caffeine Effects: Withdrawal, Sleep & Health Impact

Caffeine impacts everything from sleep quality to concentration and heart rate. Learn how long withdrawal takes, the diuretic effects on the body, and the potential risks of taking caffeine tablets with medication or alcohol.

Natural Alternatives to Caffeine

Published Dec,09 2018 | By Sara Ipatenco

Many people rely on caffeine, a substance that's absorbed quickly, for energy. Some people, however, are sensitive to caffeine or don't want to include it in their diet.

Cold cola and lemonade in cans on ice cubes

Which Soft Drinks Do Not Contain Caffeine?

Published Jul,08 2011 | By Sara Ipatenco

Caffeine is a stimulant, which means it can help you wake up in the morning or give you a burst of energy in the afternoon. For most people, a moderate amount of caffeine, which is equal to about 250 milligrams -- or around 2 cups -- a day, is perfectly safe, according to the University of Maryland Medical Center.