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.

Can Caffeine Decrease Testosterone?

Published Aug,25 2011 | By Bonnie Singleton

Testosterone is a vital sex hormone that boosts muscle formation, facial hair and genital development. In an effort to avoid substances that may decrease testosterone, some athletes and bodybuilders shun caffeine, but it appears that caffeine may actually increase testosterone.

Bonnie Singleton has been writing professionally since 1996. She has written for various newspapers and magazines including "The Washington Times" and "Woman's World." She also wrote for the BBC-TV news magazine "From Washington" and worked for Discovery Channel online for more than a decade. Singleton holds a master's degree in musicology from Florida State University and is a member of the American Independent Writers.