How much is too much? http://www.mayoclinic.com/health/caffeine/NU00600

Is caffeine bad or good for you? This article clarifies some myths about caffeine and explains how it's not all good nor all bad! http://www.quickanddirtytips.com/health-fitness/prevention/caffeine-bad-you?page=all

Caffeine withdrawal is now a mental disorder Many of us have learned the hard way about having a cup too many-like the one morning after only 3 hours of sleep where I had EIGHT cups of coffee and thought my heart was going to fall out. The newest version of the DSM lists caffeine intoxication and withdrawal as disorders. Definitely the extreme end of caffeine intake...but this might serve as a warning. Or scare. http://newsfeed.time.com/2013/05/31/caffeine-withdrawal-is-now-a-mental-disorder/

Caffeine's reducing affect on your emotional intelligence Though studies show that caffeine actually cognitive task performance (memory, concentration, etc.) in the short-term...but it could be negatively affecting your emotional intelligence (EI). This article explains research from Johns Hopkins Medical School revealing the way caffeine may affect your EI. http://coffeeisbest.com/2013/03/19/caffeines-reversal-affect-on-your-emotional-intelligence/

Why Coffee is Good For You I want to emphasize that I am not necessarily saying you should stop drinking coffee- your intake just needs to be in moderation. This page provides the GOOD of drinking coffee. In moderation, of course. http://authoritynutrition.com/why-is-coffee-good-for-you/