8 Popular Caffeine Sources And How They Differ

Here's the inside track on the most common sources of caffeine used in dietary supplements. Do you know what's giving you your buzz today?It's not much of an overstatement to say that caffeine is as ubiquitous in American society as drinking liquids, period. A recent survey of 24,808 adults reported that 89 percent of all adults in the United States consume caffeine regularly, and that 98 percent of our psychoactive fix is being delivered as a beverage. Men consume an average of about 240 millig