Caffeine Content in your favourite drinks

Source: Caffeine Shockers: Products Surprisingly High in Caffeine

What's the caffeine content in your favorite energy drink, tea, or soda?

By Elaine Magee, MPH, RD
WebMD Expert Column 

For full article see http://www.webmd.com/diet/features/caffeine-shockers-products-surprisingly-high-in-caffeine 

A brief extract  from the above article is included for your interest.

Everyone knows you can find plenty of caffeine in regular coffee (80-150 milligrams in a 6-ounce cup of brewed coffee). But you might be surprised to find as much (or more) caffeine in energy drinks, sodas -- even gum and ice cream.

Coffee-flavored frozen yogurt and ice cream is also suspect, with anywhere from 45 to 85 milligrams of caffeine per cup, depending on the brand. Even some medications have caffeine: 56-120 milligrams for a standard dose of over-the-counter pain relievers, and up to 200 milligrams in weight control aids like Dexatrim.

"The caffeine content of energy drinks varies over a tenfold range, with some containing the equivalent of 14 cans of Coca-Cola, yet the caffeine amounts are often unlabeled and few include warnings about the potential health risks of caffeine intoxication," says Roland Griffiths, PhD, a professor of behavioral biology at Johns Hopkins University.

According to the APA's Diagnostic and Statistical Manual of Mental Disorders, some people can experience caffeine intoxication symptoms -- including restlessness, nervousness, excitement, insomnia, flushed face, and gastrointestinal complaints -- after ingesting as little as 100 milligrams of caffeine per day. At levels of 1,000 milligrams of caffeine per day, symptoms may include muscle twitching, rapid heartbeats, abnormal electrical activity in the heart, and psychomotor agitation.