The beverage report

21 Feb 2012

This week’s new smartphone app is Caffeine Zone. Developed at Penn State University, it warns you when your intake is either too high, or is going to keep you awake. 

“Many people don’t understand how caffeine levels in their bloodstream go up and how they go down,” said Frank Ritter, professor of information sciences, technology, and hot beverages at Penn State. So, if you have between 200 and 400 milligrams of caffeine in your bloodstream, you are in an optimal mental alertness zone. For sleep, you need less than 100 milligrams. 

By saying what coffee or tea you have been drinking and how fast you drank it, the app plots a graph to tell you when you’re going to be below the sleep line. It’s also useful, as the developers probably realised, to find out how much more caffeine you need to consume to stay awake long enough to finish coding your app.

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