Amount of caffeine in coffee varies greatly

According to a study by a Griffith University dietitian Ben Desbrow, there's a tremendous variance in the caffeine content in consistently-sized shots of espresso from different coffee shops. From ABC News Online:

"The range was 25 milligrams to 214 milligrams, which was far greater than we'd anticipated.

"What our data led us to believe was that you really didn't know what you were going to be exposed to in terms of the caffeine content."

He says that means some single coffees contain more than half the daily amount of caffeine that is considered safe to drink without any side-effects.

Link (via Fark)

UPDATE: Dru Sefton points us to an article she wrote about a similar study done in the US in 2003. Link