[ipnon]

That's about 1000mg of caffeine a day. A gram a day is diminishing returns for the average coffee drinker, and may signal addiction. Addiction is dangerous in itself, so we might explain the outrageous results of this study in that way. A lifetime on the edge is a recipe for disaster!

[daneel_w]

Depending on how and what you brew, a cup of coffee can contain 35, 100 or 150 mg of caffeine. People also invariably consider a mug of coffee the same as a cup of coffee.

A common reference in $my_country is that a cup (15 cl) of coffee usually contains circa 70 mg of caffeine.