You probably heard that Starbucks is now offering a new bigger size of coffee that's got an even stranger name. I think they call it the "Trenta". Which I think is Italian for "Half Gallon". I love coffee, heck I wake up at one in the morning, I know coffee, I don't give blood, I slow drip it through a filter. You get the point. But when is it too much for the system? Well let's understand how coffee and the chemicals involved react with in our bodies first.