It's important to note here what scientists mean when they say a cup of coffee. They mean six ounces, the size of a coffee cup your parents used.
Most of us drink coffee in mugs that hold 8-10 ounces. A single grande from Starbucks contains about 16 ounces, or almost three cups as scientists measure them.
Most of the positive impacts of coffee, then, are available with just a single morning coffee run. Some of these impacts diminish as you drink more coffee. Drink seven cups and you may even start hallucinating, and not in a good way. A Swedish study shows women who drink a lot of coffee having smaller breasts, and men who drink a lot larger ones.
I should say I have no stake in this. I seldom drink more than two cups per day. I prefer green tea.
What do you think this coffee research obsession means?