This amount of caffeine equates to about four cups of coffee or two 5-Hour Energy shots. Too much caffeine can lead to an upset stomach, anxiety, headache, insomnia, and more. If grabbing a coffee ...

But is that too much? First the good news. It's almost impossible to overdose on coffee. There is a lethal dose of caffeine but it's somewhere around 10 grams and the average cup of Joe has around ...