Have you ever wondered what is caffeine? Can you drink too much caffeine? Most people drink too much. In this case, to avoid drinking too much caffeine, young people should not consume more than 100 mg of caffeine per day. Know how much water and caffeine is in your coffee by just typing how many grams of coffee do you want to drink. Set a timer to see how many seconds it takes for your coffee to be ready. Enjoy and drink enough coffee to stay healthy.