How many cups of coffee is enough for a day? Also is 3 cups a day too much or average?

2 max. It is recommended for an adolescent to limit caffeine intake to 100 mg per day. Depending on the type of coffee consumed, either dark or mixed with sugar and creamer, 3 cups may be too much. To not stunt growth, best to limit coffee intake. Coffee is a diuretic that can also lead to bone loss.