Coffee lovers should be aware that drinking three cups or more a day can lead to caffeine addiction. The recommended maximum daily caffeine intake is 400 mg for adults, 300 mg for pregnant women, and 2.5 mg per 1 kg of body weight for adolescents.
A 300 ml can of coffee contains 70 to 150 mg of caffeine. Three cans a day would exceed the recommended daily maximum. A cup of Dutch coffee sold in cafes contains over 200 mg of caffeine, up to four times more than an Americano.
Caffeine is a central nervous system stimulant that can temporarily alleviate sleepiness and boost concentration.