The beneficial properties of chocolate are well known, for example, it is an excellent antidepressant, it perfectly raises vitality, and also has the ability to relieve fatigue and increase performance. However, chocolate also has a less pleasant side effect - sleep disturbance. The fact is that chocolate contains a certain amount of stimulant substances. One of them - theobromine (theobromine) - helps accelerate heart rate and causes insomnia, it is found in small amounts in dark chocolate. Therefore, doctors do not recommend eating chocolate, as well as drinking coffee, strong tea and drinks containing caffeine, several hours before bedtime.