1. Causes insomnia and palpitation: Caffeine in coffee has an exciting effect, which will cause people's mental excitement, leading to insomnia and palpitation. Especially people with anxiety tendency should try to avoid drinking coffee.
2. Cause arrhythmia: Excessive drinking of coffee may cause arrhythmia, but the risk is relatively small.
3. Raise cholesterol: Drinking coffee for a long time may lead to an increase in cholesterol concentration in human blood.
Drinking coffee also has certain benefits, such as eliminating fatigue, improving the neurological function of the brain and promoting thinking ability. In short, don't overdo it, just take it properly.