Drinking too much coffee can cause insomnia, rapid heartbeat, memory loss, loss of appetite, etc. In severe cases, heart damage and edema may even occur.

The main component of coffee is caffeine. Drinking too much coffee will stimulate the peristalsis of the stomach and the secretion of gastric acid, causing gastrointestinal cramps. It can also lead to chronic gastritis. At high doses, caffeine can cause tachycardia, and arrhythmias such as premature contractions may occur in sensitive individuals. Long-term coffee consumption can increase blood cholesterol levels, but this is not due to caffeine, but to other components contained in coffee.

Drink coffee in moderation.