Drinking tea is good. First, drinking tea can lose weight. Second, drinking tea can prevent tooth decay. Third, tea can prevent cardiovascular diseases. Fourth, tea is a good medicine for intestinal diseases. Among them, green tea can prevent radiation from computers, mobile phones and televisions. People who drink more than five cups of coffee a day are twice as likely to have heart disease as normal people. Because caffeine will increase cholesterol and triglycerides in the blood, leading to arrhythmia, which will lead to heart disease in the long run. Caffeine can lead to calcium loss and lead to osteoporosis. Women and children who drink more than three cups of coffee every day should pay more attention! Not only that, caffeine can also stimulate intestinal contraction and cause diarrhea, so people who often drink coffee on an empty stomach can easily lead to hyperacidity or gastric ulcer. Drinking too much coffee may induce pancreatic cancer, breast cancer and ovarian cancer. If girls drink a lot of coffee before menstruation, they may have premenstrual syndrome such as emotional instability, tension, irritability, inattention, headache or breast pain due to the stimulation of caffeine. The doctor said that the best time to drink coffee in summer is from 4 pm to 6 pm, and in spring and winter it is from 3 pm to 5 pm. Tell everyone some precautions for drinking coffee! 1. Don't drink coffee before going to bed to avoid insomnia. Don't drink more than five cups of coffee every day. Don't smoke and drink immediately after drinking, otherwise it will speed up blood circulation and increase the burden on blood vessels. Don't drink coffee on an empty stomach, or you will hurt your stomach. People with duodenal ulcer should avoid drinking coffee on an empty stomach. Pregnant women had better not drink coffee, because caffeine will be absorbed by the baby through the placenta, which is harmful to the baby's brain and heart! 6. Don't drink too strong coffee, otherwise it will make people impatient and have poor understanding. 7. It is best to add cream to drink coffee to relieve the irritation to the stomach. But we should control the intake of sugar to avoid obesity. Although mellow coffee is attractive, it has many disadvantages to our health! But if you really can't resist the magic of coffee, the most important thing is not to overdo it.