In the best-selling book 101 Reasons Why Coffee is Not a Crime, it is mentioned that the chlorogenic acid in coffee has antioxidant properties, and the lactones produced when properly roasted can regulate mood and even help reduce cravings for nicotine and alcohol. Nicotine greatly increases the risk of coronary heart disease and depression in men, and if coffee can help prevent depression and block cravings for nicotine and alcohol, then proper coffee consumption should be promoted for patients. Drinking four cups of coffee a day can help prevent cardiovascular disease and myocardial infarction. Experts point out, however, that for heart patients, drinking coffee is more bad than good. This is because caffeine excites the sympathetic nerves and makes the heart beat faster. As long as the heart patients, doctors do not advocate the heart beating too fast, because it will lead to increased oxygen consumption of the heart, heart hypoxia. In addition, drinking coffee in winter is more likely to induce heart ischemia.