Coffee may keep you awake at night, or it may raise your blood pressure. However, Professor Martin, director of the coffee research institute of Vanderbilt University in the United States, recently said that coffee contains hundreds of healthy ingredients, which can resist liver injury, various cancers, asthma, heart disease and paralysis.

He pointed out that it is beneficial to drink 2-4 cups of coffee every day. People who don't drink coffee are more likely to suffer from these diseases than those who drink coffee. Studies in recent 20 years have confirmed that caffeine is an effective component in coffee, which can activate the central nervous system, and can be used to make long-term analgesic drugs, which can resist drowsiness, colds, asthma and edema. Its side effects are addiction, insomnia, nervousness and high blood pressure.

Studies have shown that coffee contains anti-dementia substances, which can reduce the impact of harmful substances on the body and help prevent some diseases. Scientists say that when oxygen in the human body is mixed with other chemicals, it will form harmful substances that blindly destroy cells and body tissues, which is the cause of heart disease, vascular disease, tumor, decline of immune mechanism and neurasthenia. The research results of the American Coffee Institute show that coffee contains four times as many anti-dementia substances as tea. Nutrition plays a major role in strengthening the body's disease prevention mechanism. The substances that can resist dementia include vitamin E, vitamin C, carotene in soybean, red wine, some seasonings, fruits, onions, olives and so on. Roasted coffee beans are more resistant to dementia, and this substance in decaffeinated coffee will not be weakened or destroyed.

At the same time, experts point out that drinking a cup of coffee in the morning can refresh you, and drinking coffee during the day can refresh you. So coffee can be a little stronger at this time. It is best to have a little coffee after dinner or in the evening. Coffee is recognized as a healthy drink, but drinking coffee should be controlled for a certain time. Coffee or tea should not be used with meals, but should be drunk after meals. When drinking coffee, whether it is hot or cold, you should drink some boiled water. First of all, it can remove the odor in the mouth to get a better taste; Second, because coffee has diuretic effect, drinking more white water can improve urination and protect renal function, and you don't have to worry about getting angry when drinking coffee.

Black coffee has always been called "the messenger of health", and its effects on health mainly include:

1. Refreshing caffeine stimulates the central nervous system, which can make the mind clearer, have abundant thinking ability, concentrate and improve work efficiency;

2. Caffeine can make muscles contract freely and improve motor function.

3. appetizing and digestion caffeine stimulates gastrointestinal secretion of gastric acid, which can promote intestinal peristalsis, help digestion, prevent gastroptosis and have a rapid laxative effect.

4. Liqiao dehumidification caffeine can promote renal function, discharge excess sodium ions in the body, increase urination and improve abdominal distension and edema.

5. The linoleic acid contained in the coffee for promoting blood circulation and removing blood stasis has the functions of hemolysis, preventing thrombosis, enhancing vasoconstriction, relieving migraine and reducing the probability of stroke.

6. Pingfei Dingchuan Caffeine can inhibit parasympathetic nerve and reduce asthma attacks.

7. Dry deodorized caffeine contains tannin, which has a strong adsorption capacity for taste. If your room has just been renovated, make a pot of coffee indoors, and the taste will be quickly removed.

8, drinking coffee can protect the liver and hangover.

9, coffee can lose weight The best time to drink coffee to lose weight is 30 minutes after lunch to 1 hour and before going to work, taste a cup of rich sugar-free black coffee, with walking, can promote fat burning.

10, black coffee can effectively improve hypotension.

1 1, black coffee has antioxidant effect, which helps to prevent cancer and resist aging.