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.

Disadvantages: 1 Adding caffeine when you are nervous helps to improve alertness, sensitivity, memory and attention. But if you drink more coffee than you are used to, you will have the same dose of stimulants, which will cause tension. For people with anxiety tendency, caffeine can aggravate the symptoms of sweating, palpitation and tinnitus. 2. Caffeine, which aggravates hypertension, is often combined with other simple painkillers because of its analgesic effect. However, if you take a lot of caffeine for a long time, if you already have high blood pressure, using a lot of caffeine will only make your situation worse. Because caffeine alone can raise blood pressure, if combined with emotional tension, it will have a dangerous multiplier effect. Therefore, people at risk of hypertension should especially avoid drinking caffeinated drinks when working pressure is high. Some people who drink coffee all the year round think they are immune to the effects of caffeine, but this is not the case. A study shows that after drinking a cup of coffee, the blood pressure can rise for as long as 12 hours. 3. Caffeine inducing osteoporosis has a good diuretic effect. If you drink a lot of coffee for a long time, it will easily lead to bone loss and adversely affect the preservation of bone mass. For women, it may increase the threat of osteoporosis. However, the premise is that people who usually have insufficient calcium intake in food, or people who don't exercise often, and postmenopausal women, due to insufficient estrogen, calcium loss, coupled with a large amount of caffeine, may pose a threat to bones. If you can enjoy it in a reasonable amount, you can still do it without choking.