Now more and more people like to drink coffee, especially office workers with high work pressure and intensity. Many like to refresh themselves by drinking coffee. But coffee is not only refreshing. The editor of this article will tell you what is black coffee and what is white coffee? Let's learn about the efficacy of black coffee.
Black coffee is coffee without any modification. Black coffee brings the original feeling of tasting coffee. The coffee made from a small home coffee machine can visually see the foam on the coffee. If it is ready to boil, the foam should be a uniform yellowish brown.
If the ingredients of coffee beans are mostly Arabica, the foam is fine, dark brown and slightly reddish. If it's mostly Lo Busta, the foam is loose and dark brown with gray stripes. A cup of mellow and delicious coffee, for black coffee fans, in addition to the mellow and mellow taste, the most attractive thing is a slightly mysterious and attractive aroma that comes out of the coffee during brewing. Therefore, the so-called tasting a cup of coffee should start from the moment when making coffee.
What is white coffee?
White coffee is coffee with milk (pure) or sugar, or both.
Efficacy of black coffee:
1. Refreshing: black coffee contains a lot of caffeine. Caffeine has a strong bitter taste and can stimulate the nerves, heart and smoking system. Therefore, drinking an appropriate amount of black coffee can refresh the mind and slow down the fatigue of the brain and muscles. Because caffeine has a strong diuretic effect, it can promote the elimination of excess sodium ions in the kidney and blood, and is also beneficial to the cardiovascular system.
2. Happy mood: many young people now regard black coffee as a fashionable leisure drink. Drinking a cup of fragrant black coffee after busy work is not only a means to eliminate fatigue, but also a spiritual enjoyment, which can alleviate the physical and mental fatigue of the day and regulate mood and emotion. Experiments show that the average person absorbs 300 mg (about 3 cups of brewed coffee) of caffeine a day, which will have a good impact on a person's alertness and mood.
3. Appetizer and food aid: caffeine in black coffee will stimulate sympathetic nerve, stimulate gastrointestinal secretion of gastric acid, promote digestion, prevent gastric distention and gastroptosis, and promote gastrointestinal hormones and peristaltic hormones to facilitate rapid defecation.
4. Diuresis and sobering up: caffeine in black coffee can not only diuresis, but also promote the conversion of ethanol to acetaldehyde. Therefore, drinking coffee after drinking can promote the conversion of ethanol into acetaldehyde in the blood, which can sober up after being excluded by the kidney.
5. Promoting blood circulation and removing blood stasis: linoleic acid contained in black coffee has the effects of hemolysis, preventing thrombosis, enhancing vasoconstriction, alleviating migraine and reducing the probability of stroke.
6. Prevention of gallstones: it is also caffeine. Caffeine has a certain stimulating effect on many organs and tissues in the body. For example, it can stimulate the contraction of the gallbladder and reduce the content of cholesterol in bile, which has a great preventive effect on the formation of gallstones. Research at Hafei University in the United States shows that people who drink 2-3 cups of coffee a day will reduce the risk of gallstones by 40%.
7. Prevention and treatment of cardiovascular diseases: hypotension patients can make themselves better by drinking a cup of black coffee every day. In the process of making coffee at high temperature, it will also produce an antioxidant compound, which helps to fight cancer, anti-aging and even prevent cardiovascular disease. Coffee can increase high-density cholesterol, accelerate the metabolism of bad cholesterol, reduce coronary atherosclerosis and reduce the risk of moderate wind.