Caffeine and health

According to the previous saying, drinking coffee is harmful to health, at least it does more harm than good. So far, however, people all over the world have highly praised coffee: "Coffee is the best pick-me-up." The original meaning of the word coffee is "energetic". Westerners can't do without coffee. In 1700, there were 3000 cafes in London. At that time, the population of London was only 600000, that is, an average of 200 people had a coffee shop. The comment on coffee mainly revolves around caffeine: "Coffee is addictive, easy to cause myocardial infarction and cerebral hemorrhage, harmful to chromosomes, and can lead to obesity."

The warning against caffeine was first documented in 1911, the year the authorities sued Coca-Cola, saying the new drink could be harmful to health, but Coca-Cola won the case. But the matter is not over, and the real anti-coffee wave began in the 1970s. At that time, many researchers suggested that caffeine was associated with heart disease and bladder cancer. A toxicologist in California said he had been a consultant for the coffee industry for the 1/4 century and had seen 4, 000 or 5, 000 articles criticizing coffee and caffeine, in which coffee was described as a drink associated with almost every disease.

In fact, human consumption of caffeine has a history of 8000 years. It can be said that the recent research results are almost a vindication of coffee, they show that coffee and caffeine are healthy. How healthy is it? Some people say that if we don't get caffeine from coffee, we have to add caffeine to drinking water.

Twenty-four studies have reported that coffee drinkers are less than 25% likely to develop colorectal cancer. Other studies have shown that coffee drinkers are less likely to develop liver cancer and type B diabetes. Recently, some scientists have even pointed out that caffeine can delay the occurrence of Alzheimer's disease and alcohol-induced liver damage. In particular, the scientific community stressed that this series of studies are not sponsored by coffee growers or coffee producers, but are a by-product of a large health research project funded by the American Institutes of Health. Due to the diuretic effect of coffee, coffee can also reduce the chance of getting kidney stones. Coffee is also a mild antidepressant for some people, pulling people back from suicidal thoughts, but scientists believe it will take 10 to 20 years to figure out how it works.

Most people think of coffee as a machine that only produces caffeine. In fact, coffee contains about 2000 chemicals. Coffee has anti-cancer effects because it contains a group of antioxidants, which are also found in red wine, chocolate, tea and other fruits and vegetables. The caffeine content of common drinks is roughly as follows: filtered coffee 140mg per 200ml, espresso (Espresso) 100mg per 200ml, instant coffee 80mg per 200ml, black tea 80mg per 200ml, green tea 40mg per 200ml, dark chocolate 35mg per 30g, cola 32mg per 330ml, decaffeinated coffee 6mg per 200ml, caffeine tablets 20200mg.

Western adults consume an average of about 280 milligrams of caffeine a day. As Westerners who have long been used to drinking coffee, they advocate drinking no more than four cups of coffee a day. In other countries, it is more appropriate to limit it to 2 to 3 cups. Although the evaluation of coffee and caffeine has changed fundamentally, coffee is still not suitable for long-term drinking, and patients with high blood pressure, elderly women, pregnant women, children and stomach problems should be more cautious.