It should be noted that most of these side effects are directly proportional to the intake dose of caffeine, and the daily intake of most people simply cannot reach the dose that produces these side effects (a cup of 355ml freshly brewed coffee in a coffee shop has a caffeine content of 235mg；; Instant coffee, which more people often drink, contains only 63mg of caffeine in 237ml. At the same time, our bodies still have some ideas about coffee? Tolerance? That is, people who drink coffee often have a slight or no response, while those who drink coffee occasionally have a greater response. Besides, some people are not born to drink coffee. They lack enzymes that metabolize caffeine. Low-dose caffeine intake will cause more serious side effects, and these friends will also have more obvious discomfort when drinking tea.
Compared with traditional coffee, some? New product? It contains more caffeine. For example, some functional drinks contain 80mg of caffeine in 250ml; There are also so-called small bottles of high-concentration functional drinks. 60ml contains 200mg of caffeine. Many young friends like milk tea, and the caffeine content of individual varieties is more than four times that of ordinary coffee. In life, we should be careful of those artificially added caffeine. In fact, drinks like coffee or tea water are safer as they are closer to natural ingredients.
If you take caffeine from a natural diet, it may be good for your health. According to a review article published in the famous medical journal NEJM, if you are used to drinking 1-2 cups of coffee every day, you will have the following benefits for your health:
1, nervous system: improve thinking sensitivity and mental alertness, reduce the occurrence of depression and Parkinson's disease, and improve the efficacy of painkillers;
2. Cardiovascular system: Although it will increase heart rate and blood pressure in the short term, long-term drinking will have a certain protective effect on the cardiovascular system;
3. Respiratory system: Drinking coffee for a long time can slightly improve people's lung function;
4. Digestive system: it can slightly reduce the risk of liver fibrosis and cirrhosis;
5, urinary system: it has a certain diuretic effect, which helps to prevent urinary tract infections and stones.
Nevertheless, drinking coffee for a long time will also bring some negative effects, such as caffeine will interfere with cholesterol metabolism, and patients with hyperlipidemia should drink less coffee; Caffeine can also reduce the insulin sensitivity of muscles in a short time, and diabetic patients had better quit the habit of drinking coffee; Caffeine can also slow down the growth of the fetus, and pregnant women should not drink coffee. As we all know, for friends with poor sleep quality, drinking coffee will aggravate insomnia and anxiety symptoms, and these people can't drink coffee often. At the end of this review article, it is mentioned that drinking coffee is related to the decrease of all-cause mortality, which is determined by the overall influence of coffee on the body. After excluding those situations that are not suitable for drinking coffee, drinking coffee is generally a healthy lifestyle.