The relationship between drinking coffee and health
In the past, coffee was once considered as a drink that "increased the risk of cancer". When coffee was first studied in the 1960s, people once thought that this dark and burnt thing was likely to increase the risk of cancer, and the practice of roasting coffee beans was once questioned.
With the deepening of coffee research in the past 50 years, people's views on coffee are gradually changing. Now people generally recognize the health care function of coffee, but there are still many completely different views on coffee, which makes ordinary consumers at a loss. Are these health claims about coffee true or false? The article "Nihon Keizai Shimbun" reveals the health secrets of coffee for you.
Chlorogenic acid and caffeine in coffee attract attention.
Researchers all over the world have conducted a large-scale epidemiological investigation on coffee. Duan Liyang Duan Liyang, a professor at the Graduate School of Medicine of Hokkaido University, said that in a follow-up survey of 1 10000 people's liver health, it was found that people who drank more than 1 cup of coffee every day had a lower risk of dying of liver cancer than those who did not drink coffee. In addition, according to a survey of 54,000 people conducted by the National Cancer Research Center of Japan, people who drink 1-2 cups of coffee every day have a 40% lower risk of uterine cancer than those who drink coffee less than twice a week.
When exploring the effects of coffee ingredients on human health, chlorogenic acid and caffeine contained in coffee are considered as the key components affecting health. Caffeine has protective effect on cells. Chlorogenic acid is a polyphenol, which can inhibit the canceration of normal cells. At the same time, there are 69 chlorogenic acids in coffee.
Coffee also has a preventive effect on type 2 diabetes induced by improper diet and insufficient exercise, which has been determined by research groups around the world led by the Netherlands. Although the specific prevention mechanism is still unclear, scientists generally believe that this is the result of chlorogenic acid inhibiting the rise of blood sugar and caffeine promoting basal metabolism.
At present, the preventive effect of coffee on diabetes has been basically scientifically determined, but in many other disease fields, the health care effect of coffee on human body is still being explored. At present, the effects of coffee on Alzheimer's disease and arteriosclerosis are still under study.
Coffee and health, the truth you should know.
There are many sayings about coffee, not only for preventing diseases, but also for slimming and beauty. Are these statements really reliable and scientific? If you want to improve the health care effect of coffee, should you also pay attention to skills when drinking it?
Statement 1: Drinking coffee and exercising help to lose weight (○)
In the experiment, Masanobu Suzuki of Chi Hui Medical University in Tokyo found that people who jog for 30 minutes after drinking coffee consume more energy than those who jog for 30 minutes after drinking boiled water. He believes that caffeine in coffee can stimulate sympathetic nerve, promote the release of free fatty acids in blood, and then consume more energy. In aerobic exercise, fat is usually the main energy source, and caffeine can promote the burning efficiency of fat. In addition, in mouse experiments, it is also found that caffeine combined with exercise can reduce the body's defensive fat by 60%.
Statement 2: Dark coffee beans are healthier than light coffee beans (△).
Dark coffee beans look darker and more effective than light coffee beans, but in fact, the caffeine content has nothing to do with the baking degree of coffee beans, and there is almost no difference between dark and light coffee beans.
From the content of chlorogenic acid, the content of chlorogenic acid in raw beans is usually the highest, which decreases with the increase of baking time, but the intake of chlorogenic acid has nothing to do with the proportion of disease prevention. Only the experimental results show that chlorogenic acid can inhibit the increase of blood sugar no matter how much it is ingested. Therefore, no matter how roasted coffee beans are, there is no difference in health effects between different coffee beans.
Statement 3: Coffee can prevent stroke (○)
According to a survey conducted by the National Cancer Research Center of Japan and JACC Society, people who drink more than 1 cup of coffee every day have a lower risk of death from stroke than those who don't drink coffee. In addition, in the mouse experiment of Shinzaya Goto, a professor at Tokai University School of Medicine in Japan, it was found that coffee had an effect on the formation of thrombosis, the main cause of stroke. The results showed that after the three groups of mice were fed with "water", "coffee" and "caffeine solvent" respectively, the mice drinking coffee were more difficult to form thrombus clots than those drinking caffeine solvent. Although it is not clear whether this is the effect of caffeine, the effect of coffee on preventing stroke has been confirmed by experiments.
Statement 4: Drinking more coffee can produce prevent wrinkles (△).
After outdoor activities, the skin will form wrinkles under the influence of ultraviolet rays, but the factor affecting the wrinkle formation process is reactive oxygen species. Reactive oxygen species (ROS) will increase greatly under the action of ultraviolet rays, which will damage cells and promote the formation of melanin, which is also the reason why wrinkles are easy to occur after sunbathing.
The substance that can resist active oxygen is naturally an antioxidant. Antioxidants have attracted much attention in beauty and anti-aging in recent years, and chlorogenic acid contained in coffee is just an antioxidant. Studies have published that people who drink coffee have fewer wrinkles than those who don't drink coffee. However, because the research on human body has not yet reached a clear conclusion, there are still many doubts, so this statement needs further research and analysis.
Statement 5: It is better to drink coffee after meals (×)
After caffeine reaches the blood, the effect of stimulating sympathetic nerve generally begins to play a role half an hour after drinking. If you want to promote fat burning, you need to drink coffee at least half an hour before the start of exercise. Drinking coffee in the morning can also improve the attention and efficiency of work and study.
But from the time of drinking coffee, drinking coffee while eating is the correct way to prevent diabetes, because the intake of carbohydrates and chlorogenic acid together can best inhibit the increase of blood sugar. In other words, when drinking coffee is most beneficial to health depends on what kind of health effect you want coffee to have, and you can't generalize it.
In a word, coffee has many expected health effects, but in any case, coffee is just a kind of food, which can never achieve the therapeutic effect of drugs, so we should not expect too much from coffee. At the same time, the content of caffeine in coffee is about three times that of tea. Caffeine has a good refreshing, heat-clearing and analgesic effect, and can also stimulate a lot of gastric acid secretion. Excessive coffee intake will also have certain side effects on health. It is better to drink 1-2 cups a day, but if you drink too much, there will be no reward!
2. How to choose high-quality coffee
1. Fresh taste, floral and fruity (yellow landmark)
This kind of coffee with taste and flavor has a slight sour feeling, which is suitable for people who like not to bear the taste in their mouths. The representative places of origin are:
* Ethiopia: The unique fragrance and fresh taste of peaches and blueberries or red wine are most widely known-Yega Sheffield.
* Luanda: Cherry-like aroma and clear overall taste.
* Kenya: Kenyan coffee has multiple levels of caffeic acid and a strong sense of balance, and it has a sweet and sour feeling similar to citrus and red wine.
Round taste and rich layers (orange landmark)
This kind of coffee with rich taste and changeable taste is very suitable for people who like _ miscellaneous taste and aroma. The representative places of origin are:
Yemen: The unique aroma of fruits and spices combined with the mixed aroma of red wine, with the sweet aftertaste of cocoa, is worth savoring _-Matali.
* Hawaii: The sweet smell of fine grass or trees, coupled with the sweet and sour feeling of citrus, is characterized by more fragrance and less bitterness-Kona.
* Panama: A variety of fruits are rich and fragrant, with moderate taste and delicate fragrance _-geisha.
* Guatemala: The most recognizable thing is the fresh fragrance of flowers, coupled with the sweet and sour taste of cherries, and finally presents a complete sense of balance with a strong taste-Antigua Flower God.
3. Rich taste and aroma (red landmark)
This rich and long-lasting coffee is most suitable for people who like a solid and rich taste. Representative places of origin are:
* Colombia: Rich aroma of fruits and nuts, sweet and thick taste.
* Costa Rica: Full acidity and strong taste.
* Brazil: It has a unique nutmeg aroma and a strong nutmeg sense, with a slightly sweet aftertaste.
* El Salvador: Stable acidity and chocolate-like taste.
* Indonesia: Mandolin is as rich and fragrant as cream, and it is still loved by many people because of its delicate balance of herbs, spices, herbs and fruits.