Modern medical research shows that coffee beans contain nutrients such as sugar, protein, fat, nicotinic acid, potassium, crude fiber and water. In addition, coffee also contains caffeine, tannic acid, alkaloids and other ingredients beneficial to human health.
The health effect of coffee on human body
Coffee is the longest-used but most misunderstood beverage for human beings. Many latest research reports show that caffeine is not as harmful to human health as previously thought in many aspects. On the contrary, some ingredients in coffee have many health-care effects on human body, which are gradually discovered by scientists.
At present, it is known that the special ingredients of coffee have the following physiological reactions to the human body:
* Antioxidant effect: Coffee is rich in caffeine, caffeic acid, chlorogenic acid and other ingredients, which can effectively resist free radicals that threaten our health, and free radicals are the main causes of many diseases (such as myocardial disease, arteriosclerosis, stroke, emphysema and Parkinson's disease). Excessive free radicals will affect the metabolism of the body, destroy cells and then affect organs and tissues.
* Function of protecting the heart and blood vessels: Coffee contains high content of polyphenols, which is a powerful antioxidant, which can delay the oxidation time of low-density lipoprotein by up to three times, dissolve thrombus and prevent the formation of thrombus; Coffee can also enhance vasoconstriction and avoid headaches caused by vasodilation. In addition, a small amount of coffee can also enhance myocardial contractility, promote blood circulation, and achieve the role of preventing cardiovascular diseases.
* Refreshing: Caffeine contained in coffee will stimulate the central nervous system of the brain, prolong the waking time of the brain, make the thinking clear, sharp and more focused, and improve the efficiency of work and study.
* Anti-depression: A small amount of coffee can make people feel refreshed, happy and relieve depression.
* Weight control: Caffeine can increase the rate at which people burn calories. A study found that 100 mg of caffeine (about 1 cup of coffee) can accelerate the decomposition of fat, increase the metabolic rate of human body by 3% to 4%, increase the consumption of heat energy, and have the effect of losing weight.
* Promote digestion: Caffeine can stimulate sympathetic nerve and increase gastric juice secretion. If you drink it in moderation after meals, it will help digestion.
* Diuretic: Coffee has diuretic effect, which can increase the amount of urination, thus increasing the frequency of going to the toilet.
* Improve constipation: Coffee can stimulate gastrointestinal hormones or peristalsis hormones, resulting in laxative effect, which can be used as a rapid laxative.
* Reduce the risk of colorectal cancer: Coffee contains natural antioxidants.
* Analgesic effect: As a medicine, caffeine can enhance the effect of some analgesics.
* Enhance the agility of the body: Caffeine also helps to lower the threshold of exercise, increase the agility of the body and enable athletes to achieve better results.
* Reduce the risk of gallstones: A recent study by Harvard School of Public Health pointed out that people who drink 2-3 cups of coffee a day have an average 40% lower risk of gallstones than those who never drink. In addition, tannic acid contained in coffee has astringent, hemostatic and deodorizing effects.
Health hazards of coffee
At present, there is no direct evidence that caffeine can lead to osteoporosis, and some studies have found that caffeine can increase calcium excretion, but it is not a high-risk factor for osteoporosis. Insufficient calcium intake is the main reason, so it is recommended to pay attention to adequate calcium intake. At present, researchers do not have enough evidence to show the correlation between coffee and blood lipids, blood pressure, heart disease and cancer. Although drinking too much coffee may hinder the development of the fetus, whether it will lead to premature birth or low birth weight has not been confirmed. However, it is better to advise pregnant women to drink less coffee, because enough studies have pointed out that caffeine will
Reduce the probability of female pregnancy, increase the risk of miscarriage, and slow down fetal development.
Who should drink less coffee?
Drink less coffee when your body has the following conditions or diseases.
:: Developing children
* During pregnancy
* Women who are breastfeeding.
:: Older people
* Before fasting (or before meals)
* Diarrhea patients
* People with hyperacidity
* Patients with gastric ulcer and duodenal ulcer
* People with irritable bowel syndrome
* People who smoke
* After drinking alcohol
* People who are prone to insomnia
* People with mental illness
* People who take sedatives.
* Kidney disease patients whose potassium intake should be restricted.
Health knowledge of coffee
According to medical research, the best time to drink coffee every day is from 3 pm to 5 pm in spring and winter, and from 4 pm to 6 pm in summer and autumn, because this is the most tiring time for the human body.
In addition, in order to enjoy delicious coffee healthily, we must also pay attention to the following matters:
1. Drinking more than five cups of coffee every day (about 150cc per cup) is addictive and harmful to health.
Drinking coffee in the morning really helps to keep a clear head and full of energy, but you can't drink it until breakfast, otherwise it will easily hurt the gastrointestinal function. People with gastric and duodenal ulcers should especially avoid drinking coffee on an empty stomach.
Don't drink coffee after drinking, otherwise it will stimulate blood vessel dilation, accelerate blood circulation and increase the burden of cardiovascular system.
Drinking coffee for about ten to fifteen minutes will refresh you, so don't drink coffee before going to bed to avoid insomnia.
Don't drink too strong coffee, otherwise it will make people impatient and weaken their understanding.
6. You can't smoke immediately after drinking coffee, otherwise it will easily cause harm to your heart.
7. Take antibiotics and drugs for treating gastric ulcer, and don't drink coffee at the same time, so as not to irritate the stomach and cause pain and discomfort.
8. When drinking coffee, it is best to add some creamer to relieve the stimulation to the stomach, but both creamer and sugar have calories, so it is necessary to control the intake and avoid getting fat. Proper intake of coffee should be harmless to the human body, and all food is a gift from heaven. Therefore, having a leisurely cup of coffee next time can not only make you enjoy a leisurely and relaxed atmosphere, but also relieve stress, relax your body and mind and eliminate fatigue. This small cup of coffee is building a solid defense line for your health and carefully protecting you. Remember not to drink too much!
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