For many years, researchers have been studying the health effects of coffee drinks. Many scientists say that there is no substantial evidence that drinking coffee or caffeinated drinks in moderation will pose a serious or slight threat to health. More than 80% of Americans drink at least one caffeinated drink every day.
In American adults, it is estimated that each person consumes about 200 milligrams of caffeine per day, which is equivalent to 5 ~ 8 ounces of coffee, or 4 cups of cola drinks, or 5 cups of tea. For healthy people, the biggest worry is addiction to caffeine. Addiction is characterized by headache, fatigue, depression and inattention after 12 ~ 24 hours. Drinking coffee in moderation (2 ~ 4 cups a day) has no obvious effect on health. However, some studies show that drinking a lot of coffee can lead to bone loss in women. There are also some studies that show that men with mild hypertension will have a significant increase in blood pressure after drinking 2 ~ 3 cups of coffee.
Coffee is a methyl xanthine compound with the chemical name 1, 3,7-trimethyl xanthine, which exists in more than 60% of plant products, including tea, cocoa beans and coffee beans. Caffeine is similar to amphetamine (a central stimulant), but its effect is milder than amphetamine, which can stimulate the sympathetic nervous system of human body, make people more alert and agile, and also reduce fatigue. The effect of caffeine on blood vessels leads to its medical application: it can dilate coronary artery and increase blood flow; It can constrict the head artery and help relieve migraine. A recent study at the University of California concluded that taking 400 milligrams of caffeine a day can help relieve the symptoms of hay fever.
Dr. James L. Mills, an expert on pregnancy complications at the National Institute of Child Health and Human Development in the United States, pointed out that drinking a lot of coffee will make drinkers overworked and force them to engage in unhealthy behaviors.
This is the latest information about the health effects of coffee. Heart disease A study in the 1980s showed that people who drink more than five cups of coffee a day will suffer from heart disease.
However, a recent study confirmed that women who drink more than five cups of coffee a day have no risk of heart disease, even if they have coronary artery obstruction or arrhythmia. Women who drink more than six cups of coffee don't seem to increase the risk of heart attack.
Some people proudly reject the stimulating effect of caffeine, but long for the taste and social status symbol of coffee. Decaffeinated coffee can fascinate these people. However, some studies have found that people who drink decaffeinated coffee drinks do not lower their serum cholesterol levels.
A study sponsored by the National Institutes of Health and led by Dr. H. Robert Suberg confirmed that decaffeinated coffee is more likely to increase the level of LDL cholesterol in damaged arteries. Dr. Suberg believes that in order to make up for the loss of taste during processing, Robusta, a stronger coffee bean, is usually used to prepare decaffeinated coffee, which may be the reason for the increase of LDL cholesterol level. Cancer 198 1 year, researchers at Harvard University reported that pancreatic cancer was related to coffee, which sounded the alarm for coffee lovers, but at least seven large-scale studies failed to confirm this relationship. Research on benign fibrocystic mastopathy and breast cancer has caused similar panic. Some people think that caffeine is related to fibrocystic mastopathy, but there is no well-designed study to confirm the clear relationship between caffeine and fibrocystic mastopathy.
References:
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Advantages and disadvantages of drinking coffee regularly
Because coffee contains caffeine, it has obvious exciting effect on human central nervous system, which can promote blood circulation, dilate blood vessels and promote blood circulation in the brain. Therefore, drinking coffee in moderation will undoubtedly have a certain effect on improving mental and physical strength. For example, drinking a cup of coffee every morning will make you feel refreshed and energetic. However, caffeine has certain toxicity, such as excessive intake, which will also cause obstacles to the physiological functions of human body such as nerve activity, blood circulation and digestive system. If you drink more than three cups of coffee at a time, you will feel nervous, anxious and short of breath. If you drink more than ten cups, it will cause poisoning, such as dizziness, tinnitus, elevated blood pressure, blurred vision, rapid arrhythmia, and even nervous disorder and muscle tremor. The dose of caffeine poisoning is generally 0.5 ~1g.
Coffee can also affect people's heart rate, pulse and blood pressure, playing a stimulant role, so that heart patients who drink coffee increase the chance of myocardial infarction. Coffee can also stimulate gastric mucosa and stomach wall, leading to gastric perforation in patients with gastric ulcer. Therefore, people suffering from heart disease, high blood pressure and gastric ulcer should generally not drink coffee.
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On the advantages and disadvantages of coffee promotion ability
Through research, it is found that coffee has a refreshing effect because it contains caffeine. Of course, it's not just coffee that contains coffee. Green tea and black tea also contain caffeine. So, what effect does this caffeine have on sex? Before answering this question, we should first explain what the function of refreshing the brain is.
For example, when people feel groggy, drinking a cup of coffee or black tea will immediately refresh their mood, because caffeine in its ingredients will stimulate sympathetic nerves. Simply put, the sympathetic nerve is in charge of all activities during the day. As long as you are stimulated, you can regain your energy and everything becomes more lively.
On the other hand, this matter is tantamount to suppressing parasympathetic nerves. Because sympathetic nerve and parasympathetic nerve belong to the exterior-interior relationship, when sympathetic nerve is active, parasympathetic nerve weaker than sympathetic nerve is inhibited. At night, the physiology of parasympathetic nerve, erection and other parts related to sex will have a negative impact on sex because of excessive coffee intake.
The autonomic function of sympathetic nerve and parasympathetic nerve is because many people don't know that regulating autonomic nerve is one of the keys to sexual ability. Instead of missing some widely circulated but useless methods to strengthen men, it is better to really understand the effective methods here.
Therefore, it is best not to drink caffeinated coffee and other drinks, especially before making love. So as not to inhibit parasympathetic nerves and reduce sexual desire.
Of course, it varies from person to person. People who are too tired to sleep and can't even have sex at night might as well have a cup of espresso at night. Its refreshing effect will last until the evening, so that you can have sex smoothly. Make your wife or girlfriend happy. It is important that everyone uses caffeine to refresh themselves in different ways.
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Coffee and milk are harmful to health.
Food is the most important thing for people. People have to eat when they are alive. But only a reasonable and scientific diet can promote health. On the other hand, improper diet will be harmful to health. Therefore, nutritionists warn consumers that coffee+milk = harmful to health.
Drinking coffee in moderation (no more than two cups a day) is good for the heart and brain. Milk rich in calcium is a good drink for strengthening bones. However, the long-term mixing of milk and coffee will cause liver damage, because this mixing will produce unstable and indigestible emulsion.
French people drink the most coffee and milk in the world, but there are no more people suffering from hepatitis among them than in other countries. It turns out that there is a trick: pour coffee into milk instead of milk into coffee, and it is best to use skim milk. This will prevent milk from going bad in your stomach.
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Coffee new concept
"Having a cup of coffee" has become the most popular and common way of communication. Most westerners regard it as a part of daily life;
What is the charm of coffee that many people miss? Besides tasting a good cup of coffee, it also adds a lot of fun to life. But you know what? While enjoying a cup of delicious coffee, it will help your health unexpectedly! The next time you taste coffee, you may wish to know the following health knowledge about coffee.
When did coffee first originate?
There are different stories about the discovery of coffee. One of them is that there was a shepherd in Ethiopia in the sixth century. One day, he found his sleepy sheep jumping around there. He felt very strange. After careful observation, he realized that the sheep was chewing a bright red fruit (small coffee bean), so he tried this fruit. He forgot his troubles and lost his heavy sadness.
Later, he took the fruit to the brothers in the monastery to eat. Everyone felt refreshed after eating it, and then they gradually drank it as food. So coffee spread from Arabia to Egypt and Turkey, and then to Europe through Italy. By17th century, coffee has become the most important non-alcoholic beverage in Europe and America.
Nutritional Value of Coffee 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 care function of coffee to human body Coffee is the beverage that human beings have used for the longest time, but it is misunderstood the most. 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 physiological response of special components of coffee to human body is as follows: 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, Parkinson's disease). Excessive free radicals will affect the metabolism of the body, destroy cells and then affect organs and tissues.
Protect the function of heart and blood vessels.
Coffee contains high content of polyphenols, which is a powerful antioxidant and can delay the oxidation time of low-density lipoprotein by as much as three times, dissolve thrombus and prevent thrombosis. 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.
Caffeine contained in "refreshing" coffee will stimulate the central nervous system of the brain, prolong the waking time of the brain, make the thinking clear, sharp and 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 the body consumes calories. According to a study, 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 heat energy consumption, and have the effect of losing weight.
Caffeine can stimulate sympathetic nerve and increase gastric juice secretion. If you drink it in moderation after meals, it will help digestion.
be diuretic
Coffee has diuretic effect, which can increase the amount of urination, thus increasing the number of trips to the toilet.
Improve constipation
Coffee can stimulate gastrointestinal hormones or peristalsis hormones to produce laxative effect, which can be used as a rapid laxative.
Reduce the risk of colorectal cancer Coffee contains natural antioxidants.
As a medicine, caffeine can enhance the effect of some painkillers. (Yahui can relieve migraine)
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Caffeine also helps? B style='color: black; Background color: # A0FFFF'> When exercising, it makes the sports threshold low, increases the agility of the body, and enables athletes to create better results.
Reduce the chance of gallstones.
According to the latest research of Harvard School of Public Health, people who drink 2-3 cups of coffee every 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.
The health hazard of coffee is 1. 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.
2. At present, there is not enough evidence to show the correlation between coffee and blood lipid, blood pressure, heart disease and cancer.
Drinking too much coffee may hinder the development of the fetus, but it has not been confirmed whether it will lead to premature birth or low birth weight.
However, it is better to advise pregnant women to drink less coffee, because enough studies have pointed out that caffeine will reduce the chances of pregnancy, increase the risk of miscarriage and slow down the development of the fetus.
Who should drink less coffee? Drink less coffee when your body has the following conditions or diseases.
Developing children
Pregnancy time
A woman who is breastfeeding.
the aged
Before fasting (or before meals)
Diarrhea patient
People with hyperacidity
Suffering from gastric ulcer and duodenal ulcer
People with irritable bowel syndrome
Smokers
People who drink alcohol.
Patients with mental illness
People who take sedatives.
Kidney disease patients who should limit potassium intake
Medical research on coffee health knowledge points out that the best time to drink coffee every day is:
Spring and winter are from 3 pm to 5 pm, and summer and autumn are from 4 pm to 6 pm, because this is the most exhausting 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 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. (Heart rate will also increase)
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 irritation to the stomach, but both creamer and sugar have calories, so we must control the amount to 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!
The essence of coffee debate and its relationship with tea: "Is coffee harmful to human health?" It has caused unprecedented controversy in the United States. Its center lies in the evaluation of caffeine. One view is that caffeine is beneficial to human physiological function and drug synergy; Another view is that caffeine is a suspicious mutagen, which can mutate cells, leading to cancer, physical defects and heart disease. But Japanese researchers have announced that caffeine has an anti-induction effect.
After a lot of controversy and research, it has been proved that the quality of caffeine to the human body is largely determined by the intake. The controversy over caffeine inevitably makes many people more cautious about coffee. Since the end of 1970s, the coffee consumption in the United States has dropped sharply, and by 1990, the coffee consumption in the United States was only1957.65%.