benefits and effects of coffee

Coffee has become a symbol of pettiness and taste since it was introduced to the East from the West. Like Chinese tea, coffee is also one of the most popular drinks in the world, what are the benefits and disadvantages of drinking coffee to the body? Let's follow me to learn more about it.

Prevent gallstones

Coffee, not only is a refreshing drink, but also can prevent gallstones. Harvard researchers found that drinking two to three cups of coffee a day, the chances of getting gallstones than people who do not drink coffee is about 40% lower. And people who drink more than 4 cups of coffee a day, the chances of getting gallstones will be reduced to 45%. However, coffee that does not contain caffeine does not have this effect. Caffeine can stimulate the gallbladder to contract and reduce the cholesterol in the bile that tends to form gallstones. However, tea, cola and other beverages that also contain caffeine cannot achieve this effect because the caffeine content is lower than that of coffee.

Radiation protection

At present, radiation generated by radiation has become a major enemy of people's health. Especially the radiation from household appliances, such as computers, TVs, microwave jealousy, etc. A recent study found that coffee can protect rats from radiation, and this finding may also apply to humans. Researchers at the Bhabha Atomic Research Center in India found that 70% of the rats injected with caffeine survived after 25 days of receiving high doses of radiation that are generally lethal, while all the rats that did not receive the injection died. Kachapili George, who led the study, said the findings may also apply to humans. He said, "The study does show that coffee may help prevent radiation damage."

Cardiovascular protection

The polyphenols contained in coffee not only have antioxidant effects, but also cardiovascular protection. Recently, in a symposium on food chemistry at the annual meeting of the National Chemical Society, there was new scientific evidence that coffee contains powerful antioxidants that have cardiovascular protective properties. These polyphenols, also known as flavonoids, have a superb antioxidant capacity.

Gout prevention

Elevated uric acid in the blood is the main cause of gout, and increasing your daily coffee intake can significantly reduce uric acid levels in the blood. Coffee lovers, especially those who have to drink more than two cups of coffee a day on average, already have significantly lower levels of uric acid in their blood, thus greatly reducing the probability of developing gout.

Mood regulation

After ten years of research, a professor at the University of Bristol in England found that people become more alert and able to concentrate after drinking a cup of coffee. Coffee stays in the body for three to five hours, so it has a long-lasting refreshing effect. So when you are not energetic enough, a cup of coffee can improve your alertness. When you feel mentally tired, drink a cup of coffee, with a refreshing effect on the brain, instantly let you spirit up.

Weight loss

If you want to get your tongue satisfied, but do not want to gain weight, afternoon tea with a cup of black coffee and milk is excellent excellent. A steaming cup of black coffee has only 2.55 kilocalories, it can also help you promote blood circulation, faster consumption of body heat, effective fat decomposition, to prevent cardiovascular disease. Black coffee also has a diuretic effect.

Promote blood circulation and remove blood stasis

Linoleic acid contained in coffee has the effect of hemolysis and organizing thrombosis, enhancing vasoconstriction and promoting blood circulation, which can relieve headaches, especially migraines, caused by vasodilation.

Beauty

Because coffee has the function of promoting kidney function, diuretic effect, coffee can help the body timely discharge of metabolic waste, coffee also contains flavonoids, antioxidant effect is far more than vitamin E, has a beauty care, delay the role of aging.

The bad effects of drinking coffee

Causes osteoporosis

Caffeine is easy to bind free calcium in the body and excreted through the urine. The reduction of free calcium is bound to cause the decomposition of bound calcium, resulting in osteoporosis, so people who like to drink coffee should pay more attention to calcium supplementation.

Worse mood, insomnia

Caffeine has a stimulating effect, too much coffee at once will worsen mood. The average person absorbs more than 400 mg (4 cups) of caffeine a day, it will bring negative effects, will make people irritable, want to aggression, trouble. And if you drink coffee before bed, you will lose sleep because your mind is in too excited state.

Loss of appetite

Caffeine can refresh the mind because it stimulates the sympathetic nerves, but at the same time, it has the side effect of making people lose their appetite. When drinking coffee on an empty stomach, the stomach will be stimulated and gastric juice secretion will increase, which is not good for patients with gastric ulcers.

Reduces sexual desire

Men who drink too much coffee before intercourse will be similar to the sympathetic nerve overexcitation, while the parasympathetic nerve is inhibited. The sympathetic nerves will be overexcited so that people can not relax and immerse themselves in a pleasurable atmosphere, the good emotions of sex will be replaced by anxiety, the clinical manifestation of the loss of libido, erection is inhibited, so that the quality of sex life is also greatly reduced.

How much coffee a day is appropriate

The most important ingredient in coffee is "caffeine". For the human body, the right amount of caffeine can reduce muscle fatigue, promote the secretion of digestive juices, can also promote kidney function. But too much can lead to caffeine toxicity, increasing the risk of heart disease, accelerating the loss of calcium, leading to osteoporosis. Therefore, the most important thing to note about drinking coffee is whether the caffeine overconsumption. Studies have shown that young children aged 4 to 6 should not exceed 45 mg a day, the upper limit of 63 mg for ages 7 to 9, 85 mg for ages 10 to 12, and normal adult caffeine intake is limited to 300 mg per day. Brewed coffee: 200 mg of caffeine per 340 g serving. Instant coffee: 340 grams per can contains 140 mg of caffeine.

Precautions

It is best not to drink coffee at night; you should not drink coffee after drinking during the day; you should not drink coffee while smoking; you should pay attention to calcium supplementation when drinking coffee, that is, you should eat more calcium-rich foods such as soy products, nori, shrimp, rape, etc.; people suffering from arteriosclerosis, hypertension, heart disease and gastric ulcer should not drink coffee; you should limit the amount of sugar when drinking coffee to prevent the increase of serum cholesterol, protein and neutral fat Concentration increases, and will promote atherosclerosis; diabetic patients, drinking coffee should not put sugar; taking western medicine dysentery avoid drinking coffee.