1.refresh the brain Caffeine stimulates the central nervous system, can make the mind more awake, the ability to think, focus, improve work efficiency;

2.strong bones, waist and knees Caffeine can make the muscles free contraction, can improve motor function. Caffeine can make the muscles contract freely, which can improve the motor function.

3. Caffeine stimulates the gastrointestinal secretion of gastric acid, which promotes intestinal peristalsis, helps digestion, prevents gastroptosis, and has the effect of rapid laxative.

4. Caffeine can promote kidney function, expel excess sodium ions, improve urination and improve bloating and edema.

5. Activating blood circulation and removing blood stasis The linoleic acid contained in coffee can dissolve blood and prevent the formation of blood clots, enhance vascular constriction, relieve migraine and reduce the chance of stroke.

6. Caffeine can inhibit the parasympathetic nervous system and reduce the attack of asthma.

7. Dampness and deodorization Caffeine contains tannin, which has a strong adsorption capacity for flavor. If your apartment has just been renovated, a pot of coffee indoors, the odor will be quickly removed.

8. Drinking coffee can protect the liver and relieve alcohol.

9, coffee can lose weight The best time to drink coffee to lose weight is 30 minutes to an hour after lunch and before work, taste a cup of strong black coffee without sugar, and with walking, can promote fat burning.

10, black coffee can effectively improve low blood pressure.

11, black coffee has an antioxidant effect, helps to prevent cancer, anti-aging.

Coffee, we have always spoken from the emotional point of view. Today, let's look at its essence.

1. Coffee contains certain nutrients. Coffee's nicotinic acid contains vitamin B. Roasted coffee beans contain more. And there are free fatty acids, caffeine, tannins and so on.

2. Coffee is good for the skin. Coffee can promote metabolic function, vitalize the digestive organs, and has a great effect on constipation. Bathing with coffee powder is a warm therapy and has a weight loss effect.

3. Coffee has the function of alcohol detoxification. Drinking coffee after drinking alcohol will make the acetaldehyde transformed from alcohol oxidize quickly and decompose into water and carbon dioxide and be discharged out of the body.

4. Coffee can eliminate fatigue. To eliminate fatigue, it is necessary to supplement nutrition, rest and sleep, and promote metabolic function, and coffee has these functions.

5. Three cups of coffee a day can prevent gallstones. For caffeine-containing coffee, which can stimulate gallbladder contraction and reduce cholesterol in the bile that is prone to form gallstones, the latest U.S. researchers at Harvard University found that men who drank two to three cups of coffee a day had less than a 40 percent chance of getting gallstones.

6. Drinking coffee can prevent radiation damage. Radiation damage, especially radiation from electrical appliances has become a more prominent type of pollution. India Ba Ba atomic researchers in the rat experiment to get this conclusion, and said can be applied to humans.

7. Coffee health medical function. Coffee has antioxidant and cardioprotective, strong bones, lumbar and knee, appetizing and promote food, fat elimination and elimination of stagnation, sharp and dehumidification, blood circulation, resting the wind and antispasmodic and other roles.

8. The influence of coffee on mood. Experiments show that the average person absorbs 300 milligrams (about 3 cups of brewed coffee) of caffeine a day, a person's alertness and mood will bring good effects.

The following six kinds of people should not drink coffee:

Suffering from hypertension, coronary heart disease, atherosclerosis and other diseases - long-term or large amounts of coffee consumption, can cause cardiovascular disease.

Elderly women - coffee reduces calcium and causes osteoporosis. After menopause, women need to add ten times the amount of calcium per day.

Stomach disease patients - drinking too much coffee can cause worsening of stomach disease.

Pregnant women - drinking too much coffee can lead to fetal malformation or miscarriage.

Vitamin B1 deficient people - Vitamin B1 can maintain the balance and stability of the nervous system, and coffee has a destructive effect on it.

Cancer patients - Drinking excessive amounts of coffee poses a cancer risk to normal people.

Close contact with coffee

Caffeine can invigorate the spirit, enhance thinking ability, and restore muscle fatigue due to its effect of stimulating the central nervous system and muscles. Acting on the cardiovascular system, it can improve heart function, stretch blood vessels and promote blood circulation. For the gastrointestinal system, it can help digestion and the decomposition of fat.

Helps weight loss

I believe that many people have heard that drinking black coffee can help you lose weight, in fact, this is only one of the factors, caffeine can indeed accelerate the breakdown of fat, but at the same time, it is more important to rely on the movement of the muscles, in order to convert the excess fatty acids into calories to be consumed, and if there is no movement to go along with it, excess fatty acids and back down the bloodstream to re-accumulation of fat. Fat will build up again. Therefore, after drinking coffee, you need to be active at the same time, in order to play a real weight loss effect! Coffee itself has calories, but not many. The main calories are in the creamer and sugar you add to your coffee.

Antioxidant capacity

In recent years, as long as the antioxidant function of the food are in the market in a big way, generally known vegetables and fruits rich in A, C, B vitamins, as well as quite popular in Japan, the tea, the reason why it is regarded as a healthy food is that they are rich in antioxidants, can fight against free radicals on the body's damage. A few days ago, a research report pointed out that coffee contains four times more antioxidants than tea, and can fight cardiovascular disease, and coffee itself is also in line with the principle of antioxidants, color (dark) and has a bitter taste. The antioxidant content of each coffee varies according to the way it is brewed, for example, Americano contains the least amount of antioxidants, while Espresso contains the most antioxidants. Coffee does not lose its antioxidant effect when creamer is added.

Improve dry eyes

Overseas reports indicate that coffee drinkers are significantly less likely to suffer from dry eyes than non-coffee drinkers. This is mainly related to the purine component of coffee (eye drops containing purine, can stimulate the glands to secrete fluid, the eyes have some kind of protective effect). This is certainly good news for coffee drinkers, but it should be noted that coffee itself has a diuretic effect, and even though some of its components have a protective effect, caffeinated beverages must be banned from those who already suffer from dry eye, as well as from those who take any medication containing diuretic ingredients, so as not to exacerbate the loss of water from the body.

Can relieve pain

Headaches caused by a night's sleep, or pain caused by vasoconstriction on the side of the temples, which are not caused by organic factors, can be relieved by coffee, but it must be drank in the morning or at noon (Note: not allowed from late afternoon to night).

The amount of coffee

Coffee is good for the human body, but you can't drink too much, no more than 2 cups a day, for people who are easily nervous and anxious, drinking too much may be harmful.

Drinking coffee time

Drinking coffee is best after breakfast and lunch, because it can promote gastrointestinal peristalsis, help digestion, and can break down the high-calorie, high-fat food that is eaten, and will not stimulate the intestines and stomach, like drinking coffee on an empty stomach. It is best not to drink coffee after dinner for fear that it will have an impact on sleep.

If you want to stay up all night by drinking coffee, you may drink too much without realizing it, which is not good for your body.

Caffeine helps improve alertness, sensitivity, memory and concentration. But drinking more coffee than you're used to can be similar to consuming the same dose of a stimulant, which can cause nervousness. For people who tend to have anxiety disorders, caffeine can cause sweaty palms, palpitations, and ringing in the ears to worsen these symptoms.

Exacerbating high blood pressure

Caffeine is often combined with other simple painkillers because of its own painkilling properties, but taken in large amounts over a long period of time, using large amounts of caffeine will only worsen your condition if you already have high blood pressure. Because caffeine alone can raise blood pressure, and when combined with emotional stress, it can have a dangerous multiplying effect, people at risk for high blood pressure should especially avoid caffeinated beverages during stressful times at work. Some people who are regular coffee drinkers think they are immune to the effects of caffeine, but this is not the case, as one study showed that a cup of coffee can raise blood pressure for up to 12 hours.

Inducing osteoporosis

Caffeine itself has a good diuretic effect, and if you drink a lot of coffee for a long time and a lot of it, it is easy to cause bone loss, which will have a negative impact on the preservation of bone mass, and in the case of women, it may increase the threat of osteoporosis. However, the premise is that the usual food originally lacks the intake of sufficient calcium, or infrequent movement of people, coupled with post-menopausal women, due to the lack of estrogen caused by the loss of calcium, the above conditions plus a large amount of caffeine, may pose a threat to the bone. If you can enjoy it in reasonable amounts, you can still do it without choking.

Drink coffee with caution for these people

People with liver disease

Caffeine prolongs the time it takes for caffeine to thank in the body. The metabolism of caffeine takes 2 hours in normal adults, but in patients with liver disease or liver dysfunction, the metabolism of caffeine may take 4-5 hours, so patients with liver disease should be careful when drinking coffee, and it's best not to drink it in the evening, so as to avoid affecting sleep due to the metabolism of the time is long, and the best one day not more than 1 cup.

Patients with digestive disorders

It is believed that people who often suffer from stomach pains and stomach diseases have an experience, that is, the doctor must be instructed not to eat stimulating foods, including: alcohol, chili peppers, coffee, tea, carbonated beverages.

The reason why coffee is on the list is that the tannins in it stimulate the secretion of gastric acid, which must be avoided if the patient is in the acute stage of digestive diseases. After the recovery of health, if you occasionally drink coffee, it is also best to use after meals, avoid drinking coffee on an empty stomach.

Pregnant women

Many women start to eat all the food from the beginning of their pregnancy, and caffeinated beverages are of course also listed as one of the taboos. This is mainly due to the slow metabolism of caffeine for pregnant women, caffeine stays in the body for a longer period of time, and the fetus in the womb until eight or nine months of age, to be able to metabolize and remove caffeine from the blood.

Children

Because of the incomplete development of children's liver and kidneys, the detoxification ability is poor, so that the half-life of caffeine metabolism will be extended, so in general, children under the age of 12 years old need to prohibit the intake of caffeine. Even if you drink coffee as water all day long in Europe and the United States, there are very strict restrictions on children drinking coffee.