1. Coffee contains some nutrients. Nicotinic acid in coffee contains vitamin B, and roasted coffee beans have higher content. But also free fatty acids, caffeine, tannic acid and so on.

2. Coffee is good for the skin. Coffee can promote metabolic function, activate digestive organs and play a great role in constipation. Bathing with coffee powder is a kind of hyperthermia, which has the function of losing weight. Drinking a cup of coffee after a meal also helps digestion.

3. Coffee has the function of relieving alcoholism. Drinking coffee after drinking will quickly oxidize acetaldehyde converted by alcohol, decompose it into water and carbon dioxide and excrete it.

4. Coffee can relieve fatigue. To eliminate fatigue, we must supplement nutrition, rest and sleep, and promote metabolic functions, and coffee has these functions.

Three cups of coffee a day can prevent gallstones. For caffeinated coffee, it can stimulate gallbladder contraction and reduce cholesterol which is easy to form gallstones in bile. Recently, researchers at Harvard University found that men who drink two or three cups of coffee a day have a lower risk of gallstones than 40%.

6. Drinking coffee regularly can prevent radiation injury. Radiation hazards, especially electrical radiation, have become the prominent pollution at present. Baba's Indian atomic researchers reached this conclusion in mouse experiments and said it can be applied to humans.

7. The health function of coffee. Coffee has the functions of resisting oxidation, protecting the heart, strengthening bones and muscles, benefiting the waist and knees, stimulating appetite, promoting eating, reducing fat and digestion, inducing resuscitation and removing dampness, promoting blood circulation and removing blood stasis, calming wind and relieving spasm.

8. The influence of coffee on mood. Experiments show that the average person absorbs 300 mg (about 3 cups of brewed coffee) every day, which will have a good influence on a person's alertness and mood.

The following six kinds of people should not drink coffee:

Suffering from hypertension, coronary heart disease, arteriosclerosis and other diseases-drinking coffee for a long time or in large quantities can cause cardiovascular diseases.

Older women-coffee can reduce calcium and cause osteoporosis. After menopause, women need to supplement ten times as much calcium every day.

Patients with stomach trouble-drinking too much coffee will make stomach trouble worse.

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

Vitamin B 1 deficiency-vitamin B 1 can keep the balance and stability of the nervous system, and coffee can destroy it.

Cancer patients-drinking too much coffee is dangerous for normal people.

Because coffee stimulates the brain so strongly that it directly affects the mental state, when coffee was first introduced to Europe in the16th century, people thought that coffee could only be drunk with a doctor's prescription. In the past four or five centuries, with the vigorous development of coffee culture, people can't live without coffee for a day, but the medical profession has suggested that the influence of coffee on the human body is not only refreshing.

Let's start with the refreshing effect of coffee. According to research, drinking 100-200mg of caffeine every day is enough to refresh the mind and is harmless to the body. For office workers, the best time to drink coffee is after breakfast in the morning, when they first arrive at the office, and after lunch break, when they are ready to start busy work in the afternoon. At this time, a cup of coffee can avoid the usual drowsiness after dinner.

The study also found that, for the average person, a cup of coffee in the morning and a cup of coffee in the afternoon have the best refreshing effect. If it exceeds this amount, it will not only fail to achieve the refreshing effect, but also make people fidget.

Drinking too much coffee will also lead to the loss of calcium, which is a great threat to the elderly, especially middle-aged and elderly women. Two or more cups of coffee a day will increase the probability of fracture by about 50%, which is shocking. Experts believe that it is safest for the elderly to drink coffee once a day.

There may be some things you don't know about the advantages and disadvantages of coffee:

Filtering coffee will not increase cholesterol, while drinking coffee will slightly increase LDl bad cholesterol, but it will also increase HDL good cholesterol.

Coffee can stimulate about one-third of healthy people to defecate. Occasionally, when defecation is not smooth, drinking a cup of espresso will have an unexpected laxative effect.

Coffee can reduce the incidence of Parkinson's disease.

Drinking coffee when diarrhea, the diuretic effect of coffee, will promote the discharge of water in the body and aggravate diarrhea.

Coffee can stimulate gallbladder contraction, and people with gallstone tendency are forbidden to drink coffee.

Drinking too much coffee can easily lead to spontaneous abortion of pregnant women.

Caffeine in coffee can inhibit asthma. When asthma attacks, patients can be given two cups of strong coffee urgently, because coffee has the function of bronchial medicine. People who drink coffee regularly have less asthma.

Coffee can also eliminate depression and improve sexual desire.

Coffee is indeed a wonderful food, but how to benefit from it and avoid its harm depends on your physical condition and weight.