You won’t get spots on your face if you drink coffee regularly.

Disadvantages of drinking coffee:

1. Heart. Caffeine acts on the heart in two ways: In addition to affecting the brain centers that regulate the cardiovascular system, it also acts directly on the heart. High doses of caffeine can increase the heart rate by 10 to 20 beats per minute in people who are intolerant to caffeine, and may cause temporary irregular heartbeats in some people.

Thus, moderate consumption of caffeinated beverages (up to an average of 500 milligrams per day) does not significantly increase the risk of heart disease, but exceeding this dose may increase the risk of myocardial infarction.

2. Kidney. Falling in love with the toilet after drinking coffee in the morning is something that many people often encounter. This is because caffeine affects the adenosine receptors in the kidneys, acting like a diuretic. Caffeine may also slow the brain's release of a type of antidiuretic hormone that reduces urine production.

3. Digestive system. The acid, oil and caffeine in coffee may irritate the gastric mucosa and promote gastric acid secretion. Long-term consumption of large amounts of caffeine-containing drinks can cause gastric problems.

4. Respiratory system. Caffeine and similar drugs have two effects on breathing. One is to increase the breathing rate. In addition, caffeine can relax the smooth muscles around the trachea, thereby dilating the trachea and increasing respiratory volume. However, caffeine cannot be used clinically as a drug to treat asthma.

5. Reproductive system. Studies have shown that women who drink coffee during pregnancy have babies with lower birth weight. Studies have also shown that taking caffeine (equivalent to drinking more than one cup of coffee per day) may significantly reduce a woman's chance of conceiving.

6. Eyes. Caffeine constricts (narrows) the capillaries in the eye, allowing less nutrients to enter the eye cells and reducing the rate at which the eye removes waste products.

Benefits of drinking coffee:

1. Coffee contains certain nutrients. The niacin in coffee contains vitamin B, and the content is higher in roasted coffee beans. And there are free fatty acids, caffeine, tannins, etc.

2. Coffee is good for the skin. Coffee can promote metabolic function, activate digestive organs, and is very effective in treating constipation. Taking a bath with coffee powder is a kind of warm therapy and has the effect of losing weight.

3. Coffee has the function of relieving hangover. Drinking coffee after drinking alcohol will rapidly oxidize acetaldehyde converted from alcohol, decompose it into water and carbon dioxide and be excreted from 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. Caffeinated coffee can stimulate the contraction of the gallbladder and reduce the cholesterol in the bile that easily forms gallstones. Recently, researchers from Harvard University in the United States found that men who drink two to three cups of coffee a day have a lower than 40% chance of developing gallstones.

6. Regular drinking of coffee can prevent radiation damage. Radiation damage, especially radiation from electrical appliances, has become a more prominent form of pollution. Indian atomic researchers reached this conclusion in experiments on mice and said it can be applied to humans.

7. The health and medical functions of coffee. Coffee has the functions of antioxidant and heart protection, strengthening muscles and bones, benefiting the waist and knees, stimulating appetite and promoting food intake, eliminating cellulite and accumulation, promoting orifices and dehumidification, activating 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 of caffeine a day (about 3 cups of brewed coffee), which will have a good impact on a person's alertness and mood.

The following people should not drink coffee:

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

Older women - coffee can reduce calcium and cause osteoporosis. After menopause, women need ten times more calcium every day.

Patients with stomach problems - excessive coffee consumption can worsen stomach problems.

Pregnant women - drinking too much coffee can cause fetal malformations or miscarriage.

Those who are deficient in vitamin B1 - Vitamin B1 can maintain the balance and stability of the nervous system, but coffee has a damaging effect on it.

Cancer patients—drinking excessive amounts of coffee poses a risk of cancer to normal people.

Do not drink coffee on an empty stomach because coffee can stimulate gastric acid secretion, especially people with gastric ulcers should be cautious. As a drink, coffee should be consumed in moderation according to individual circumstances. Generally speaking, nutrition emphasizes a balanced diet and less spicy food.