The advantages and disadvantages of drinking coffee should not be consumed too much.

Taboos on drinking coffee

1. Remember that coffee should not be served with tea. Tannic acid in tea and caffeine reduces iron absorption by 75%. It is appropriate to use warm boiled water to deliver the service.

two。 The tannic acid in tea and coffee reduces calcium absorption. Therefore, it is best to choose between two meals for tea and coffee.

3. Caffeinated drinks and foods can cause nausea, vomiting, headache and rapid heartbeat after being consumed by pregnant women. Caffeine also enters the fetus through the placenta, affecting fetal development.

4. Many doctors believe that pregnant women drink 1 to 2 cups of coffee, tea or carbonated drinks a day (6 to 8 ounces each), which will not affect the fetus. But as a precaution, pregnant women had better forbid it. Caffeine can lead to an increase in the abortion rate, so you should drink non-caffeinated drinks

5. People who want to lose weight should not drink too much coffee. The common coffee companion contains more milk, sugar and fat. Coffee itself may stimulate gastric juice secretion and enhance food digestion and absorption, which not only can not lose weight, but also make people fat.

6. Coffee is not suitable for children. Caffeine can excite the central nervous system of children, interfere with their memory and cause ADHD.

7. Strong tea, coffee and carbonated drinks are also risk factors for digestive tract ulcer.

8. Confusing caffeine in times of stress helps to improve alertness, agility, memory and concentration. But drinking more coffee than you are used to will produce the same dose of stimulants that you are used to, which can cause nervousness. For people who tend to have anxiety disorders, caffeine can worsen symptoms such as sweaty palms, palpitations and tinnitus.

9. Aggravate high blood pressure caffeine is often combined with other simple painkillers because of its analgesic effect, but if you take it in large quantities for a long time, if you already have high blood pressure, using a lot of caffeine will only make your situation worse. Because caffeine alone can raise blood pressure, coupled with emotional stress, it can have a dangerous multiplication effect, so people at risk of high blood pressure should especially avoid drinking caffeinated drinks during stressful times at work. Some people who have a perennial habit of drinking coffee think they are immune to the effects of caffeine, but this is not the case. A study shows that blood pressure can rise for up to 12 hours after drinking a cup of coffee.

10. Induced osteoporosis caffeine itself has a good diuretic effect. If you drink a lot of coffee for a long time, it is easy to cause bone loss, which will adversely affect the preservation of bone mass. For women, it may increase the threat of osteoporosis. But the premise is that people who don't get enough calcium in normal food, or people who don't move very often, plus women after menopause, calcium loss caused by lack of estrogen, coupled with a large amount of caffeine, may pose a threat to bones. If you can enjoy it in a reasonable amount, you can still stop eating for fear of choking.

The benefits of drinking coffee

1. Coffee contains certain nutrients. Nicotinic acid in coffee contains vitamin B, which is higher in roasted coffee beans. And there are free fatty acids, caffeine, tannic acid and so on.

two。 Coffee is good for the skin. Coffee can promote metabolic function, activate digestive organs, and has a great effect on constipation. Taking a bath with coffee powder is a kind of thermotherapy, which has the effect of losing weight.

3. Coffee can relieve fatigue. In order to eliminate fatigue, we must supplement nutrition, rest and sleep, and promote metabolic functions, and coffee has these functions.

4. Three cups of coffee a day can prevent gallstones. For caffeinated coffee, it stimulates gallbladder contraction and reduces cholesterol, which is prone to gallstones. The latest Harvard University researchers found that men who drank two to three cups of coffee a day were less than 40% likely to get gallstones.

5. Drinking coffee regularly can prevent radiation damage. Radiation damage, especially the radiation of electrical appliances, has become a prominent pollution at present. Indian Barba atomic researchers have come to this conclusion in mouse experiments and say it can be applied to humans.

6. The health care and medical function of coffee. Coffee has the functions of anti-oxidation and heart protection, strengthening muscles and bones, benefiting waist and knees, appetizer, eliminating fat and accumulation, promoting orifice and dehumidification, promoting blood circulation and removing blood stasis, relieving wind and relieving spasm and so on.

7. The influence of coffee on mood. Experiments show that the average person absorbs 300 milligrams of caffeine (about 3 cups of brewed coffee) a day, which has a good effect on a person's alertness and mood.

Excessive drinking

In the case of long-term intake, large doses of caffeine is a drug that can cause "caffeine poisoning". Caffeine poisoning includes addiction and a range of physical and psychological side effects, such as nervousness, irritability, anxiety, tremors, muscle convulsions (hyperreflexia), insomnia and palpitations (most people take caffeine because of its irritating effects. Many students take caffeine pills when preparing for exams and those on night shifts. Under the strict definition of addiction, only a gradual increase in dosage is addictive, and caffeine dependence is more appropriate, but under a widely accepted definition, all chronic behaviors that are difficult to get rid of are called addictions. so it can also be described as caffeine addiction.) In addition, because caffeine can increase stomach acid, sustained high doses can lead to peptic ulcers, erosive esophagitis and gastroesophageal reflux disease. However, because both normal coffee and decaffeinated coffee stimulate the gastric mucosa and increase gastric acid secretion, caffeine may not be the only ingredient in coffee.

Four caffeine-induced disorders verified by the Diagnostic and Statistical Manual of Mental Disorders (fourth Edition) include caffeine overexcitement, caffeine anxiety, caffeine sleep disorders and other caffeine-related disorders.