Do you know the pros and cons of coffee if you drink it often?

How many cups of coffee is best to drink every day?

1 cup of coffee: Greek researchers conducted a study on 485 people over the age of 65 and found that drinking 1 cup of coffee a day can keep arteries healthy and stabilize blood pressure. A survey of 600 volunteers by the University of Bristol in the UK also showed that drinking 1 cup of coffee a day can enhance brain power.

2 cups of coffee: A study by the University of Florida in the United States found that 200 mg of caffeine, equivalent to the content of two cups of coffee, can prevent memory loss and Alzheimer's disease. A study in the International Journal of Sports Medicine also showed that drinking coffee 30 minutes before exercise can help improve performance.

3 cups of coffee: A study published in the American Journal of Chemical Medicine found that drinking 3 cups of coffee a day can reduce a woman's risk of ovarian cancer by 1/5. Men who drink 3 cups a day have a 40% lower risk of gallstones.

4 cups of coffee: A study by the University of Utah found that 4 cups of coffee contains about 400 mg of caffeine, which can reduce the risk of oral and laryngeal cancer by 39%. In addition, it can also reduce the risk of colon cancer, breast cancer and type II diabetes.

More than 5 cups: A 10-year study of 90,000 people by Tokyo researchers found that drinking 5 cups of coffee a day can reduce the risk of liver damage by 3/4.

What are the pros and cons of coffee?

Benefits of Coffee:

1. Coffee contains certain nutrients. The nicotinic acid in coffee contains vitamin B, and the content is higher in roasted coffee beans. It also contains free fatty acids, caffeine, tannic acid, etc.

2. Coffee is good for the skin. Coffee can promote metabolism, activate digestive organs, and has a great effect on constipation. Taking a bath with coffee powder is a warm therapy that has the effect of losing weight.

3. Coffee can eliminate fatigue. To eliminate fatigue, you must supplement nutrition, rest and sleep, and promote metabolic function, and coffee has these functions.

Disadvantages of coffee:

1. It causes anesthesia. If a person who drinks coffee regularly cuts his or her coffee intake in half, it will cause headaches, muscle pain, fatigue, inattention, nausea, etc. Researchers suggest that coffee addiction should also be treated as a mental illness or drug addiction.

2. Drinking too much coffee can also cause paralysis or impotence.

3. If you drink more than three cups of coffee at a time, you will feel nervous, anxious, short of breath, etc. If you drink more than ten cups, it will cause poisoning, dizziness, tinnitus, increased blood pressure, blurred vision, rapid heart rate, and in severe cases, it will also cause neurological disorders and muscle tremors. The dose of caffeine poisoning is generally 0.5 to 1 gram.

Know the best time to drink coffee

1. Drink coffee before and after meals

Before or half an hour after a meal is the best time to drink coffee. Drinking coffee at this time can promote the digestion of food and reduce the workload of the stomach. It will not adversely affect the body's normal function of absorbing iron from food. In addition, people with iron deficiency anemia should avoid drinking coffee within half an hour before or after a meal to prevent aggravating iron deficiency.

2. Drink coffee before exercise

Girls who want to lose weight should pay attention. Drinking coffee within half an hour before exercise is more conducive to burning body fat during exercise! After coffee enters the human body, it can speed up metabolism, and the body consumes more calories. Most calories are converted from fat, so drinking coffee half an hour before exercise can reduce body fat content.

3. Drink coffee when you are tired

Many people will find that they are still tired for a while after taking a nap. At this time, you may want to drink a cup of coffee to refresh yourself and remove the fat attached to your stomach after lunch. Generally speaking, a cup of coffee can refresh you for 4 hours. Therefore, it is best not to drink coffee at night to avoid affecting your sleep.

Which groups of people should not drink coffee?

1. Coffee is not suitable for children

Many foreign nutritionists have confirmed that children are the least suitable group to drink coffee because caffeine interferes with brain memory. Although caffeine has a strong excitatory effect on the central nervous system, it can cause children to become irritable, undisciplined, and have poor academic performance. Caffeine may also increase the rate of cell mutation.

2. Pregnant women should not drink coffee

Scientists in California, USA, have shown that caffeine can inhibit the normal development of the fetus in the mother's body. Drinking too much coffee may increase the probability of miscarriage. Even if the baby is born successfully, the baby's weight is generally light and the natural mortality rate is high. Therefore: pregnant women should not drink coffee.

3. Women and the elderly are not suitable for drinking coffee

Excessive caffeine will lead to calcium loss. Drinking it in the elderly will cause osteoporosis and increase the chance of fractures. After menopause, women's bodies need more than 10 times more calcium than before menopause, so postmenopausal women and the elderly are best not to drink coffee.

Tips: How to store coffee correctly?

1. Water is the enemy of coffee storage. Coffee oil is water-soluble. It makes coffee more flavorful, and a humid environment will corrupt coffee oil (oil food). Do not store coffee in the refrigerator's safety layer, because once the refrigerator is opened, moisture will condense on the surface of the container. If you want to store coffee for a long time, it is best to put them in a sealed bag and then put them in the refrigerator's cold layer. If you want to store roasted coffee beans for more than a week, you should also follow the same method. You don't need to thaw them when grinding - you can put them directly into the grinder.

2. Another enemy of coffee beans is oxygen, which can oxidize volatile odors. This is why you should grind coffee just before brewing it. When the coffee bean is ground, most of its surface is exposed to the air. This means that the coffee oils begin to evaporate and the flavor will gradually disappear into the thin air. Don't put coffee near other items with strong odors (such as tea). Because coffee will quickly absorb other odors, please put coffee in a clean, sealed container.