1, coffee contains nicotinic acid, which is a kind of vitamin B. Drinking coffee can supplement the nutrition of vitamin B.

2. Coffee contains free fatty acids, caffeine, tannic acid and other substances that can be absorbed by the human body.

3. Coffee is helpful for constipation patients, because coffee is beneficial to human metabolism and promotes waste excretion.

4. Coffee can also be used for hangover. Coffee can promote the decomposition of alcohol, so that alcohol can be converted into water and carbon dioxide, which can be quickly excreted.

Drinking coffee regularly can also prevent radiation damage.

Studies have shown that many people are now injured by the radiation of electrical appliances, and drinking coffee can have a certain impact. Disadvantages include:

1, nervous, even flustered and sweaty. This is because too much coffee will make the nerves excessively excited and nervous, and keep alert at all times.

2. Hypertension is getting worse. Coffee itself has the effect of raising blood pressure, and if you are hypertensive, drinking coffee will undoubtedly aggravate your condition, so patients with hypertension should try not to drink coffee.

3. Causes osteoporosis, especially for middle-aged and elderly women. If you drink a lot of coffee for a long time, under the diuretic effect of coffee, the calcium that is not absorbed enough will be excreted with urine, which will lead to bone calcium deficiency and osteoporosis.

4. Fetal malformation. Long-term excessive drinking of coffee by pregnant women can lead to miscarriage and even fetal malformation. So pregnant women had better not drink coffee with them.

5. Destroy the absorption of vitamin B 1. Because vitamin B 1 plays a great role in maintaining the balance of the nervous system, but coffee will destroy this balance, so it is best not to drink coffee if vitamin B 1 is lacking.