Disadvantages of coffee Disadvantages of coffee:
1. aggravate hypertension
Caffeine is often combined with other simple painkillers because of its analgesic effect. However, if you take a lot of caffeine 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, if combined with emotional tension, it will have a dangerous multiplier effect. Therefore, people at risk of hypertension should especially avoid drinking caffeinated drinks when working pressure is high. Some people who drink coffee all the year round think they are immune to the effects of caffeine, but this is not the case. A study shows that after drinking a cup of coffee, the blood pressure can rise for as long as 12 hours.
2. Induced osteoporosis
Caffeine itself has a good diuretic effect. If you drink a lot of coffee for a long time, it will easily lead to bone loss, which will adversely affect the preservation of bone mass and may increase the threat of osteoporosis in women. However, the premise is that people who usually have insufficient calcium intake in food, or people who don't exercise often, and postmenopausal women, due to insufficient estrogen, calcium loss, 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 do it without choking.
3. Overdose will affect alertness and memory.
Although coffee is good for the human body, it must be moderate, not more than 4 cups a day, about 800- 1000 cc. For people who are easily nervous and anxious, excessive drinking may be harmful-caffeine helps to improve alertness, sensitivity, memory and attention. But if you drink more coffee than you are used to, you will have the same dose of stimulants, which will cause tension. For people with anxiety tendency, caffeine can aggravate the symptoms of sweating, palpitation and tinnitus.
4. drinking coffee incorrectly will affect sleep.
It is best to drink coffee after meals, because coffee can promote the peristalsis of the stomach, help digestion, decompose the high-calorie and high-fat food just eaten, and will not stimulate the stomach because of drinking coffee on an empty stomach. If you drink it every day, it will have a good effect on improving constipation.
It is best not to choose after meals, for fear of affecting sleep. If you want to stay up late by drinking coffee, you may unconsciously drink a lot, which is not good for your health.
In addition, 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.
You can refer to these, or you can find relevant information on the Internet yourself.