Many people will say that drinking coffee hurts the stomach and easily causes nervousness and palpitation. After drinking coffee, my hands will tremble and I dare not try, but it also has many unknown benefits. As long as you know how to be timely and moderate, you can give full play to the benefits of coffee.
The benefits of caffeine to human body.
1. Caffeine can stimulate the central nervous system and muscles, so it can boost the spirit, improve thinking and memory, and restore muscle fatigue.
2. Acting on the cardiovascular system can improve heart function, relax blood vessels and promote blood circulation.
3. For the gastrointestinal system, it can help digestion and help the decomposition of fat.
Recently, a new American study shows that drinking coffee can enhance sexual desire, because coffee can improve blood circulation, speed up the heartbeat and stimulate the activity of nervous system. Therefore, people who drink coffee regularly are more active in sexual life than those who don't drink coffee regularly, and not only that, but also reduce the chance of impotence.
The harm of caffeine
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 and adversely affect the preservation of bone mass. For women, it may increase the threat of osteoporosis. 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.
The composition of coffee
Coffee beans themselves contain vitamin B and nicotinic acid, roasted coffee beans contain more than raw coffee beans, and the rest also contain free fatty acids, caffeine and tannic acid, so coffee itself has calories, but not much. The main calories come from the creamer and sugar you add when you drink coffee.
How to drink coffee?
Although coffee is good for the human body, it must be moderate, not more than 4 cups a day, about 800- 1000cc. 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.
Drinking coffee depends on the time.
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.
These people drink coffee carefully.
1. Patients with liver disease: Caffeine will prolong the time of caffeine in the body. It takes 2 hours for normal adults to metabolize caffeine, but it may take 4-5 hours for patients with liver disease or liver insufficiency. Therefore, patients with liver disease must be careful when drinking coffee, and it is best not to drink it after the evening, so as to avoid long metabolism time affecting sleep, and it is best not to exceed 1 cup a day.
2. Patients with digestive system diseases: I believe that people who often have stomachaches and stomach problems have an experience that doctors will definitely tell them not to eat irritating foods, including wine, peppers, coffee, tea and carbonated drinks.
Coffee is one of them, because its tannic acid can stimulate gastric acid secretion. If you are a patient with acute digestive system diseases, you must avoid drinking it. After recovery, if you drink coffee occasionally, it is best to use it after meals to avoid drinking coffee on an empty stomach.
3. Pregnant women: Many women will pay special attention to all the foods they eat after pregnancy, and caffeinated drinks are of course listed as one of the taboos. This is mainly due to the slow metabolism of caffeine in pregnant women, which will prolong the time of caffeine staying in the body, while it takes eight or nine months for the fetus in the abdomen to remove caffeine from the blood through metabolism.
4. Children: Because children's liver and kidney are not fully developed and their detoxification ability is poor, the half-life of caffeine metabolism will be prolonged, so generally speaking, children under 12 need to ban caffeine intake. Even Europeans and Americans who drink coffee as boiling water all day have strict restrictions on children's drinking coffee.
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