1, to prevent allergies. Caffeine can stimulate and excite sympathetic nerves, so drinking a cup of coffee can help prevent allergies. Allergy, asthma, etc. Drinking a cup of coffee in advance can not only make use of the exciting effect of caffeine, but also adjust the psychology.

2, maintain the skin. Caffeine has the functions of accelerating skin metabolism, reducing dark circles caused by blood circulation, resisting oxidation, keeping skin full of strength and delaying aging.

3. Promote intestinal peristalsis. The content of soluble dietary fiber in coffee is very high, which can accelerate gastrointestinal peristalsis. For women with mild constipation, you can also drink some coffee to relieve constipation.

Disadvantages:

1, which leads to anesthesia. If a person who drinks coffee regularly reduces the amount of coffee by half, it will cause headache, muscle pain, fatigue, inattention, nausea and other symptoms.

Drinking too much coffee can also lead to paralysis or impotence.

If you drink more than three cups of coffee at a time, you will experience emotional tension, anxiety and shortness of breath. If you drink more than ten cups, it will cause poisoning, such as dizziness, tinnitus, elevated blood pressure, blurred vision, rapid arrhythmia, and even nervous disorder and muscle tremor. The dose of caffeine poisoning is generally 0.5 ~1g.

Extended data:

The best time to drink coffee

Drink coffee before and after meals.

Before eating, or half an hour after eating, this time can be said to be the best time to drink coffee in a day. So drinking coffee at this time can promote the digestion of food in the stomach and reduce the workload of the stomach.

Moreover, this will not adversely affect the normal function of the human body to absorb iron in food. In addition, people with iron deficiency anemia should avoid drinking coffee within half an hour before and after meals to avoid aggravating iron deficiency.

2. Drink coffee before exercise

Drinking coffee half an hour before exercise is more conducive to the burning of body fat during exercise. Because coffee can accelerate metabolism after entering the human body, the calories consumed by the body also increase. Most calories are converted from fat, so drinking coffee half an hour before exercise can reduce the body fat content.

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