Popular science | it's not too late for coffee lovers.

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Coffee is a fashionable refreshing drink.

But for the quality of drinking coffee

There is always controversy.

Let's take a look at it together.

The pros and cons of drinking coffee!

The benefits of drinking coffee

1. Anti-fatigue

We all know that coffee has a refreshing and anti-fatigue effect, which is why we like it. Caffeine in coffee can stimulate brain nerves and promote excitement, speed up the body's metabolism, thereby eliminating fatigue.

2. Prevention of gallstones

Caffeine can stimulate gallbladder contraction and reduce the content of cholesterol in bile, thereby preventing the formation of gallstones.

3. Skin care

Although coffee is bitter and dark in color, it is rich in antioxidants and vitamins, which can resist the damage of free radicals to skin cells, speed up human metabolism and help blood circulation, so as to achieve the effect of beauty, skin care and anti-aging.

4. Prevention of dry eyes

Autumn and winter climate is dry, many computer users will feel dry eyes, the problem of dry eyes, and coffee contains purine substances can stimulate eye glands to secrete fluid to protect the eyes.

The disadvantages of drinking coffee

1. Lead to calcium loss

Nowadays, Chinese people have a high rate of calcium deficiency, and caffeine in coffee can increase the loss of calcium, leading to osteoporosis. It is especially harmful to the elderly and growing children.

2. Cause insomnia

Since caffeine has refreshing and anti-fatigue effects, its side effect is that it can lead to insomnia, which can also cause anxiety. Especially those who do not sleep well on weekdays must drink less.

3. Make the teeth yellow

The color of coffee is very dark, it is an acidic drink, it is easy to make the teeth yellow, and long-term drinking is not conducive to dental health. Control the amount when drinking and can add some milk and sugar to neutralize acidity and reduce the effect of coffee pigment on teeth.

4. Aggravate hypertension

Caffeine is a substance that increases blood pressure. Long-term consumption can lead to aggravation of cardiovascular disease and hypertension, so people who already have high blood pressure must drink less coffee.

5. Aggravate stomach disease

If friends with stomach problems or gastrointestinal problems drink too much coffee, it will worsen stomach problems, aggravate discomfort, and affect appetite.