Why do some black people have brown or even bronzed skin?

Adaptation of the human race Black people originated in the tropical equatorial region, which is exposed to direct sunlight for a long time during the year, with high temperatures and strong ultraviolet rays. People who have lived here for a long time, through long-term natural selection, have gradually developed a series of adaptive characteristics: ** high melanin content to absorb ultraviolet rays from sunlight and protect ** internal structure from damage.

Can be diuretic and dehumidifying Caffeine can increase urine output and promote kidney function.

Coffee can ** anti-aging Light roasted coffee has a higher caffeine content **. Black coffee has antioxidant effects, which helps to fight cancer and anti-aging.

Coffee and Preventing Radiation Injuries Radiation injuries have become a prominent type of contamination and hazard at present. Especially the radiation of household appliances: such as people who operate ** for a long time, microwave ovens, televisions at home, etc.

Radiation, especially to pregnant women, has affected the health of the next generation. Reports of this are not uncommon. Indian scientists have found that coffee protects laboratory rats from radiation damage.

However, it is better not to drink coffee instantly, because not only does it not have the above effects, but some of the substances in it can also make people age and gain weight.

There are no scientific studies that show that coffee has this function.

In fact, the beauty aspect of coffee is caffeine.

Caffeine can**, and many creams have caffeine in it.

Once, when Niu Er's teaching DIY** cream, he put Coke because he contained caffeine, but drinking Coke made him fat because of the high sugar content in it.

Therefore, it is helpful to have a clear coffee without sugar, but you can't drink too much, it's not good for the heart or something.

Beauty openly drinks coffee and is a magic weapon for beauty, learn it, and develop a beautiful complexion and good skin!

Drinking coffee has a certain help for beauty. For women, black coffee has a beauty effect, and when consumed regularly, it can make the complexion radiant and radiant. People with low blood pressure can make themselves better by drinking a cup of black coffee every day.

In the process of brewing coffee at high temperatures, an antioxidant compound is also produced, which helps to fight cancer, anti-aging, and even prevent cardiovascular disease.

Disadvantage: 1Confusion when you're nervous.

Caffeine helps improve alertness, alertness, memory and concentration. But drinking more coffee than you're used to can produce a similar dose of stimulant and cause jitters. For people with anxiety disorders, caffeine can worsen symptoms such as sweaty palms, heart palpitations, and tinnitus.

2.Exacerbates high blood pressure.

Caffeine is often combined with other simple analgesics because of its analgesic effect, but if you take a large amount of caffeine for a long time, if you already have high blood pressure, using a large amount of caffeine will only make the situation worse. Because caffeine alone can raise blood pressure, and when combined with emotional stress, it can have a dangerous synergistic effect, so people at risk of high blood pressure should especially avoid drinking caffeinated beverages during stressful work times. Some people who drink coffee all year round think they are immune to the effects of caffeine, but this is not the case, as one study showed that blood pressure can rise for up to 12 hours after drinking a cup of coffee.

3.Induces osteoporosis.

Caffeine itself has a good diuretic effect, if you drink coffee for a long time and in large quantities, it is easy to cause bone loss, which will have an adverse impact on bone preservation, and for women, it may increase the threat of osteoporosis. However, the premise is that people who lack enough calcium in their usual food, or who do not move often, plus postmenopausal women, due to the lack of estrogen caused by calcium loss, the above conditions, 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.

In addition, the following six types of people should not drink coffee:

Suffering from diseases such as high blood pressure, coronary heart disease, arteriosclerosis – long-term or large consumption of coffee can cause cardiovascular disease.

Older women – Coffee reduces calcium and causes osteoporosis. After menopause, women need to increase the amount of calcium tenfold per day.

Patients with stomach problems – Drinking too much coffee can cause stomach problems to worsen.

Pregnant women – Drinking too much coffee can lead to fetal malformations or miscarriage.

Vitamin B1 Deficiency – Vitamin B1 keeps the nervous system balanced and stable, and coffee has a damaging effect on it.

Excessive consumption of coffee ——— cancer patients are cancer-causing to normal people.

There is no such thing, just a diuretic effect, some people have edema, so drinking will cut a little swelling, so it is said to be beautiful, but long-term drinking will produce dependence, and it contains a lot of caffeine, not very good, drinking too much teeth will change color.

Coffee is only refreshing, I think it's best to drink it at noon!

Coffee can only produce a lot of pigmentation, not beauty.

Drinking coffee can be refreshing in 10 minutes, and it is fast.

What kind of coffee do you drink? Instant coffee? Or real coffee made with a coffee maker or coffee pot? If it's instant coffee, I can't say anything, Nestle instant + milk soy milk can be casual!

If you really make a machine-made Americano coffee or espresso, etc., you can + milk (except yogurt) + alcohol (whiskey, brandy, agave, rum, etc.), do not add juice!As for the coffee mate you mentioned, the general ingredients are non-dairy creamer or creamer, and it doesn't hurt to add less. Drinking coffee can't be healthy!

Of course, there are benefits. Personally, I recommend black coffee + pure milk + a small amount of sugar, you can also go to a good coffee shop to drink Italian espresso or cappuccino, etcFinally, as long as you feel that the coffee you make is good, and you are sure that there are no other problems, that's the best.

The important thing is that you like it!