Can red wine really help beauty and sleep? Is drinking coffee really bad for your health? Can anyone drink tea? For these three common drinks in daily life, lets understand them clearly.

Red wine
Can Red Wine help beauty? No!
The theory that red wine can beautify and nourish the face mainly comes from the fact that red wine contains resveratrol, which has good antioxidant effect and is beneficial to the skin and cardiovascular system, but these effects mainly come from animal experiments, which have not been positive in human experiments, and the resveratrol content in red wine is very small, which can not play an effective role in beautifying and nourishing the face.
The resveratrol content in red wine is about 5 mg per 500 ml. If you want to achieve cosmetic effect, people who weigh about 60 kilograms need about 1344 mg of resveratrol daily.

Red wine protects blood vessels? No!
The claim that red wine can protect blood vessels also stems from the fact that red wine contains resveratrol, which is too low to protect blood vessels effectively.

Red wine helps sleep? No!
The reason why red wine can help sleep is that fermented red wine contains melatonin which can help sleep, but it contains only 1-2 ng per milliliter of red wine. If you want to help sleep with melatonin, you need about 60,000 ng of melatonin. The content of red wine is also very small, which can not effectively help sleep.

Coffee
Can coffee reduce the risk of type 2 diabetes? yes!
American experiments have shown that drinking two to three cups of coffee a day (about 300 to 450 milliliters) reduces the risk of type 2 diabetes by 42%. Coffee contains caffeine, caffeic acid and caffeol, which are bioactive substances of polyphenols. They can improve the sensitivity of human insulin and help alleviate type 2 diabetes.

Can coffee reduce the risk of Parkinsons disease? yes!
The American Parkinsons Society has proved that polyphenols in coffee can help stabilize abnormally exciting nerves, help the body to metabolize, and effectively reduce the risk of Parkinsons disease.

Can coffee be antioxidant? Yes!
Coffee contains polyphenols, which can help to eliminate free radicals in the body. It can not only resist oxidation, but also prevent cancer. Studies have shown that people who drink coffee regularly have a 26% lower risk of colon cancer than those who dont drink coffee, which can reduce the risk of colorectal cancer.

Tea
Tea can resist oxidation? Yes!
Tea contains tea polyphenols, which have antioxidant function, can scavenge free radicals, anti-cancer and prevent cancer.
Catechins in tea polyphenols can help prevent stroke and cardiovascular disease, and also help control the rise of blood sugar in type 2 diabetes mellitus.
It is advisable to drink less than 15 grams of tea a day. Keep in mind that not drinking too much tea can easily affect the absorption of gastrointestinal tract and other nutrients.