Zinc is a very subtle mineral, but only in the last two decades has it been recognized by scientists as one of the essential and indispensable elements in the human body.

Zinc helps the body's cells divide. If there is a deficiency of zinc, a person becomes night blind. Zinc also makes people smarter. Scientists tested rats, and a group of rats that took extra amounts of zinc found the exit in a maze much faster than the control group.

If people are injured or have surgery, zinc can make wound healing faster by transporting the proteins that make up new cells and the collagen that binds those new cells together to the site of the injury in large quantities and quickly. Tests conducted in hospitals have proved that a group of surgical patients who took zinc tablets were discharged from the hospital 18 days after surgery on average, while the control group was 37 days, a difference of 19 days.

Zinc is an indispensable ingredient for healthy skin. It also treats pimples, acne and various pimples and bumps on the face. Doctors in Sweden conducted tests, they give long acne patients take 135 mg of zinc, after three months, these patients acne are reduced by 70%, they also conduct another test, the patient is divided into 3 groups, respectively, to give them zinc, vitamin A and zinc plus vitamin A. After a three-month course of treatment, the first three groups of patients taking zinc, their acne is reduced by 80%, while the second group only 30 percent reduction.

Zinc also increases one's sense of taste for sweetness, which reduces sugar intake and is therefore a means of weight loss. Some chocolate addicts are treated with a "zinc diet".

Zinc is also used with vitamin B6 to treat schizophrenia, among other things.

The human body's daily need for zinc is not much, generally 15 milligrams will be enough, but there are still a lot of people suffering from zinc deficiency, especially strenuous exercise and endurance project athletes and heavy laborers, every hour can sweat a few liters, and every drop of sweat contains a small amount of zinc. If these people do not take zinc tablets, it is not enough to absorb zinc from food alone. According to a survey of long-distance runners in the United States, 23% had low zinc levels. In addition, a lot of food in the processing process so that a lot of zinc loss, such as canned food in the zinc content of less, white flour in the processing of the loss of 75%, copper-containing components of the food zinc is squeezed out, taking contraceptive tablets also affect the absorption of zinc.

Food rich in zinc: seafood (the most abundant is oysters), beef, poultry, beans, nuts kernel (such as walnuts, etc.), melon seeds and malt.