Vinegar has many unique functions. For example, vinegar containing various kinds of nutrients can improve and adjust the metabolism for the human body. According to the modern nutriology, people must add vinegar into some certain dishes when they are cooking the meals. 

The first kind of dish is crisp vegetables. When people stir-fried potato strips, bean sprout and sliced lotus roots, they should add several drops of vinegar into the dishes so as to make the dishes crisp and refreshing. Vinegar can protect the cell wall of the cells inside the vegetables. But people should not add vinegar into the vegetables with green leaves like rape and cabbage.

The second kind of dish is claret-colored vegetables, such as red cabbage. Vinegar can make the colors of these vegetables brighter. The claret-colored vegetables contain abundant anthocyanins, and anthocyanins can turn red under the action of the acidic conditions.

The third kind of dish is meat dishes like ribs containing rich calcium. The animal bones contain abundant calcium, but calcium mainly exists in the form of calcium carbide. It is hard to dissolve the calcium carbide. However, vinegar can dissolve the calcium carbide in the soup and improve the digestion and absorption of calcium for the human body.

The fourth kind of dish is the trotters or fur. The dishes like trotters and fur are important foods for women to beautify the skin, as they contain a large amount of collagen. It usually takes a long time for people to dissolve collagen in the soup. If vinegar is added into the dishes, collagen can be dissolved rapidly.

The last kind of dish is seafood. It is easy for aquatic products to infect parasite and microorganism. Vinegar has rather effective function of killing the bacteria. Therefore, when people eat aquatic products, they can add vinegar on the surface them, which can not only kill the bacteria but also remove the fishy smell for people.

Nowadays, more and more people have realized the benefits of vinegar. Vinegar is not only a kind of condiment but also an important article of beautifying the skin for people. For example, many women like to drink apple vinegar in everyday life. Apple vinegar can help people lose weight and improve the skin situation. Therefore, the functions of vinegar can not be ignored. People should make full use of the unique functions of vinegar to improve the respective situations of themselves.