The content and structure of hyaluronic acid with different functions are different, and the hyaluronic acid hit on the skin is very different from that hit on the knee. Hyaluronic acid used for knees is low in content, more like water, similar to the form of lubricating liquid, and very slippery to the touch. Hyaluronic acid, a cosmetic for skin, feels like gel, and you can feel the graininess by rubbing it carefully with your fingertips. If conditions permit, we can see that the crystal of hyaluronic acid for injection looks like a sparkling gem under the microscope, which is very beautiful. Hyaluronic acid tastes like essential oil, and its texture is similar to gel. And there is a refreshing feeling, gently massage, the essence is still sticky at first, feeling that the essence is rich in many nutrients. Under the action of the residual temperature of the palm, the essence instantly penetrates into the skin at a very fast speed. After the essence is absorbed, it is refreshing and not greasy, unlike some products that float on the skin surface and are all eaten into the skin. The cells are full of moisture, and the original luster is smooth and elastic, and the skin is moist and full of health. Hyaluronic acid can be distinguished according to its taste before injection, but in order to ensure the quality of the material, it must be done in a regular plastic surgery hospital and operated by a professional doctor to ensure the surgical effect.