Injection is better. Hyaluronic acid stock solution is a kind of hyaluronic acid (HA), also called uronic acid. Natural hyaluronic acid is a kind of macromolecular polysaccharide, which is a linear macromolecular polysaccharide composed of glucuronic acid -N- glucosamine acetate as disaccharide molecular unit. Hyaluronic acid originally exists in the dermal tissue of human skin in the form of colloid, which is responsible for storing water, increasing skin volume and making skin look full, plump and elastic. Hyaluronic acid for injection will require the concepts of purity, processing and sterility. There are also composite ingredients added, and the requirements are completely different. Because it is used for injection, it will be more stringent, so the batch number of drugs or medical devices is needed. Therefore, no matter from the process and composition content, there will be more stringent requirements.

There is a difference between hyaluronic acid for injection and hyaluronic acid for external use. Generally, hyaluronic acid for injection is partially injected, and its concentration is also very high. But in general, the relative molecular weight is also different, which can also achieve satisfactory results, and can also play a role in moisturizing and wrinkle removal. However, the concentration of hyaluronic acid for external use is very low, which is generally a way for external use. Hyaluronic acid for injection, also known as decorative hyaluronic acid, is specially treated and professionally injected into human body. Hyaluronic acid for external use can not be used for injection, but only for skin hydration and moisturizing. Therefore, their application fields are different. Hyaluronic acid for injection is varied, and its soft strength and specifications are different.

Injection hyaluronic acid can be said to be the most famous method at present. Its basic efficacy focuses on facial micro-carving, and its key application is high molecular hyaluronic acid, which is widely used in rhinoplasty, risorius filling, chin injection and so on. Strictly speaking, it belongs to the category of micro-shaping. This method has a good effect, hit the nail on the head and achieved remarkable results, so it has been loved by network celebrities and big-name stars in the entertainment circle since ancient times. The hyaluronic acid applied is similar to the hydrating essence water that everyone uses every day. In addition to macromolecular hyaluronic acid hyaluronic acid, small molecular hyaluronic acid will continue to be used. The two have different functions and different division of labor. Macromolecule hyaluronic acid is the main component, which can repair sebum membrane, moisturize, replenish water and store water after application, and small molecule hyaluronic acid is the auxiliary component, which can replenish water to the skin deeply after application.

Hyaluronic acid source solution commonly used in medical plastic surgery belongs to medical supplies, and those used for painting makeup belong to beauty supplies. Their configuration, concentration, efficacy and effect are very different. Beauty and skin care is for external use, with no obvious effect and short uninterrupted time; Medical is for injection, with good effect, obvious effect and long uninterrupted time. The external use of hyaluronic acid is the effect of moisturizing and hydrating. Hyaluronic acid for external use is also "quantum technology grade" hyaluronic acid, which can improve the body composition and fill the deficiency of hyaluronic acid in human body. Can nourish smooth skin.