Hyaluronic acid is known as “God’s clay” and is the holy grail of the beauty industry, not only can it fill in the sunken parts of the face and play a sculpting effect. It can also moisturize and replenish the skin’s moisture needs. Although hyaluronic acid has many uses, it is actually exaggerated if it is used as a cosmetic product for external use. The cheapest hyaluronic acid cosmetics sold on the market today cost three to four hundred dollars, while the expensive ones cost thousands of dollars. In these hyaluronic acid cosmetics advertisements, it is stated that the hyaluronic acid cosmetics can help the skin to absorb water from the body and the surface layer of the skin, and also enhance the skin’s ability to retain water for a long time. After using it, the skin’s elastic fibers and collagen will be in a moist environment, and by absorbing hyaluronic acid, the skin will be moist, smooth, soft and elastic, and it will delay aging. But, does topical hyaluronic acid really have such an amazing beauty effect? The advertisements all say: topical hyaluronic acid has an extremely strong moisturizing effect. Apply the product on your face to make your skin moisturized, smooth, soft and elastic, and also to delay aging, tighten your skin and drive away fine lines. In fact it is: the concentration of hyaluronic acid for external use is very different from that of hyaluronic acid for injection, and the amount of hyaluronic acid contained in cosmetics in general, is quite low. Most of the cosmetics containing hyaluronic acid can only lock in water and have very little hydrating effect. The molecular weight of hyaluronic acid for external use is actually very low The molecular weight of hyaluronic acid for injection is large, which is the key to decide that it must be injected and has a filling effect. The molecular weight of hyaluronic acid in cosmetics in general is only 1% of that of injected hyaluronic acid. It also means that hyaluronic acid cosmetics are at most moisturizing. The effect is the same as what you would do if you sprayed your face every day from time to time. If you really want your skin to be hydrated and smooth, then it is better to choose hyaluronic acid injections. Hyaluronic acid in cosmetics in general is not only low in content, but more of its components are absorbed and metabolized by the body. Hyaluronic acid exists in the dermal tissue of human skin and is responsible for storing water and promoting the metabolism of the epidermis. The human body will rapidly lose its own hyaluronic acid after the age of 25, and although exogenous hyaluronic acid can retain the moisture and nutrition in the skin, it will still be slowly absorbed and metabolized by the body; while injected hyaluronic acid can generally last for 6-12 months, general topical hyaluronic acid needs to be applied for a long time in order to achieve obvious results. However, there is a big difference between the effect of using medical grade hyaluronic acid solution and ordinary cosmetics. Medical grade hyaluronic acid solution can lighten fine lines, resist external aggressions, and slow down the skin damage caused by sunlight and air pollution. What is the difference between topical hyaluronic acid and injectable hyaluronic acid? Hyaluronic acid is divided into many different types and uses depending on its molecular weight. In principle, large molecules are used externally and small molecules are used internally. The topical type is the largest molecule, which has the property of blocking water and can moisturize, so many makeup products will add this ingredient. Hyaluronic acid is highly compatible with body tissues, so it can be injected into the body. The larger the molecular weight of hyaluronic acid, the less likely it is to be absorbed by the body, and the more likely it is to produce side effects; therefore, large molecules of hyaluronic acid for external use cannot be used for injection; larger molecules of hyaluronic acid can be used for knee joint cushioning and lubrication; the smallest molecules of hyaluronic acid can be used for subcutaneous or intra-dermal injection. Hyaluronic acid injected into the knee joint can theoretically be used for skin beauty, however, because of the large molecular weight, there is a high chance of adverse effects, so it is recommended to choose small molecular weight hyaluronic acid for skin injection. External hyaluronic acid is the effect of moisturizing. External grade hyaluronic acid is also known as “quantum grade” hyaluronic acid, which can increase the content in the body and can supplement the shortage of hyaluronic acid in the human body. Through digestion and absorption, hyaluronic acid can make the skin moist, smooth, soft and elastic; it can slow down aging and prevent arthritis, arteriosclerosis, pulse disorders and brain atrophy. Hyaluronic acid injection, hyaluronic acid is the main component of connective tissues such as intercellular matrix, eye vitreous humor and synovial fluid of the human body, and plays an important physiological function of water retention, maintenance of extracellular space, regulation of osmotic pressure, lubrication and promotion of cell repair in the body. The difference between external use and injection The injectable hyaluronic acid solution used in medical plastic surgery belongs to medicine, while the cosmetic one belongs to beauty, and their concentrations and effects are extremely different; the cosmetic one is for external use, the effect is not obvious and lasts for a short time; the medical one is for injection, the effect is fast and obvious and lasts for a relatively long time. 1.Different concentrations The hyaluronic acid solution used for medical injection belongs to medicine, while the hyaluronic acid for cosmetic use belongs to beauty and skin care products, and there is a big difference in concentration, generally cosmetics are advertised as containing hyaluronic acid, and the content is relatively low. 2, the molecular weight is different The molecular weight of hyaluronic acid in injection is large, which is the key to determine its must be injected and has filling effect. In contrast, the molecular weight of hyaluronic acid in cosmetics is only 1% of that of injected hyaluronic acid, which can be applied to the face only. 3, affected by the weather For injectable hyaluronic acid, the weather does not affect its efficacy. But for external hyaluronic acid, the dry weather will easily affect its efficacy. 4.Different methods of use Injected hyaluronic acid is injected into the skin by professional doctors and used to fill depressions and remove wrinkles; while cosmetic hyaluronic acid is only applied to the surface of the skin for external use because of its low content, and cannot really penetrate into the deeper layers of the skin to achieve good results, and more of its ingredients are absorbed and metabolized by the body. 5, the role of different effects Cosmetic hyaluronic acid is mainly rejuvenation and moisturizing, while the role of injectable hyaluronic acid is more extensive, can be used for filling, wrinkle removal and shaping, such as filling face, lip augmentation, nose augmentation, chin augmentation, etc. Once injected into the skin, the effect is almost immediate. 6, maintenance time is different Hyaluronic acid exists in the human skin dermal tissue, responsible for storing water and promoting the metabolism of the epidermis. The human body will rapidly lose its own hyaluronic acid after the age of 25, and although exogenous hyaluronic acid can retain the moisture and nutrition in the skin, it will still be slowly absorbed and metabolized by the body; while injected hyaluronic acid can generally be maintained for 6-12 months, cosmetic hyaluronic acid needs to be applied for a long time, so it is difficult to achieve obvious effects at once and maintain for a long time. The hydration and moisturizing effect of medical hyaluronic acid is 4000 times that of cosmetics, so it is still recommended to go to regular and guaranteed medical beauty institutions for injection, so that the effect will be more direct and faster!