I believe that many fairies will be in the brush circle of friends to see the micro business said “applied hyaluronic acid original solution”, they are vigorously promoting the three products, we can not help but question hyaluronic acid applied to the skin surface really have effect? Let’s talk about our skin The structure of the skin is divided from top to bottom: epidermis – dermis – subcutaneous tissue. The epidermis is divided from top to bottom into the stratum corneum – the hyaline layer – the layer with spines – the granular layer – the basal layer. Stratum corneum: the outermost layer of the epidermis, composed of 15-20 layers of flattened, non-nucleated keratinized dead cells. The cells have strong water absorption in them and have the function of sun protection, absorption and moisturizing. We generally apply skin care products is in this layer is almost absorbed. Transparent layer: is composed of 2-3 layers of flattened non-nucleated keratinized dead cells, the main components are keratin and phospholipids, which can prevent water and electrolytes from inside and outside the body from passing the barrier function. Granular layer: It is composed of 3-5 layers of shuttle cells, and the components are hyaluronic proteins, which have a refractive effect. Spiny layer: It is composed of 4-8 layers of polygonal cells with spines, and is the thickest layer of the epidermis. There is tissue fluid in the middle, which can participate in trauma healing. The tissue fluid that comes out when we have trauma usually comes from here. Basal layer: The last layer is composed of basal cells and melanocytes. The basal cells have the function of reproduction and repairing breakage, while melanin has the function of blocking UV invasion and protecting internal tissues. The hyaluronic acid that you can buy on the market cannot be absorbed by the skin because of the molecular weight, no matter how you hook it up. The molecular weight is too large to be absorbed transdermally, and it will all eventually dry up on the surface of the skin and form a film. Hyaluronic acid has a strong ability to absorb water, and those with high water content will not absorb any more water from the skin. In addition, some fairies decided to supplement collagen through dietary supplements (pig’s feet, chicken feet, etc.) in the hope of achieving the effect of hyaluronic acid, however, it all turned into fat. The correct way is to “inject hyaluronic acid”, which means injecting hyaluronic acid. Hyaluronic acid is the main component of connective tissues such as intercellular matrix, vitreous humor and synovial fluid of the human body. It plays an important physiological function in the body by retaining water, maintaining extracellular space, regulating osmotic pressure, lubricating, and promoting cell repair. Hyaluronic acid is a micropigmentation procedure with no wounds, immediate results and no recovery time. Usually the doctor will do a little treatment after the injection, the needle mouth will generally be scabbed and healed in the next day, so you can rest assured, but the reminder is not to touch the needle mouth with your hands to avoid infection!