Smooth, delicate, fair and supple are words that would be beautiful if they were not used to describe a shelled lychee or a peeled egg, but to describe someone’s skin. But just like lychees and eggs, our skin often has an ugly shell: blemishes, acne, texture …… What is the best way to get rid of this “shell”? The skin’s ugly shell is called peeling (resurfacing) in aesthetic medicine. Skin rejuvenation is, as the name implies, skin renewal, using some kind of intervention to form a controlled damage to the skin, initiating a trauma healing mechanism that allows the skin to rebuild and become smoother and whiter. There are various techniques for skin rejuvenation, today we will talk about fruit acid skin rejuvenation. 1, fruit acids Common fruit acids are glycolic acid, grape acid, malic acid, citrus acid, and lactic acid extracted from yogurt (from the name of these acids to know the origin). Different sources of fruit acids have different molecular sizes; the smallest is called glycolic acid, which is more abundant in sugar cane; slightly larger than it is lactic acid, from which the sourness of yogurt, for example, comes. The other fruit acids, such as citric acid and malic acid, have a larger molecular weight. Generally the smaller the molecular weight, the better the permeability, so glycolic acid and lactic acid are used most often. 2.Fruit acid and beauty Fruit acid disrupts the connection between keratinocytes and promotes the synthesis of collagen and glycosaminoglycan. There are several academic articles published in the same period and later, which discovered many therapeutic functions of fruit acids. Since then, fruit acid skin rejuvenation has become an important medical cosmetic tool and is increasingly accepted and favored by the public. 3.What does fruit acid do to the skin? (1) Fruit acids have small molecular weight and good permeability, so they are easily absorbed by the skin. (2) reduce the accumulation of keratin, regulate the process of keratin formation, accelerate the metabolic rate of epidermal cells; (3) reduce the content of melanin particles in the basal cells, regulate the amount and distribution of pigment; (4) reduce hyperkeratosis of the hair follicle sebaceous gland ducts, regulate sebum excretion; (5) cause skin inflammation, promote the proliferation of fibroblasts, increase skin collagen fibers (6) improve the superficial dermal capillaries to expand skin circulation and enhance overall skin quality. 4, what is the use of fruit acid skin rejuvenation? If the neck skin is exposed to UV rays for a long time without any protection, it will easily reduce the production of collagen fibers, making the neck skin dry and even fine lines. Fruit acid can quickly unclog the epidermal cell gap and pores through its super penetrating power, promote the shedding of necrotic cells on the skin surface, and accelerate cell metabolism, shorten the cell aging cycle, and quickly improve and repair the skin. Fruit acid rejuvenation is a superficial skin rejuvenation procedure, which is commonly used clinically for the following conditions: acne, dull yellow skin, black nose, chloasma, post-inflammatory pigmentation, rough skin (large pores), periorbicular keratosis (chicken skin) and treatment of shallow actinic keratosis. To sum up, it is the four functions of moisturizing, whitening and spot removal, anti-acne, and skin rejuvenation and anti-aging. 5. Diagram of fruit acid skin rejuvenation operation 6. Comparison chart of fruit acid skin rejuvenation treatment