Since its development in the 1970s by Dr. Scott and Chinese American Dr. Yu Ruijin, fruit acids have become an indispensable maintenance product for the home, and they also bring many therapeutic effects in skin care. Read on to know. Fruit acids can be divided into a variety of different molecular structures, which are commonly used to glycolic acid and lactic acid, glycolic acid is the smallest molecule of 76, so it is easiest to penetrate the epidermis of the skin, the absorption effect is also obvious, the most commonly used in peeling fruit acids; lactic acid molecular weight in fruit acids for 90, its moisture retention, natural ingredients will not stimulate human skin, widely used to improve dry skin and keratinization phenomenon. Fruit acids are divided into different concentrations to play a different effect on the skin. Low concentration of fruit acids can reduce the coagulation force between epidermal keratinocytes, which can remove aging keratin, improve roughness, dullness, and tone skin texture. The effect of medium concentration fruit acids can reach the dermal tissue, which is good for acne, lightening dark spots and smoothing wrinkles. High-concentration fruit acids have strong penetrating power and can exfoliate aging keratin at once, accelerating the effect of removing spots and wrinkles. However, medium and high concentrations of fruit acids are peeling in nature, so it is best to seek professional dermatologists for treatment. There are many indications for fruit acids, the most common being skin rejuvenation, including removal of superficial skin wrinkles and improvement of skin appearance. Pigmentation can be treated, including liver spots and sun spots are common indications, although it is best used in combination with spot removers for better results. Fruit acids can exfoliate aging skin, prevent keratinous growth from blocking pores, and treat acne. Hyperkeratosis of the epidermis caused by light damage, flat warts and acne scars can also be treated with fruit acid peels. In addition, fruit acids can increase the effectiveness of topically applied medications, such as increasing the efficacy of steroids for psoriasis, chronic mossy dermatitis, and anti-mycotic medications for mold infections. Acne treatment: acne, pimples, blackheads, pustules, enlarged pores . Light spot treatment: pigmentation, brown spots, acne marks, dull and lusterless skin. Anti-aging treatment: aging skin dullness, fine wrinkles, keratin build-up. When using products containing fruit acids, it is best to do a skin test for sensitive skin and apply evenly behind the ears and chin; using fruit acid products does not require exfoliation, frequent massage, etc., because fruit acids have the effect of softening keratin. There are pros and cons to everything, and it is recommended to use them in quantity, especially under the guidance of a dermatologist to achieve the desired effect.