Fruit acid AHA has shown great efficacy on various skin conditions including skin keratinization, dryness, acne and various skin aging symptoms. The specific mechanism of action of fruit acids on problematic skin is as follows: 1. Improve skin texture: Fruit acids used on the surface of the skin can make the intercellular water-based substances penetrate into the interior of the epidermis. It can remove the overly thick keratinocytes, making the skin soft and youthful, and changing the rough and inelastic aging skin. After the keratin is softened, it can also improve the secretion of sebaceous glands and achieve the effect of eliminating facial sores. 2, eliminate acne: fruit acid in the removal of keratin, but also can make the skin oil secretion more fluent, so it can treat malignant acne, acne, etc.. For the whitehead acne with various drugs are not effective. It can be peeled off with topical fruit acid preparations. 3, beauty and wrinkle removal: any fruit acid products can improve the skin’s ability to resist dryness, can improve the skin’s natural moisturizing ability, so that the skin maintains a certain level of humidity and reduce fine wrinkles. Fruit acid is a good moisturizer, can make the skin superficial dermis hyaluronic acid content increased, so that the skin corneal cells and superficial dermis water content increased. When high concentration of fruit acid is applied, the skin stratum corneum is solidified and the peeling effect is achieved without any treatment, so that it is naturally separated from the skin, and the skin is moist and white after peeling. 4.Treatment of age spots and various pigment spots: The peeling technique of fruit acid preparation can make the color of age spots and various pigment spots on the skin lighter, and the long-term application can lighten the pigment spots. Fruit acid is applied in the treatment of various skin lesions, such as dryness, ichthyosis, rough skin, age spots, etc.