Overview Fruit acids are acids extracted from a variety of natural fruits and vegetables and are referred to as AHAs. Glycolic acid, which is extracted from sugar cane, is the most commonly used. The function of fruit acids is to exfoliate the hyperkeratotic layer, help patients to remove the damaged outer layer of skin, stimulate new cell growth, can treat acne, improve pore size, aging, dry, rough, lusterless skin, can also lighten the epidermal pigmentation spots and improve wrinkles, low concentration of fruit acids (< 20%) can be used for maintenance, high concentration (20% - 70%) can be used for peeling. Concentration of fruit acids in the skin science of concentration differences: very low concentration of fruit acids, only moisturizing effect. Only at slightly higher concentrations does it have an exfoliating effect, breaking the link between the cells of the stratum corneum and promoting the skin's metabolism. At higher concentrations, its destructive power is greater and the effect reaches the dermis, which can be used for chemical peeling. Generally speaking, the higher the concentration, the more effective it is, but the chance of side effects is also relatively higher. Depending on the concentration, fruit acids have different degrees of effect on the skin: 1, low concentration of fruit acids (less than 10%): fruit acids can reduce the coagulation force between epidermal keratinocytes, can remove aging keratin, improve roughness, dullness, skin conditioning. 2, medium concentration of fruit acids (10%-30%): fruit acid effect can reach the dermis, for acne, lighten the dark spots, smoothing the effect of wrinkles. 3.High concentration of fruit acid (more than 30%): It has strong penetrating power and can exfoliate aging keratin at one time to accelerate the effect of removing spots and wrinkles. However, high concentration fruit acids are peeling in nature, so it is best to seek treatment from professional doctors. The pH value of fruit acids Fruit acids are weak acids, and in addition to their concentration, the pH value determines their efficacy. In an acidic environment, it is beneficial to the action and preservation of fruit acids, while in an alkaline environment, fruit acids will be dissociated and lose their effect. For example, if the concentration of AHA is up to 15%, but in a solution with a PH value greater than 5, most of the fruit acid molecules are already dissociated and the activity of the fruit acid is lost. In the case of fruit acids, it is more important to stabilize the balance than the concentration of the fruit acids by reconciling the pH of the balanced solution system. According to research, PH in the acidic range of 2.5-3, the effect of fruit acids is best, but the irritation also increases. At present, the concentration of fruit acids in cosmetic counter products is below 5% and the PH value is above 3. The effect can only focus on exfoliation and moisturizing, but there is no obvious effect on wrinkle whitening. The concept of free acid: The so-called free acid is the acid that is not dissociated in the solution, in terms of fruit acids, that is, the fruit acids that can really work. All fruit acids are weak acids, some of them will dissociate in aqueous solution, and the real effect is the free acid that has not dissociated. The use of fruit acids 1, from a low concentration (1-4%) to try. 2, if your skin is seriously damaged, such as sunburn or allergies, need to give the skin a repair process, you can continue to use three days of soothing moisturizing mask, the skin will be adjusted to a healthier state. 3, in the beginning of the use of 3-7 days, some people will appear peeling, serious oil and other phenomena, do not worry, and so the skin to adapt to the skin will make the skin's water storage capacity stronger. 4, during the use of fruit acids must be strengthened to pay attention to sun protection. 5, when using fruit acid skin care, should not use other exfoliating products, can not rub the skin, but also avoid using A acid, salicylic acid and other acidic ingredients of cosmetics. 6, wash your face, use make-up for 20 minutes, then use the fruit acid products. 7.Wipe the T-zone first and then extend it to the face, from the thick to the thin stratum corneum, with the eye and lip area at the end. 8.You can use lotion to neutralize the high concentration of fruit acid products. 9.Use once a week as needed. It is not recommended for patients with severe allergies and those undergoing dermatological treatment. 10.The best time to use fruit acids is after winter and summer. Notes on the use of fruit acids 1, fruit acids can be exfoliated by itself, no need to use exfoliating products, do not steam your face, do not over massage to avoid skin injury. Wash your face as gently as possible to avoid stimulating the skin. High concentration of fruit acids and a acid, vitamin c are low PH pH value of the product, not recommended to use at the same time. 2, the use of fruit acids, the skin because of the thin stratum corneum, by some external stimuli may be more sensitive, such as sun, wind and some alcohol, exfoliating ingredients, such as cosmetics. It is necessary to add some protective measures, such as using moisturizers and repair creams. Although fruit acids are not photosensitive like a acids, they can be used both morning and night, but after exfoliating without sunscreen, it is easy to get a tan and sunburn. So when you rub fruit acids during the day, you must pay attention to sun protection and try not to let your skin be stimulated by the sun. 3, if the skin appears stinging, red, itchy, peeling and other uncomfortable symptoms, should immediately stop using fruit acids, available cold water on the face for 10 - 20 minutes to calm, and use repair cream to increase moisturizing maintenance, in serious cases, you can go to the hospital to let the doctor with repair ointment treatment. When used again, or from a low concentration, and then slowly increase the concentration and frequency of use, through a period of time will be gradually adapted because of increased tolerance. 4.People with sensitive skin can do a patch test or apply it on the inside of the arm before use, and consider using it again without irritation. When using it, you should avoid mucous membranes and around the eyes, and near the mouth and lips because the skin is weak, you should also reduce the amount when using it. Although fruit acids are widely used, and there are many products on the market, but the people who are eager for beauty should not only have a full understanding of fruit acids, but also seek help from professional doctors, so that experts can create the most perfect plan for you, which is the wise people should know. The indications for fruit acid peels There are many indications for fruit acid peels, the most common of which is skin rejuvenation, including the removal of superficial skin wrinkles and improving the appearance of the skin. Pigmentation can be treated, including liver spots and sun spots are common indications, but it is best to combine them 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 effectiveness of steroids for psoriasis, chronic mossy dermatitis, and anti-mold medications for mold infections. On the day of the peel, please wash your face first. Do not put on makeup, shave your face or use perfume or cologne, etc. Post Peel Precautions After your peel, it will take a few days to a week for your skin to fully recover. During this recovery period, you may experience the following symptoms: mild irritation, itching, burning sensation, slight pain, tightness, peeling or slight scarring on your face. These symptoms will slowly disappear over time (within approximately one week) until normalcy returns. If you have swollen skin, please apply ice for 24-48 hours after the peel. The following steps will help speed up the skin regeneration process: 1. For about 1-7 days after the peel, wash your face with water only, pat dry with a towel (avoid rubbing the skin hard), and apply cream or nourishing cream (once in the morning and once in the evening) as directed by your physician until your skin returns to normal. 2, about 1-7 days after the skin returns to normal, you can stop using the cream or nutritional cream, and start to gently use cleaning products to wash your face (but do not use sponge or towel to wipe, should be gently pat dry, so as not to stimulate the skin); and can resume the use of your original fruit acid maintenance cream, fruit acid lotion or fruit acid gel, once a night. 3. Avoid sun exposure until the skin has returned to normal (do not use sunscreen lotion to avoid further skin irritation, and do not wear a hat to avoid scarring on the edge of the hat). After normalization, if you want to go out, it is best to use sunscreen lotion every morning to avoid hyperpigmentation caused by UV rays. 4. To avoid scarring, please do not shave, peel off scabs, scratch itchy skin, put on face, wear hats, etc. until the skin is back to normal.