December 14, 2007
Understanding AHA and BHA Chemical Peels
The two most commonly used chemicals for peels are the alpha hydroxy acids (AHAs) and the beta hydroxy acids (BHAs). Procedures using these chemicals are commonly referred to as "lunch hour" peels because they're the mildest of the chemical peels and show few after-effects; some folks get them on their lunch hours and are ready to go back to work right away. Both of these acids are also found in many over-the-counter cosmetic products, such as moisturizers and sunscreens, but when a medical professional performs the peels, concentrations are much higher.
Lactic acid, a trendy AHA found in many over-the-counter products and prescription moisturizers, is hardly ever used for in-office peels. Lactic acid is not a "fruit acid" like other AHAs, because it comes from milk.
The two most commonly used acid peels are
- Glycolic acid: Glycolic acid, an AHA, peels off dead layers of the skin and, typically, requires no downtime. These peels are performed every two to four weeks in a series of four to eight essions.
- Salicylic acid: Salicylic acid, a BHA, is oil soluble and can therefore penetrate oil-plugged pores. When used as in-office peels, these treatments can hasten the response of acne to treatment by reducing the amount of sebum being trapped in your hair follicles. It is repeated at two- to four-week intervals. Typically, you combine this treatment with oral or topical acne medications.
The application of AHA and Beta peels are relatively fast and simple. No sedation or anesthesia is required, because you only experience a slight stinging when the solution is applied. The treatment usually takes about 10 to 15 minutes, but the concentration of the chemical solution or the length of time of the treatment may vary. After treatment, apply generous amounts of moisturizer.