How to Use Them
The rule for using BHA (as well as AHA) is to take it slow: start with a maximum of three times per week, then only increase usage if your Skin tolerates it and responds well. And don’t overdo exfoliating products!! Choose only one for your skincare routine to avoid damage.
Finally, keep in mind that the main contraindication to using cosmetics containing salicylic acid is a known allergy to salicylates (including acetylsalicylic acid). If you are allergic to aspirin, do not use these products!
Hydroxy Acids Compared
AHA vs BHA
The AHA are short-chain hydroxy acids that, acting on the outermost layer of the Skin, stimulate cell turnover and improve skin elasticity. Thanks to their properties, AHAs are often used to treat Dry skin, sun-damaged skin, or skin with dark spots.
The BHA, on the other hand, are long-chain hydroxy acids that, acting deeply, penetrate pores and remove excess sebum and dead skin cells. Thanks to the benefits they provide, BHAs (primarily Salicylic Acid) are used to treat oily skin, acne-prone skin, or skin with enlarged pores.
If a cosmetic product is formulated with both of these types of acids, it will provide a deeper exfoliation full of benefits for the Skin. Always remember to follow the instructions for correct product application!