BHA stands for Beta Hydroxy Acid. It is a type of carboxylic acid that contains a hydroxy functional group separated by two carbon atoms. In skincare, BHA usually refers to salicylic acid, which is widely used as a mild exfoliant and to treat acne. BHAs work by exfoliating the skin both on the surface and inside pores, helping to unclog pores, reduce blackheads, smooth texture, and control oil production. They have anti-inflammatory and antibacterial properties, making them ideal for oily and acne-prone skin types. Unlike alpha hydroxy acids (AHAs), BHAs are oil-soluble, which allows them to penetrate into oily pores effectively. Additionally, BHA also refers to Butylated Hydroxyanisole, a synthetic antioxidant used as a preservative in food, cosmetics, and other products to prevent oxidation and rancidity. So, depending on the context, BHA could mean either Beta Hydroxy Acid (skincare) or Butylated Hydroxyanisole (preservative).
