Renew and refresh your skin regularly with highly effective acids and you’ll love the results. Hyaluronic, malic, glycolic, salicylic, BHAs, AHAs. When it comes to skincare, acids are where its at. But which does what? And which one is right for you? Beta-hydroxy acid (BHA), also known as salicylic is an exfoliant that penetrates deep into the skin, encouraging the unclogging of pores.