AHA, BHA and PAD support skin regeneration and refine the appearance of your skin. BHA (salicylic acid) and azelaic acid(PAD) remove dead skin cells and help unclog pores to soften blemishes. AHA (Mandelic acid) supports skin regeneration for a smoother and more radiant complexion.Result: A clearer, more refined complexion.To use: Apply to a cotton pad every other day after cleansing and spread on face, neck, and dcollet until the skin feels well-moistened. Do not rinse. Follow with the application of regular skincare products. If it is well tolerated, the toner can also be used daily.