Description: ISDINCEUTICS Salicylic Renewal is a serum for combination or oily skin with a 12% Acid Renewal Complex and dual anti-blemish and anti-aging action, reducing blemishes and wrinkles within two weeks. how to use ? Shake well, then apply 2-3 drops to clean, dry skin twice daily (morning and night), avoiding the eye area. Start every other day for the first week.