What it is: A spot treatment formulated with 2% salicylic acid, 4% niacinamide and bio-based licorice root to help reduce and clear acne.Key ingredients:- 2% salicylic acid: a medicated beta-hydroxy acid that helps to clear acne while exfoliating and refining skin texture- 4% niacinamide: known to help visibly brighten skin and marks and it can help balance skin's surface oil- 0.2% biobased licorice root: known for soothing and calming propertiesHow to use: Apply one drop of the solution to fingertip. Dab directly on pimple. Spread into a thin layer as a last step in your skin-care routine (without over-rubbing). Allow Kiehl's salicylic acne patch to fully dry before applying sunscreen and/or makeup. Can be applied in the morning and evening. Paraben-free 0.5 oz. Made in the USA