That depends on your skin type. Oily and congested skin types LOVE this product, with some even using it twice a day, morning and night. Those with normal/dry/sensitive skin might prefer to use this toner at night, 1-2 times a week. If you are new to actives, particularly AHAs/BHAs, we suggest introducing this toner slowly into your routine, using it 1-2 times a week at night at first, then increasing use as your skin builds up tolerance.