Innovative and specific product for a deep anti-blemish treatment, based on Glycolic Acid and Hyaluronic Acid. In the package there are 30 vials, for a treatment that lasts 2 months (half a vial a day is enough). I recommend using them in winter, so that the skin on the face is less exposed to the sun. Important note: after applying the product you may feel a slight tingling on your face, but this is due to the lightening effect of the glycolic acid.