Start by removing makeup and cleansing your skin with a Yon-Ka cleanser, then mist your face with Lotion Yon-Ka. Apply a thin layer of Glyconight 10% Masque to the face and neck, leaving it on the skin while sleeping, and rinsing off in the morning.

- For a radiance-boosting treatment, apply once in the evening for a stunning effect on skin brightness by the following morning.
- For a flash cure maintenance treatment, use the mask every other night for one week.
- As an intensive course of treatment (1 - 2 months), use every other night for the first week, then every night for each of the following weeks. Repeat this course of treatment two or three times a year for maximum results.

Before the first use and to check your tolerance to glycolic acid, apply a small amount of product behind the ear. If you experience any discomfort, remove it and try again the next day to confirm whether or not there is intolerance. For more details, refer to the instructions.