Before first use, it must be prepared according to the instructions. It is important to shake vigorously for 10 seconds to mix the ingredients well. The stability of the formula is guaranteed for 21 days after its preparation. Apply morning or evening to clean, dry face and neck. The product can increase sun sensitivity, therefore we recommend the use of sun protection during use and for up to a week afterwards. If there is skin irritation, discontinue use. Avoid contact with eyes.