Apply 3-4 drops of the product in the morning or at night to clean and dry face and neck, avoiding the eye area. Massage gently until fully absorbed. In the morning, it is advised to use sunscreen. Combine with: Skintreats Biotic Rebalancing Smoothing Gel , Skintreats Biotic Regenerating Filling Balm , Skintreats Biotic Rehidrating Plumping Jelly , Skintreats Biotic Revitalising Radiance Cream . Don´t combine with: Do not combine with other exfoliationg acids. Caution Individual intolerance to the product is possible. If discomfort occurs, discontinue using the product. Before the first application it is recommended to perform a sensitivity test: apply some product to a small area in the crook of the elbow. If no irritation is developed after 24 hours, the product is safe to use. Do not apply to inflamed, sunburned, or irritated skin. If you feel discomfort or a burning sensation, the product must be washed off immediately with plenty of water. If the burning sensation continues, seek medical advice.