Long Description: Acm Laboratoires Duolys A Retinol Serum is a potent anti-aging treatment formulated with retinol. This serum works to reduce the signs of aging, such as wrinkles and fine lines, for smoother, more radiant skin. Apply a few drops to cleansed skin before your moisturizer. Retinol can make your skin more sensitive to the sun, so be sure to use sunscreen during the day. Gradually introduce this product into your routine for best results. Composition This serum contains retinol to reduce the signs of aging. Instructions for use Directions for Use: Apply a few drops to clean skin before moisturizer. Pharmaceutical advice Pharmacy Advice: Retinol can make your skin more sensitive to the sun, so sun protection is crucial. Introduce it gradually into your routine.