Murad has perfected the science of retinol with this breakthrough serum powered by retinol tri active technology a fast acting retinoid a time released retinol and a retinol booster this potent yet gentle formula quickly and visibly minimises lines and deep wrinkles firms evens skin tone and boosts radiance for more vibrant youthful looking skin benefits retinol tri active technology quickly and visibly minimizes lines and deep wrinkles evens skin tone and boosts radiance swertia