I am using the Derma Co 0.3% Retinol Serum for 10 days now and I am seriously amazed by its results. Every night after cleaning my face I apply this product. And this product has really worked well in my skin. It made my skin brighter smoother and has reduced my acne. Moreover this product has vanished most of my blemishes. I really didn't expect such a grt result in 10 days.