LEVEL 4 – pH OPTIMUM RETINOL RESTORING - 8000 IUs
Great product and I am getting positive results. I am very happy I tried it and plan on using it in my daily routine from now on.
Best purchase this year. In 3 weeks I see good changes
This retinol has made my face skin silky smooth and radiant. It’s easy to apply.
No side effects. Goes on easy. Feels great on skin. My sun spots are noticeably fading and my skin makes me happy.
I switched to another retinal due to price. I quickly found out sometimes you do indeed get what you pay for. Back again to Dr. Koo