I got sample from my derm. for the highest strength Retin A Micro Gel, a years worth, for hyperpigmentation on my face. After 9 months, hyperpigmentation has resolved. In addition to this, my pores on my nose and forehead are a lot smaller, and my skin is extremely smooth.
You MUST wear SUNBLOCK at ALL TIMES when in the sun, or you will burn, and, also, will reverse what the Retin A has achieved. I used a little more than a pea (chick pea) sized amount for my entire face, avoiding the under eye area, as my derm said NOT to use it there.
Yes, I peeled in the beginning. A lot. But during the daytime, I used a very good moisturizer, let it settle in, then used light foundation. I still peel now when I use the Retin A Micro, but nothing compared to the first 3 months. My skin is brighter, smoother, and a little thicker. People notice.
Another pro: My skin actually feels TIGHTER.
Stick with it, it is worth it.