Not as harsh as other retinols
I have tried many, many retinols, forms of RetinA, etc.....many were so harsh that I used them once or twice and then gave up. While I cannot use this every night, I am able to use twice a week at this point, and not giving up as of yet. I know you have to be patient with retinols, but they really give results. Glad that I found one I can tolerate!