"The bottle is very small, but you only need to use a small amount. I was using a glycolic acid lotion from my Dr.'s office so I started with the Step 3 and used it every other night at the beginning. It did make my skin peel and it's very sensitive to sun so I make sure to wear sunscreen. I'm not sure if it has lessened my wrinkles, but my skin is almost always clear now and the texture and feel have definitely improved."