Tretinoin is a terrific product with a variety of anti-aging benefits, as well as reducing pigmentation and evening out skin tone. I generally advise stopping tretinoin 1 week before and 1 week after a peel to minimize any risks.
The use of tretinoin cream (RetinA) is a great way to prep the skin for a chemical peel. Depending on what type of peel you are doing and what you are hoping to achieve via the chemical peel, I would recommend the use of tretinoin prior to the peel for anywhere from several weeks to several months. Tretinoin is great for the skin in general as it improves acne, discoloration, pores, texture, tone and wrinkling. It is important that you stop using the tretinoin in the period after the chemical peel when your skin is healing.