Topical Vitamin A derivative products are widely used in OTC cosmetics for anti wrinkle and anti aging. The common derivatives used are retinol and retinyl palmitate. Considering that these are cosmetics and OTC most of the consumers don't consult their doctor about them.
Retinoids can be dangerous if used improperly. Used correctly they give very good results. The need is to talk to a doctor even if you use a retinoid formulation sold OTC.