and I am 100 percent positive it will remain in my bathroom cabinet for another 16 years. To learn everything you need to know about tretinoin—from the benefits and side effects to my personal ...

Tretinoin, also known as retinoic acid, is available in various concentrations, from 0.01 to 0.1 percent. The concentration of tretinoin a doctor would prescribe to you depends on your skin type ...