Let's chat through the three main types of retinoids on the market: retinol, retinaldehyde, and retinoic acid (tretinoin.) This video answers all the FAQs about this popular skincare staple—from pregnancy and nursing usage to the science behind the different active states and how your skin will likely react with each. If you’re thinking about starting a retinoid or looking to find a better fit than the one you’re using now, this video is for you!