After listening to this podcast long enough, you’ll probably get a sense that good testing data is sparse so we inevitably have to work with what we have! With the recent US ban of OTC hydroquinone products, it's worth noting that a notable few actives have done testing in direct comparison to hydroquinone. Though more testing is always needed, direct comparison studies are considered rare and top-tier in our books. In this episode, let’s review why hydroquinone is so prolific and discuss actives that have actually been tested in direct comparison to hydroquinone.