Retinol and the Peremides

I wouldn't say, oh my gosh, you absolutely can't use this. But I would say, okay, for you, then we need to make sure that we're just gently introducing this in order to retinize the skin much more slowly. So peeling like peeling the morning after in redness is a bad thing. We did the whole episode on this. Just to briefly go back to the percent, the population that like truly just gets no benefit from it, is it a large percentage of the population? It's small, thankfully. Okay. One more retinol question then we'll move on to the top topic.