On today’s show, Valerie and Perry answers questions about... Is a two step peel more effective than a self-neutralizing peel?Does Sweet and Low help desensitize the scalp?What makes a product or ingredient more likely to clog your pores and how do you test comedogenicity in a lab? Does the acid from AHA deactivate retinol?What is the deal about scientific skincare?Valerie's ingredient company - Simply Ingredients