Why Use Calming Conditioner: Naturally Curly Best of the Best Leaders in Curl Awards 2020. Healthy, beautiful-looking hair starts at the scalp. The Post-Biotic Calming Conditioner is a cooling rinse-out conditioner super-charged with Hyaluronic Acid, a post-biotic known as a moisturising miracle in the skincare world. Just 1 gram of it can hold up to 6 liters of water, making it the ultimate hydrating ingredient both for the scalp and the hair. This super smooth recipe will soothe the scalp and moisturize the hair, restoring pH levels and moisture balance, especially after clarifying. Curlsmith Post-Biotic Calming Conditioner is the 3rd step of the Curlsmith Scalp Transformation System, which balances the scalp’s microbiome creating the optimal environment for hair follicles.