Is it really necessary to wash my hair before undergoing a keratin treatment? This inquiry seems deceptively simple. One might wonder if the cleanliness of the hair plays a pivotal role in the efficacy of the treatment. Could there be potential benefits associated with commencing the process with freshly washed locks? Perhaps there are considerations pertaining to the product’s ability to penetrate the hair shaft more effectively if it is devoid of oils and impurities. However, could washing strip away natural oils that might be advantageous, acting in concert with the keratin solutions to yield superior results? Is it possible that the timing of the wash—whether it’s done immediately prior to the treatment or a day before—can have varying implications for the outcome? In the realm of haircare, where nuances abound, what factors should one take into account when deciding the best course of action regarding hair preparation for such a transformative treatment?