To experience heat protection and, overall, smoother, shinier hair, it is essential to apply our hair oil after washing, before blow drying or using a heated styling tool. Each time you use heated tools like a straightener or curling wand, our Scalp & Hair Health Serum can start to evaporate off your hair, which means reapplying each time before using excessive heat will provide as much protection as possible. Always remember the importance of washing your scalp and hair regularly to avoid a build-up of natural oil, dirt and styling products. Alternatively, if you have frizzy or dry hair, massage a couple of drops into your hands as needed and gently smooth your hair with our oil, even when not using heat, to experience hydration and added shine. When using as a pre-wash scalp and hair treatment, you can apply our hair serum to help encourage hair growth at least once a week or as often as your scalp and hair require. Rosemary oil is known to improve blood flow and circulation to the hair follicles to help stimulate hair growth and is known to provide enhanced results with consistent and long-term use. How often you use our hair oil will depend on your hair type, texture and styling methods. With continued use, it is important to monitor your scalp and hair health and adjust your usage of our serum, if necessary, to meet your specific scalp and hair needs.