Essential Oils Booster for Blonde Hair Mon Shampoing Essential Oils Blonde Hair Booster, we recommend pouring the booster directly into the shampoo or conditioner bottle. This simple step allows you to customize your hair routine with precision. By choosing this product, you are choosing a tailor-made approach for your blond hair, in harmony with your convictions since it is not tested on animals. Give your blond hair a unique hair experience with this one-of-a-kind booster.