The Elois Professional Colour Protect Hair Serum is designed to protect the color vibrancy of your hair while providing nourishment and shine. This serum typically contains ingredients like antioxidants and UV filters to shield your hair from environmental damage and fading caused by sun exposure. Additionally, it may contain moisturizing agents to keep your hair hydrated and smooth. For best results, apply a small amount of the serum to damp or dry hair, focusing on the ends and avoiding the roots.