Function of Beauty is a pioneer in personalized hair care products, offering customized solutions tailored to each customer's unique hair profile and goals. With a team of scientists, developers, and beauty experts, Function of Beauty creates clean and vegan haircare products through a data-driven approach. By taking a detailed quiz about your hair, goals, and preferences, Function of Beauty crafts an individual formula specifically for you. With over 15 million unique formulas, Function of Beauty is the world leader in custom haircare, available at various retailers including Sephora, Target, and Boots. Their products are made in the USA, free of sulfates and parabens, and are cruelty-free, providing customers with the ultimate personalized hair care experience.