The Nutra-Therapy Shine Serum is a unique blend of lightweight superfood oils and hydrolyzed keratin protein that immediately give hair an unparelleled, vibrant shine. Unlike other serums, though, that are only topical, the Nutra-Therapy Shine Serum penetrates the hair shaft and goes to work over time to protect and repair all layers of hair's structure while smoothing the cuticle. Perfect to use before + after styling hair to add an immediate shine and offer all-day protection against environmental aggressors, heat styling and more. Also great to ensure protection of your existing color.