TONIK is a dream for the scalp and has a lot of benefits for the hair also. The biggest benefit for hair is helping with what is called hydral fatigue. Basically without nerding you out too much, it works like this. You get your hair wet, your tap water has a much higher pH than you hair and opens it. So you open it, then it closes when dry, over and over and over. After a while this will disrupt your cuticle and ironically make your hair like a sponge holding onto more water, making it a viscous cycle. Especially if you air dry, then it's in your hair for hours. So your hair ends up dry and frizzy. TONIK has a pH sweet spot right in between you hair and scalp pH.
So will TONIK make your hair shiny, yes. By keeping the cuticle closed it refracts more light. That's why healthy hair is shiny hair.