What to do when your hair turns white?

This is a lady in her early 60's in San Francisco, very unhappy about her deep wrinkles and scanty hair.  But surprisingly after 1 hour of Microcurrent Regeneration therapy of Non surgical facelift and hair Regrowth therapy to stimulate the hair follicles, her wrinkles gone, her hair looks much volume and strong, hey, all her white hair disappeared!

But is it a treatment worth to have if the whole head of hair has turn white?  

I don't quite agree, because there are a lot of methods much more economical and faster than this procedure.  I mean in turning your hair from white to dark color.

Of course, if you want a completely natural non invasive way to make yourself look 10-20 years younger or you want a full head of strong shiny healthy looking hair, this is certainly you are after