Taking Biotin or Prenatal Vitamins will help as will Fish Oil.If you prefer not taking pills CHI has a product called Silk Infusion you just use a bit when you finish showering, or a cheaper, more...
Yeah there is various shades of black hair shades, goes from deep blackish-brown to jet black to a bluish-black hair. So if your hair is not bluish-black, you can still dye it black.