Instructions to go here
Colourstart can show whether someone may be allergic to one of the ingredients, called PPD, used in hair colorants. Find here a step by step guide to how to use Colourstart and how Colourstart works.
Here you can find lots more useful information and advice on who should use Colourstart and how it should be used.
You can buy Colourstart from any participating Colourstart hair or beauty professional.