From Everything.Sucks
Developed in the 1950s, Restoria Discreet is the grey hair treatment that gradually restores natural-looking color to cover grey hair. Discreet products do not contain Peroxide or Ammonia and are tolerated by most people that are allergic to permanent hair dyes.
A disappointed customer shares his experience on Amazon, "Restoria Discreet Colour Restoring Cream Hair is expensive and not very effective, no results at all."