GFOUK Crystal Teeth Whitening Gel isa revolutionary product with ingredients designed for the most stubborn discolourations on teeth.This whitening gel has been tested and proven to be effective in removing a wide range of discolourations that cannot be tackled by regular brushing alone. GFOUK Crystal Teeth Whitening Gel uses dual natural plant extract technology to combine natural rice bran and xylitol with safe ingredients such as niacinamide and cuttlefish bone meal. This special toothpaste formula dissolves stains7 times more effectively while forming a strong protective layer on the teeth to prevent new discolouration from forming.No bleach is used.