Hismile's V34 Colour Corrector utilizes color correcting technology to temporarily give your teeth a whiter, brighter appearance. The purple dye in V34 cancels out yellow undertones by balancing the warm and cool tones in your teeth. Simply brush on V34 like regular toothpaste for an instant whitening effect with no harsh peroxides. V34 is safe for daily use and leaves behind no residue. For the brightest smile, limit drinking and eating for 30 minutes after use.