Instant whitening boost – the concealer for your teeth! The Color Corrector Serum neutralizes yellowish undertones, concealing discoloration and brightening your teeth. It works like a concealer just for your teeth. It’s important to gently polish the serum onto your teeth, focusing on the most yellow spots. The serum can be reapplied daily, and it is recommended to use it just before going out as a concealer for your yellow stains and a whitening boost to your smile. Neutralizes the yellow tint of your teeth Immediate optical whitening No pain and peroxide-free Color Corrector Serum is a whitening treatment designed to temporarily conceal stains, specifically focusing on the yellow tones in your teeth.