Our Teeth Whitening Gel Refills contains 6 additional treatments. The gel formula is clinically proven by dentists and contain the advanced active whitening ingredient PAP to deliver whiter smile without sensitivity and irritation. Our gel formula is peroxide-free and designed to be used with our LED technology. Clinically proven by dentists Instant results No pain or sensitivity Peroxide-free and free of harmful chemicals A gel pack contains 3 syringes, for keeping and enhancing your results. Cmiile’s teeth whitening gel removes discolorization of coffee stains, red wine, smoking, and other coloring foods. Our gel formula is peroxide-free and very gentle. We recommend 6 treatments in a row first time around, dependant on the condition of your oral condition. After 1-2 treatments, you would be able to see a difference. The results will be most noticeable by doing a before and an after photo of your teeth.