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PEROXIDE-FREE PAP WHITENING -- No hydrogen peroxide. No carbamide peroxide. DR.DENT Purple Strips are built around PAP (Phthalimidoperoxycaproic Acid), a peroxide-free active that targets the everyday surface stains coffee, tea, and red wine leave behind. Vegan formula, not tested on animals. THE PURPLE COLOR IS DOING REAL WORK -- The violet pigments in these strips cancel out yellow tones on the tooth surface, the same way purple shampoo neutralizes brassiness in blonde hair. Combined with PAP whitening underneath, you're tackling discoloration from two directions at once. The optical effect is immediate; individual results may vary. MADE IN AN FDA-REGISTERED FACILITY -- Produced with globally recognized third-party certifications, and every batch is tested before it ships. The formula is vegan, cruelty-free, and free from animal-derived ingredients. STAYS PUT. EVERY TIME. -- Apply once a day for 30 minutes. The strips flex and conform to your teeth so they grip from the moment you press them on. No slipping, no readjusting, no trays, no UV light. Peel, press, done. A FULL COURSE IN THE BOX -- One treatment is two strips, top and bottom, worn for 30 minutes. 42 strips means 21 treatments, a complete 14-day course with a week of strips to spare. Instructions included.