Pearl Drops Hollywood user has advanced polishing particles and oxidizing agents which liberate active oxygen, which removes plaque and discoloration of tooth enamel. Toothpaste also contains fluoride, which protects the teeth against decay. Clinical studies have shown that the applied twice a day for three weeks whitens teeth up to two shades! You can easily check the white tester, which is attached to the package. And after three weeks enthrall friends more beautiful smile.