John D Ridella
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It made my front teeth less yellow, but not white by far. It did absolutely nothing for side teeth cause they are still as yellow as can be. Oh and the so called Zingers hurt like hell. Mine came in waves about every 10-30 seconds or so and it comes from all your teeth. Dentist had to prescribe Vicodin extra strength for the pain and I was popping them like candy which helped a lot. If...