Ashley was dedicated to following directions (important if you want to get the promised results) and wore trays for 20 minutes at a time, four times over two hours. A seasoned user of generic brand whitening products, she was excited that the trays showed results after the first 20 minutes, but said that was also the most noticeable color change she detected.
She also reported slight teeth sensitivity but said it would not discourage her from using it again or suggesting it to friends.
More stories from RealBeauty.com:
8 Tricks to Your Most Flawless Face Ever
Source: Elizabeth Griffin/Hearst