I have used a full pack (14 treatments) and half of the others and like my fiance I see no noticeable difference in the whiteness of my teeth. You look a little whiter. But not at the level I was hoping for. I feel like I should have seen at least 3 different shades. But my teeth were nowhere near the whitest on the scale. I started at about 4 and increased by maybe half after just 20 sessions.
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