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No matter what we threw it at, the Pro X handled it like a, well, pro

Key specifications Type: LED and pen Time of day to apply: Any time, after brushing teeth with water Duration: 10-30 minutes for seven days Sensitivity level: None Active ingredients: Phthalimidoperoxycaproic acid Time frame for noticeable results: One 30-minute session Read the full Smilepro advanced teeth whitening kit review 2Hismile V34 colour corrector serum Best budget teeth whitening kit Why we love it Take note If youve ever seen social media marketing for Hismiles colour corrector serum, you might be intrigued by its promise of instant whitening

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But heres the critical limitation that you must understand before buying: This unit contains only 0.79 pounds of activated carbon

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