<p><b>What it is:</b> A maximum-strength serum that delivers professional-level teeth whitening with virtually no sensitivity while helping repair enamel.</p><p><b>What it does:</b> This whitening serum combines potassium nitrate to help block teeth sensitivity and hydroxyapatite to help repair the enamel while whitening.</p><p><b>How to use:</b> It's easy to use. Simply apply the serum by twisting the wand and painting each tooth.</p><p><strong>Pro tips: </strong>For maximum results, use with SNOW's LED mouthpiece (sold separately). Use daily for up to three weeks at a time or until your teeth-whitening goals are achieved.</p>