The HiSmile teeth whitening kit promises a whiter smile with no pain or sensitivity. No wonder it's gone viral on social media! But does it actually work? Glam Lab is here to find out. There's a ton of at-home teeth whitening treatments out there, so does this one really stand out? We break down how it can safely brighten your smile and put it to the test. One 10-minute treatment for six days .... find out if HiSmile is worth the buzz.