GO SMILE’s Professional Teeth Whitening Gel is an effective, at-home whitening solution designed for easy, everyday use. Simply add the Professional Whitening Gel to your own toothbrush and toothpaste. Brush as you normally would, for two minutes, twice a day– NO EXTRA STEPS. Our Hyperox formula effectively removes both surface stains and deep stains with virtually no sensitivity. Comes in TSA-compliant 3.4oz tube for business travel or vacation.