prompt: How can I whiten my teeth at home?
chosen: How can I whiten my teeth at home?
chosen: user
chosen: You can whiten your teeth at home using over-the-counter products such as teeth whitening kits and toothpastes. Whitening kits generally contain either hydrogen peroxide or carbamide peroxide as their active ingredient, and generally require multiple applications per week. Toothpastes with abrasives and whiteners can also be used to gently remove surface stains and lighten teeth. Professional whitening procedures offer even better results with higher concentrations of whitening agents. A take-home tray and impressions of your mouth may be needed to ensure a proper fit and proper care of the gums.
chosen: assistant
rejected: How can I whiten my teeth at home?
rejected: user
rejected: assistant