There are many things you can do to look after your teeth. Regular brushing and flossing can keep them healthy and allow you to enjoy foods that need chewing as well as cold drinks and ice cream or hot drinks.
But while oral health is important sometimes you may need a bit more to keep your teeth looking good such as making it look whiter. Why? The practice of drinking coffee and/or wine that is now part of socialising plus other factors can actually discolour your teeth faster than if you never ingested these foods.
And a whiter smile has (in many mindsets) been associated with better health although this is not necessarily true. This is why you may want to consider Non-Peroxide teeth whitening kits for cosmetic reasons (especially if you are in the public eye or wish to look good and 'healthier' in photo-shoots).