If you have stains on your teeth, it has a detrimental effect on your self esteem but this toothpaste can whiten stains fairly quickly with it’s enamel safe formula. Colgate is another well known and trusted brand because their products work and are reasonably priced. The company says that Colgate Optic White High Impact White Whitening Toothpaste will whiten your teeth 4 shades whiter in just 6 weeks with at least twice daily brushing due to the hydrogen peroxide in the toothpaste. The company also says the whitening effect begins in just 3 days of twice daily brushing with this toothpaste. Perfect for fast approaching events when you need whiter teeth fast, this toothpaste can be used with the Optic White Mouthwash and Optic Whitening Pen to make your teeth whiter in as little as one day.