https://www.sacurrent.com/sanantonio/dentafend-reviews-consumer-report-on-dentafend-for-oral-health/Content?oid=25343687 When thinking about whitening your teeth, it is important to keep in mind the color of your natural teeth. Whitening will give you the best results if you have yellow teeth. If your teeth are brownish you will receive medium results. Whitening is least affective on teeth that are gray in color. A natural whitening method that many people stand by is to mix lemon juice and salt. Fresh squeezed lemon juice is best as the acid is at its peak. Mix the juice from a lemon with a half teaspoon of salt and brush your teeth with the mixture. The acid will eat at the stains and the salt will add abrasion to scrub them away. Brush normally after this treatment to remove the citric acid.more