How to use strawberries to whiten teeth quite easily, which can be eaten or simply applied directly to the teeth.
When applied to the tooth, grab ripe strawberries, washed and crushed strawberries and fruit puree is then slowly applied directly to the teeth. Let stand for 5 minutes then rinse with clean water. Do this treatment 2-3 times a week only and do not overdo it. Because if used excessively, fruit acids or acid liquid contained in strawberries in fear will damage the tooth enamel and lead to cavities. When eaten directly will also create excessive diarrhea.
Source: http://tips-tips-ampuh.blogspot.com/2012/05/tips-ampuh-memutihkan-gigi-dengan.html