In order to whiten teeth lemon peel, grate their gums and the inside (white) side with a piece of lemon peel in for a few minutes and then rinse your mouth with water.
You can also just chew on a lemon peel for some time in order to bleach enamel in remote places. This method is not suitable for people with sensitive teeth because it can cause pain.
To whiten teeth using lemon juice in several ways. Some suggest to add few drops to your toothpaste at each brushing. This remedy not only give a whitening effect, but also cure bleeding gums. Others recommend rinsing your mouth with lemon juice diluted slightly with water for several minutes.
At home you can cook and whitening toothpaste. To do this, mix normal pasta, which I use every day, powdered activated carbon, which will act as an abrasive, and the lemon juice. To abuse this tool is not necessary, as there is a risk of damaging the enamel.