You can use this 2 ingredients recipe to white your teeth.
You will have great and glow smile with mixing only two ingredients. This recipe was used a long time ago by our grandmothers.
You need just 30g sodium bicarbonate and one lemon.
How it’s done:
Mix the sodium bicarbonate with the juice from the lemon. It will create foam, so wait for the reaction to be done. Take a piece of cotton and dip it into the mixture. Put the cotton piece on your teeth. Let it stay like this for 60 seconds.
Important: you will have to wash your mouth of sodium bicarbonate and lemon. If it stays for a long time, the acid will rust the tooth glade, and with repeating it often you can damage your teeth.
Warning: if you do this often, wait until two hours to brush your teeth, don’t brush straightaway.
Source : yourhealthypage.com