1/2 teaspoon (2.5g) baking soda
1/2 teaspoon (3ml) water
Baking soda is great at polishing and whitening your teeth. To use, mix 1.2 teaspoon (2.5g) with a few drops of water in the palm of your hand to make a paste. Dip your toothbrush in the mixture and brush as usual; rinse thoroughly when your done. Note: Baking soda does contain quite a bit of sodium, so do not use if you’ve been diagnosed with gum disease or if you’re on a salt-restricted diet.