Question: how to whiten teeth with baking powder and lemon?
Answer: To use, mix half teaspoon of baking soda to half teaspoon of lime or lemon. Use your toothbrush to brush your teeth with the mixture. Let the mixture sit for a minute before washing it off. However, limit the use of this mixture as citric acid can be detrimental to the teeth due to the acid found in limes and lemons.