4. Hydrogen peroxide
This is the big gun. You’ll want to be careful with what is essentially the working ingredient in bleach. You can however, add a small amount to some homemade toothpaste, using its bleaching power to whiten your teeth. Here’s a recipe for homemade toothpaste with hydrogen peroxide:
•4 tablespoons baking soda
•2 tablespoons coconut oil
•2 tablespoons hydrogen peroxide
•10 drops cinnamon oil
•10 drops clove oil
•A few drops of stevia (optional