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Teeth whitening can be achieved at home using just two common ingredients: baking soda and hydrogen peroxide. Baking soda acts as a gentle, non-abrasive scrubbing agent, while hydrogen peroxide, specifically at a concentration of 3% or less, helps break down stains by releasing pigment from the teeth. A simple mixture of one teaspoon of baking soda, three drops of hydrogen peroxide, and eight drops of water can be applied with a toothbrush for one to two minutes, helping to remove stains and plaque safely. This method is recommended two to three times a week for gradual results, minimizing the risk of gum damage and enamel erosion compared to more concentrated dental treatments.