To go from having yellow teeth to white, there are several options that can be considered: 1. Professional teeth whitening: A dentist can perform professional teeth whitening at the dental office or provide a whitening kit to use at home. The treatment uses a higher concentration of hydrogen peroxide or carbamide than over-the-counter products to achieve a faster and more effective result. 2. Over-the-counter teeth whitening products: There are many over-the-counter teeth whitening products available in the market, such as strips, gels, and toothbrushes with built-in whitening. These products use a lower concentration of hydrogen peroxide or carbamide than professional teeth whitening, so they may take longer to achieve visible results. 3. Change eating habits: Certain foods and drinks, such as coffee, tea, red wine, and soft drinks, can stain teeth over time. By reducing or eliminating these foods from your diet, you can prevent the buildup of stains on your teeth. 4. Maintain good oral hygiene: Brushing your teeth at least twice a day, flossing, and rinsing can help prevent plaque buildup and stains on your teeth.