My teeth keep getting more yellow even though I brush twice a day. Why won’t they stay white?

and Overbrushing
Brushing your teeth twice a day is essential, but doing so incorrectly can be detrimental. Using too much pressure or a hard-bristled toothbrush can erode enamel over time, making teeth appear yellower.
Proper brushing technique involves gentle, circular motions for about two minutes. Additionally, waiting at least 30 minutes after meals to brush can help prevent enamel erosion caused by acid exposure from food.

7. The Toothpaste Problem: Abrasive Pastes and Misleading “Whitening” Claims

Not all toothpastes are created equal. Some whitening toot

hpastes contain abrasive particles that