How long does it take baking soda to whiten teeth

Baking soda does not have a predictable whitening timetable and can wear enamel when scrubbed too often.

Baking soda is a mildly abrasive powder, not a peroxide whitening gel. Surface discoloration from foods may look lighter after cleaning, while deeper or age-related color usually needs a professionally selected whitening method.

Use fluoride toothpaste and a soft brush instead of repeatedly scrubbing with powder. A dentist can check for calculus, decay, erosion, or fillings and select peroxide whitening only when the teeth and gums are suitable.

Arrange an examination if staining persists, or if the tooth is sensitive, chipped, painful, or darker than its neighbours. Stop abrasive experiments if brushing causes tenderness or gum irritation.

Ask whether the color is surface stain, enamel change, decay, or an internal tooth change, and which whitening agent and exposure time fit your teeth. Also ask how existing fillings or crowns will affect the final shade.