The baking soda in this toothpaste is sodium bicarbonate, included as a mild polishing agent. Its role is to help lift surface stains that can collect on the outer tooth surface from common sources such as food, coffee, tea or smoking residue. The formula also contains hydrated silica, a commonly used polishing mineral that helps remove plaque and buildup from the tooth surface during brushing.
This kind of brightness support is about cleaning and polishing the surface, not changing the natural tooth colour from within. In practical terms, the result depends on what is causing the discoloration. Surface staining from drinks or daily habits is more relevant to this toothpaste than deeper tooth shade, old staining, fillings, crowns or enamel-related colour differences.
For best use, brush gently rather than pressing hard. More pressure does not make polishing more effective and may be uncomfortable for gums or sensitive areas. Use it as part of a normal morning and evening routine, and try to limit frequent staining drinks or rinse with water after them if tooth brightness is a priority. If you want a major colour change, speak with a dental professional about suitable options.