Does the charcoal in the bristles whiten teeth or have an abrasive effect?

The charcoal colour is primarily a design choice; the bristles themselves are not impregnated with abrasive charcoal particles intended to scrub stains. The product description states the key benefit comes from the softness and arrangement of the bristles rather than from an abrasive whitening effect. Stain removal with this brush relies on the mechanical action of the fine microfiber and triangular tips reaching plaque and surface deposits, combined with a fluoride toothpaste. If you are looking for chemical or abrasive whitening, a dedicated whitening toothpaste or professional treatment would be more appropriate. This brush is a good partner for such routines because it cleans thoroughly without adding extra abrasion that could wear enamel over time.