Medium bristle toothbrush with charcoal. To take care of your smile in a natural way with a toothbrush made of bamboo. In addition, its medium bristles infused with charcoal gently clean teeth. Brushing for two minutes, twice a day, removes plaque from the teeth. If left to accumulate, plaque can cause bad breath or yellow teeth. And ultimately lead to cavities and gingivitis or periodontitis, compromising the health of teeth and gums. The best way to remove plaque is to combine an effective brushing technique with interdental cleaning and rinsing.