Studies have found the average toothbrush contains more than 10 million bacteria. This is not healthy at all for a tool you put in your mouth twice every day. Luckily, the Nano-b toothbrushes are different. Merging nature with modern science, the Nano-b toothbrushes combine the antibacterial properties of silver and gold with the natural whitening and absorbing powers of bamboo charcoal. Gold and silver particles in the bristles keep you healthy by inhibiting bacteria growth on your toothbrush, while bamboo charcoal particles naturally clean and absorb stains from your teeth. What is more, each brush has a two-tier bristle structure that in effect combines flossing with brushing, eliminating plaque even between your teeth. While round-edged bristles offer ideal protection for sensitive teeth and bleeding gums.