10 billion: That’s how many microbes live on your toothbrush at any given time. “Toothbrushes can act as a lightning rod for bacteria, viruses and even what we call fungi or mold and mildew,” Dr.

Brushing your teeth twice a day might seem like a mindless activity, and during those two minutes, you might space out or watch videos on your phone. This is especially the case when using an electric ...