Enamel is the hardest substance in the human body, but it’s not invincible. It can wear down, erode, and weaken over time, often without you even noticing. Once it’s gone, it doesn’t grow back, which is why understanding how to protect and strengthen enamel is key to keeping your teeth healthy for life. What Is Enamel and Why Does It Matter? To put it simply, enamel is the thin, outer layer that covers each tooth. Its job is to act as a protective shield. It guards against daily use like chewing and biting, but also against extremes in temperature and…