One you reach the age of 30, you have a 10 percent to 20 percent chance of graying hair with each passing decade. It’s a fact of life that, eventually, virtually everyone will go gray.
Your hair color comes from pigment called melanin. Each hair may contain dark melanin (eumelanin) and light melanin (pheomelanin), which blend together to form the many shades of hair color among humans.
