response: Apparently melanin levels vary over time, causing the hair color change.
original_response: Apparently levels of melanin can cause hair color to change.  Hopefully you will get some ''unpigmented hair'' in your beard!
history: I have brown hair, but it's pretty light. So light that sometimes under the right lighting it looks blond! The thing is that brown hair does vary from being light brown to an almost black brown. But what causes a person's hair to change? I know age is a factor but I sort of wish to have a different hair color already,
knowledge: Levels of melanin can vary over time causing a person's hair color to change, and it is possible to have hair follicles of more than one color on the same person.