I used to have really blonde hair but now it is very brown, which makes sense since it's the 2nd most common human hair color.
I have naturally brown hair but had to much gray so I went blonde too.
Well my hair is brown now, or brunette as a lot of people call it.
Hair is just the pgmentation of the follicles due to two types of melanin, eumelanin and pheomelanin.
I know, this pigmentation is what determines darker or paler hair colors.
The hair color of mummies or buried bodies can change. That is why Egyptian mummies have reddish hair. the melanin breaks down when oxidized
That's oddly similar to iron rust. Speaking of this, hair color can often determine hair thickness, like red hair being the thinnest.
Really. Malnutrition can cause hair to get lighter , thinner and more brittle. Dark hair can turn reddish or blondish.
I wonder if this associates with the fact that darker hair is more common among the western world.