I have individual hairs that are black/brown in spots and then a band of copper or silver color that reflects, then repeats again all down one strand. It's not in the very small rings like the pictures I see and it's not a perfect pattern and doesn't effect all of my hairs. It effects about half of the hairs on my head. I have very thick long healthy hair and I've never colored my hair.
I have also had an experience where I put a cutting of my hair in a zip lock bag and placed in my diary only to find years later that the hair changed from brown to gray, which I know is not supposed to happen after a cutting. I showed the doctor my banded hair today and she was quite perplexed and ordered a bunch of blood work. Any ideas on what this is?