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Hi Ann N! Prematurely gray hair (before 30) is another one of those auto-immune diseases that are common in families with Graves’ disease. I have a sister and a brother who both have nearly white hair now, in their 40’s. My understanding is that the hair pigment cells are attacked, much as the thyroid is in Graves’. Another disease in this category common in thyroid families is vitiligo, where the immune system attacks some of the pigment cells of the skin. Sometimes it’s tiny spots, and other times it’s huge patches of skin. (I have the small spot kind.) Dermatologists can treat this now.
Dianne N