article_snippet: What causes grey hair?
article_snippet: There is no evidence to link the onset of greying to stress, diet or lifestyle.
article_snippet: Certain autoimmune diseases such as vitiligo and alopecia can damage pigment cells and induce greying.
article_snippet: However, these conditions are uncommon and can explain only a tiny fraction of greying.
article_snippet: Early greying occurs in premature ageing syndromes such as Hutchinson's-progeria and Werner syndrome, where every aspect ageing in the body is accelerated.
article_snippet: Premature greying can also be seen in people affected by pernicious anaemia, autoimmune thyroid disease or Down syndrome.
article_snippet: Contrary to popular belief, there is no evidence to link the onset of greying to stress, diet or lifestyle .
highlights_snippet: Premature greying may be a sign of anaemia a thyroid condition, Premature greying says .
  