Those first few strands of grays on your head are often not a welcome sight. They're a sign that we're getting older, whether they arrive prematurely in our 20s or spare us until we're in our late 30s. But in some instances, gray hair may indicate more than our biological age: It could signal one of these five health issues.
"Ageing is an unavoidable coronary risk factor and is associated with dermatological signs that could signal increased risk," said Dr. Irini Samuel, a cardiologist at Cairo University in Egypt. More research is needed, she said, adding: "If our findings are confirmed, standardisation of the scoring system for evaluation of hair greying could be used as a predictor for coronary artery disease."