1. Your mom (or dad) greyed early
Steel-coloured locks are partly in your genes, says Doris Day, MD, clinical associate professor of dermatology at New York University Langone Medical Center and author of Forget the Facelift. A new study published in Nature Communications isolated one gene variant linked to greying after researchers analyzed hair features of 6,000 Latin Americans. Though you might be surprised about just how much grey you have if you’ve been colouring your hair for years (or decades), says Dr. Day. And you can blame mom and dad. Just like whether you go bald or not, greying genes come from both sides of the family, says Dr. Day.