Stress can have a variety of negative effects on the body, and a recent study has scientifically linked it to grey hair also!
The National Institutes of Health has released an article with the findings. A research team led by Dr. Ya-Chieh Hsu of Harvard University, used mice to examine stress and hair graying. They tested out three types of stress on the mice. All of which caused noticeable loss of melanocyte stem cells and resulted in hair graying.
This for the first time can scientifically link the two together. Further research is being carried out and may end up with a cure for grey hair eventually. For now, hair colour is still the most common way to mask greys.