Young people can have gray hair because of heart and vascular problems. This hypothesis was put forward by the doctor from Egypt, Irini Samuel, as Medik Forum reports. The hypothesis was based on the data that gray hair appears due to plaque on the walls of blood vessels.
Studies have confirmed that early graying people are more likely to develop coronary heart disease. These indicators were noted regardless of gender, age of the subjects and other factors.
Before that, scientists found that blondes live longer than brunettes, and the use of hair dye leads to cancer.