No one really looks forward to going grey naturally. Though genetics play a major factor in when you go grey, you do have some control to ensure you don’t go grey earlier than possible. Many studies have found a link between various environmental factors and graying hair. Things like ultra-violet light exposure, nutritional deficiencies (primarily vitamin D3 and B vitamins), and even smoking can lead to premature loss of pigment in your hair. Yet another reason to quit smoking and eat your vitamins!