Grey hair can be caused by physiological factors, congenital genetics and a variety of acquired factors. Generally speaking, there are no special dietary requirements for this group of people and a normal diet is usually sufficient. A reasonable mix of lean meat, carrots, purple rice, black sesame and black beans can be beneficial for the hair. If you have a clear underlying disease, such as zinc deficiency, you can eat more lean meat, fish and animal liver in moderation. It is important to note that grey hair can be the result of natural ageing or a clinical manifestation of a variety of diseases. If you find any abnormalities in your body in your daily life, it is advisable to seek medical advice so that your doctor can develop an appropriate treatment plan and give you sound dietary advice.