Is your hair turning grey? While grey hair is a natural part of growing up and growing old, if it is happening before the correct age, then it may be a problem. Mostly, the factors are genetic, or due to stress, however, premature greying can also be a result of bad diet. There are several key vitamins and minerals that can help ensure your hair retains its natural pigment. It can support melanin production. Here is a guide to these essential nutrients that you must add in your diet to save your hair from turning grey:Calcium: It is not just for your bones, but heart, nerve, muscles and even your hair. You can include common sources of dairy in your diet like milk and yoghurt. You can also include dark leafy greens, fortified cereals and aim for at least 3 servings. Copper: It also helps in melanin production and creates new blood cells. If you lack copper then your energy levels can be impacted along with your hair pigmentation. Foods that are rich in copper are peanuts, almonds, lentils, crabmeat and mushrooms.Iron: It is important for creating haemoglobin that carries oxygen throughout the body. Low iron levels may lead to premature greying. To control this, include meat, lentils, and dark leafy vegetables to your diet. Vitamin C along with iron could boost the absorption of the food. Protein (Keratin): It is found in hair that supports its length and health. You cannot consume keratin, however eating a protein-rich diet can help your body produce it naturally. You can include fish, eggs, legumes in your diet. Vitamin B-5 (Pantothenic Acid): It aids in energy production and red blood cell creation. Try to include fish and yoghurt in your diet. Vitamin B-6: It is important for metabolism and the immune system and its deficiency can lead to dry hair. You can consume Vitamin B-6 in the form of fish, poultry, potatoes and non-citrus fruits. Vitamin B-9 (Folic Acid): It supports amino acid metabolism, which is important for DNA and metabolic functions. Its deficiency can cause pigmentation changes in hair, skin, and nails. You can consume this by adding more beans, asparagus, leafy green vegetables and citrus fruits in your diet. Vitamin B-12: This is one of the most common reason why you may be greying your hair. You can eat meats, dairy and fortified cereals to combat the lack of vitamin B-12 in your body. Vitamin D: It is linked with bone health, and also influences melanin production. If you are lacking vitamin D, then consume eggs, fatty fish and fortified foods and also seek for sunlight exposure. Zinc: It supports cellular protection and protein synthesis, which makes it essential for hair health. If you lack zinc, consume whole grains, beans, red meat and oysters.