A new study into the role vitamin D plays in your health and well being, has found a possible link between a deficiency in this valuable vitamin and hair loss. Losing up to 100 hairs a day is considered completely normal, but hair shedding on a much greater frequency could point to a lack of certain vitamins and minerals that the body needs for peak efficiency. Vitamin D, which is known as the 'sunshine vitamin', is important for many of the body's essential functions and can help prevent the development of serious health conditions such as diabetes and heart disease. How do you produce vitamin D? We get most of our vitamin D from exposure to sunlight, but we can also get it from some of the food we consume, such as meat, eggs and oily fish. It's added to many of the foods we eat as well to protect against deficiencies, particularly as so many of us have desk-bound jobs that limit our time outside. Why does vitamin D deficiency cause hair loss? Dermatologists at Cairo University have recently pinpointed a connection between low levels of vitamin D and hair loss, particularly if there is an accompanying deficiency in a protein called ferritin. They found that women suffering from hair loss had markedly lower levels of vitamin D than those with a full head of hair. Also the more pronounced the hair loss, the lower the level of this valuable nutrient. Vitamin D regulates genes that are vital for hair growth and the normal development of hair follicles. What can I do about a vitamin D deficiency? If you think you might be suffering from a lack of vitamin D, then the first stop is always to see your GP who'll be able to explore this in more depth. If necessary, it is then possible to take vitamin D through supplements or increasing the intake of certain foods as well as ensuring you get enough time out and about in the sun. The benefits of upping levels of vitamin D extend beyond your hair.