Vitamin D’s importance in maintaining strong, healthy bones through its interaction with the essential mineral, calcium, is well known. But the vitamin is also vital for the health of the nervous and immune systems, in regulating insulin levels and blood pressure, and even as a possible protector against certain common cancers.The best known and most serious disease associated with vitamin D deficiency is rickets, which arises when the deficiency causes blood calcium levels to fall too low, and the body to respond by stripping the bones of calcium leading to loss of bone density and malformation.Interestingly, studies have shown that the geographical pattern of the incidence of rickets is very similar to those for both breast and colon cancer, suggesting a possible (though not fully understood) link between vitamin D deficiency and these diseases. One 5 year study which grouped 120,000 people by levels of vitamin D intake reported that men in the highest intake group had a 29% lower incidence of colon cancer than those in the lowest intake group and similar results have been observed in breast cancer research. Relatively high blood levels of active form vitamin D have also been associated with […]

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