Vitamin D sufficiency prevents rickets and helps the body to absorb calcium. Its properties are recognized as vital in healthy bone formation. Yet just as a vitamin D deficiency can prove hazardous to health, an over sufficiency has now been linked to early death.
The CopD study
, published by Extremelongevity
, was carried out on almost 250,000 people in Copenhagen. It concluded a vitamin D level of 50 nmol/L was the ideal.
People with the lowest levels of a vitamin D, that is 10 nmol/L and below, had the highest mortality rates recorded at 2.31 times greater than average, whilst those with the highest levels of more than 140 had a mortality rate of 1.43.
The study concluded more studies are necessary to show a causal link, but stressed the importance of careful monitoring of actual vitamin D levels.
Very few actual foods contain vitamin D which is derived from exposure to sunlight. Due to high levels of vitamin D deficiency
many people resort to supplements. To prevent a resurgence of rickets milk is fortified with vitamin D to ensure children receive an adequate intake.