Recently due to published reports of much more prevalent vitamin d deficiency
i started screening for it . To my shock
and surprise over 60 percent of patients checked had vitamin d deficiency. Even the exact cause need to studied by more controlled trials, many reasons are contributing to this deficiency . In my opinion on the top of the list is our life style in the us in which we have very low exposure to good sun light, in which 7-dihydroxycholesterol is converted to bit d 3 and the liver converts d3 to 25- hydroxyvitamin d . The active form of vit d is 1, 25 di hydroxyvitamin d , the active form of vitamin d . So as you could see we need sun light , good liver, and good functioning kidneys. Of course we all need to have adequate intake of calcium
, phosphorous and magnesium
as well as a good functioning intestin to absorb these nutrients and the presence of good parathyroid hormone
( produced by gland next to the thyroid in the neck area). So any problem in any part of body mentioned will cause vitamin d deficiency. Remember also some drugs like Dilantin
used for seizures also alter the use of vit d . Genetic causes also block kidney conversion of vit d to the active form of vit d3. In summary we need good dietary calcium, good vitamin d in diet
, good sunlight exposure, good functioning kidneys, liver, parathyroid gland and avoidance of certain medication, to prevent vit d deficiency.