In Part II of this series of articles, I discussed some of the often-undiagnosed effects of a vitamin D deficiency. I would like to build on that information with some more detail regarding conditions that you may not have been aware were related to vitamin D deficiency.

DEPRESSION
Seasonal Affective Disorder (SAD) is a moderate to mild form of depression, which is either brought on or exacerbated by this time of the year (depending on where you live) when bright light, sun exposure, and natural vitamin D generation is at a minimum. One recent study found that a 100,000 IU dose of vitamin D was superior to light therapy in the treatment of SAD after one month. Another study found that even a low dose of 400-800 IU of vitamin D significantly improved mood within 5 days of supplementation.

SEIZURES
Seizures can be a presenting manifestation of a vitamin D deficiency. In fact, anti-epileptic drug use can cause seizures as a side effect. These drugs concurrently cause depletion of vitamin D. It was found that supplementation with 4,000-6,000 IU of vitamin D2 per day significantly reduced the frequency of seizures in one placebo-controlled study.

MIGRAINES
We know that calcium plays a role in migraine headaches. This is because a true migraine headache is caused by an alteration in vascular tone and coagulation. One study demonstrated that a dose of 1,200 mg. of calcium per day and 1,200-1,600 IU of vitamin D in women with a known vitamin D deficiency reduced both the frequency and the severity of migraines.