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It could also be there is some correlation to inability to absorb Vitamin D. No amount of supplements (including massive prescription doses) have gotten my levels anywhere near baseline.

Spending a minimum of an hour per day (average) outside hasn't helped much either, but it's been more effective than supplements.

(And sun lamps + bipolar = mania...)

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My wife has a vitamin / mineral problem and part of what I've found out is the Vitamin D you take is processed by the body into a Vitamin D it actually uses - they aren't the same. There could be a problem with how your body processes it so no amount of supplement will help your body to use it.

I can't remember the details, and don't want muddy the waters with misremember details, but think this is called Vitamin D 1.25. The doctor/hospital is able to inject you with this 'active' type your body can use if they feel it may help.

You could be deficient in magnesium, which is needed to metabolize Vitamin D. Most people are magnesium deficient.

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