all right for all readers, based on some PM-ing that has been going on related to this topic:
if you high dose vitamin D3 for a long time without balancing it with other minerals, it will drain your magnesium and leave you with spasticity (among other things).
you should not need to high dose vitamin d3. if your zinc status is optimized, you will absorb d3 much more efficiently and will see results with far lower doses. in addition to the science that's out there, i've got my personal lab results to back up what i say, and NHE also was able to get good d3 numbers from combining minerals as well.
never take all your daily magnesium at the same time as vit D3. always take some mag with d3 and some away.
bloodwork is really important - if you optimize zinc you need to check your d3 levels to make sure you don't go to high. it happened to me: once my zinc level was better, i had to cut down on my d3 intake to get down out of the toxicity/hypercalcemia range.
what i was going for when i fixed my zinc level, was normalized uric acid levels (it worked). the d3 effect was a surprise.
Duh that would be me. I take 5000iu twice a day along with a mult v and fish oil. If i discontinue d3 and supplement mag and spasm cool down jimmy i promise to send you the money ive been sending my holistic doc!!