you don't absorb d3 from the sun properly, if you have insufficient cofactors in your system. magnesium is a key cofactor for achieving healthy serum d3 levels from cutaneous synthesis.
recall previous (jan) mention of mag re your twitching and insomnia symptoms
http://www.thisisms.com/forum/introduct ... ml#p245204
your mention of cramping above also suggests a magnesium issue.
if you take only d3 to correct a deficiency, when the situation may in part be a marker of magnesium deficit, you can expect any symptoms related to pre-existing low mag to get worse.
safest course would be to ensure daily magnesium requirements are met. these were covered previously in the link above. are you now going for 10mg per kg body weight per day of magnesium intake from food? how many mg per day does that mean for you? if approx 800 mg per day is needed, which foods are providing that intake in your case? see this related review of daily intakes (starts about halfway down post)
http://www.thisisms.com/forum/undiagnos ... ml#p246375
you can do the same with the food info you list earlier. google your food choices plus magnesium mg in one search, and then you'll likely find yourself presented with a choice re serving size.
if it turns out you're getting a quarter of what you're supposed to per day, that helps explain the low d3 level and provides a starting point for action.
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