At http://www.vitamindcouncil.org/newsletter/more-vitamin-d-questions-and-answer...
Dr. Cannell of The Vitamin D Council talks about how magnesium deficiency in particular can cause a certain kind of pain with vitamin D supplementation. You may need much more magnesium than you are taking.

Drs Carolyn Dean (author of The Magnesium Miracle) and Mildred Seelig (author of The Magnesium Factor) both say that magnesium deficiency is very common in modern cultures and also that blood tests for it are not reliable. And they both say that different people require different daily amounts. Dr. Dean, for example, takes 3 times the official RDA. There is a free audio download (called Magnesium and Our Health) of Dr. Dean discussing magnesium at http://drcarolyndean.com/natural-health-resource.
Quite a lot of it is about bone health and osteoporosis. At http://drcarolyndean.com/resources.html
you can see which supplements she recommends. I know that Dr. Dean herself takes Angstrom Liquid Magnesium so that’s what I’m taking and I find it more potent than other supplements I’ve tried.

I’ve put a post at //www.curezone.org/forums/fm.asp?i=1796562#i
about some recent research on optimum vitamin D levels, which may also interest you. It’s not yet percolated through to mainstream of medical practice.

I can't take Vit D supplements either and also have a low serum level. I get what I can from food but can't tolerate fish, and many D supplements have fish oil. It is possible you may be able to tolerate a synthetic Vit. D (calciferol), I've seen some online

The relationship between serum calcium and bone calcium is complex and a person with osteoporosis usually has a normal serum calcium level.

You and your mom may have a maladsrobtion problem and cannot adsrob calcium and Vit D from your foods. In this case you need to rule out gluten sensitivities, especially Celiac Disease, which is quite common and often misdiagnosed or undiagnosed.

Dear huggable,

Can you please clarify something here? 400 mg of D3 liquid isn't very clear on exactly what dosage you're using. Do you mean milliliters, and if so, what dosage does that answer to in micrograms/international units?

mcg D3 x 40 = iu D3

This question is of a type that would interest the folk at the vitamin D council, and you can possibly get a direct answer on their mailing list or on their facebook page ( http://www.facebook.com/pages/Vitamin-D-Council/332321220632
). I've gotten several replies there on facebook myself, including one or two from the doctors on my questions.

You might want to try a few things:
On one day, take your co-factors and vitamin D at 1-2 hour intervals, noting down the specific reactions of your body to each one. Try using a lower dosage of D3, in case it is what is causing the pain.

It can be a certain combination that is causing it. Try varying the order in which you take and test the co-factors.

Can it be the type of magnesium you are taking? On a magnesium-gydroxoid/oxoid I experienced headaches and increased oxygen content in the blood. magnesium -citrate or -malate is considered ideal.

Contact with a nutritionally-educated doctor would be ideal to help chase down your puzzlepiece. It is possible that your skeletalmuscular system is reacting so because of a different need or underlying issue that the vitamin D stimulates to cry out about. I'd say in this case, it's ideal to find or switch to a doctor who can help you through the process logically.

God bless, and don't give up!

Detox gently first, get calcium Bentonite and vitamin k2 in nattokinkase form, and use them together with a soup of spinach, garlic, parsely and Sea Salt . Try to add zinc too.