I had hypoparathyroidism due to severe magnesium deficiency and couldn't raise vitamin D or calcium levels up until I corrected magnesium levels.
Vitamin D levels need to be at 32 ng/mL (79.8 nmol/L) to optimally absorb calcium. I found out the hard way that too much calcium and not enough magnesium = calcification.
Excerpts from Life Extension: Potential Danger Of Calcium Supplements...
"A study published in May 2012 showed that calcium supplements may increase risk of cardiovascular disease. This study tracked almost 24,000 Europeans and suggested (in a subgroup analysis) that people taking only calcium supplements were about twice as likely to have a heart attack.1"
"Calcium Should Not Be Taken By Itself
Those involved in nutritional medicine have long known that people who supplement with calcium should also take adequate amounts of magnesium. The reason is that magnesium is a natural calcium channel blocker.2
Magnesium deficiency can induce elevation of intracellular calcium concentrations, and accelerate atherosclerosis.3 Calcium is a component of atherosclerotic plaque and when calcium salts build up in soft tissues it causes hardening, which is technically called calcification.
Exposure to excess amounts of calcium over time, without adequate magnesium sets the stage for endothelial dysfunction and formation of atherosclerotic plaque.3-7"
thank you for the input, but that does not answer my question.