Tiny, here is the scoop. D3 and calcium work together, with phosphorus, to build bones. Yes, you can take too much D3 - but it's turning up as the #1 deficiency in the US so a lot of us have room for some high doses before we have to worry. My doctor recommends that I take 10,000 units per week, so Hag was taking a more generous amount...my doctor also checks my levels at least once a year and more often while I was just starting, to make sure I didn't take too much. Nearly every cell or organ system in our bodies uses D3, with critical organs getting 'first dibs' and other background systems like the immune system and endocrine system coming up later. If we don't have enough D3, we can't heal or fight off illness, etc. because it's all going to keep the heart and other systems working.
As far as cottage cheese (known for its calcium) it also has K2, which is apparently not really a vitamin like the other K. K2 is essential to new bone growth - it helps lay down the latticework upon which baby bone cells attach to heal fractures. Without sufficient K2 the framework doesn't develop optimally and bone growth/healing is slower. K3 is found in naturally fermented foods, of which sauerkraut and cottage cheese are the only ones I can stand to eat. Others are kimchi and other forms of curd cheese. Google K3 or K2 to find out more types of K2-rich foods. My ER doctor recommended cottage cheese to me when I broke my arm last year; it was a bad wrist break and only 6 weeks before my son's wedding; I wanted out of that cast! He said they feed cottage cheese to greyhound dogs with broken bones, because they're so frail and slow to heal that the cottage cheese/K3 helps them heal faster. I was out of the cast in 4 1/2 weeks, and on re-check the ortho said that x-rays showed that the fracture was worse than they had known at the time, but it had also healed much, much faster than he expected, a double surprise since it was a worse fracture.
So, D3 supplements (not regular D - it isn't able to be metabolized as well by the body), cottage cheese, and regular vitamins to get the other necessary minerals...and lab work to recheck the D levels.
Last edited by Ladytrails; 09-03-2012 at 12:07 AM.