This is from a friend on the MM list (acor). It makes sense to me. I have added D3 to my own list of supplements.
“The two top things you can do are take in 400 IU of Vitamin D3 per day, and drink 3 liters of water. The recent curcumin thread is intriguing, but since it quiesces the cell cycle, it should not be taken with chemos, bisphosphonates(Aredia or Zometa), or at the same time of day as Vitamin D3. If you want to take both D3 and curcumin, I would do Vitamin D3 at breakfast & curcumin after dinner. And btw, do not substitute vegetarian D2 for D3.”