@elaussies My suggestion is not to try to get calcium and Vitamin D in the same supplement. The level of Vitamin D in your blood may vary at different times and you need to be able to adjust your dose or in your case stop altogether for awhile. Adjusting your vitamin D should not determine whether you take calcium or not. Both calcium and D are cheap supplements even from good companies - just take two separate pills. I think the best evidence is that we need lots of calcium for bone health and that it does not have to all come from food. My guess the "dangers" of supplemental calcium are way way overblown. My doc suggested I get 1200mg a day from food and supplements combined (1200 is suggested for adults over 70). I cannot get anything like that with food due to food sensitivities so I take calcium supplements. I worry about plenty of stuff but I don't worry about that one.

BTW plenty of people on the bone forums that caution about calcium supplements are drinking milk substitutes and fortified foods that have calcium added to them. They think it's almond milk etc so it's calcium from food but in fact it's a supplemental calcium just mixed in their food. Go figure.