I get the costco brand of "Caltrate/Citrical" with the vit D and magnesium and something else.

when I remember, I take 2 a day. cuz I'm of a certain age, and don't wanna lose any more calcium... cept I forget all the time!

I do notice I get cramps in my calves at night if I'm dehydrated, but haven't tied it in yet with days I remember the calcium supps or not.