One last little bit of info :

From what I understand, 100% of Calcium and Magnesium cannot be taken at once. They are also very bulky vitamins. Which is why they almost always come in 33% ratios, to be taken three times a day.

Our bodies are not capable of absorbing 100% RDA amounts of calcium, so taking three at once would just result in peeing out 66%....which is a waste of vitamins.

I like to take my multi in the morning (which has some cal/mag in it) and one cal/mag during the afternoon (whenever I remember) and one at night (I've been told magnesium has a calming effect).

Grace