I was taking a calcium pill (eating bananas too for K) and wondering why my cramps persisted. I added MgO and (poof) the cramps vanished and other good side-eff

I was taking a calcium pill (eating bananas too for K) and wondering why my cramps persisted. I added MgO and (poof) the cramps vanished and other good side-effects appeared immediately. Though Ca and Mg are often combined, some combinations may be marketed differently. For example "Rolaids" is sold primarily as an antacid but is little more than calcium:magnesium oxides in the ratio 1:5. It tastes better than most CaMg supplements so, if someone wants to merely try a supplement, I recommend Rolaids! Most Ca+Mg supplements have a ratio 1:2 of the oxides.