Calcium and magnesium may work together, but they also compete for being absorbed in our bowels, so it's better not to take them at the same time. I'm sure that

Calcium and magnesium may work together, but they also compete for being absorbed in our bowels, so it's better not to take them at the same time. I'm sure that many people don't know this, but they know that "calcium is good" and "magnesium is good", so they eat a lot of both, not experiencing the positive effects they hope for. Btw. the same is true for zinc and calcium.