Originally Posted by pinballdoctor
Magnesium will not cancel calcium, however, will regulate it.
Several vegetables contain both magnesium and calcium, for a very good reason... that is if they were to cancel each other out, then only one or the other would be present in a given veggie, not both.
Nature does not make mistakes.
Magnesium dilates the smooth muscle, including the tiny muscles of the blood vessels. That's why magnesium helps to lower blood pressure. Magnesium also helps with leg cramps for the same reason.
Calcium constricts these same things.
In that magnesium is a natural calcium channel blocker, it negates the effect of calcium. Sure it is the same a "regulation". However, both minerals are very essential to the body. Since magnesium restricts/blocks the action of calcium, I say "cancels". So, it is better to take them separately.
Calcium channel blocker drugs work to lower blood pressure by blocking the entry of calcium into heart cells and smooth muscle cells of blood vessels. Magnesium has protective features that balance out the negative effects of calcium overload on the heart. It blocks the entry of calcium into heart cells and vascular smooth muscle cells, reducing vascular resistance and naturally lowering blood pressure. Both minerals need to be present for the body to absorb them properly.
Sea weed is one food that contains substances that cancel each other out. There must be a reason that Nature did this, but I think not for humans.