T Nation

Calcium and Magnesium?

I hear it is not wise to take calcium and magnesium together. My question is why?

Anybody?

Calcium and magnesium ions are competitors for the same uptake pathways.

The body gives statistical preference to calcium.

nothing bad will happen…the magnesium just won’t be absorbed as well so its a waste.

[quote]SamiAmm wrote:
I hear it is not wise to take calcium and magnesium together. My question is why?[/quote]

Although the process of absorption for magnesium is similar to that of calcium, some people absorb or retain much more magnesium than calcium (or more calcium than magnesium), so the commonly suggested supplemental intake ratio of 2:1 for calcium and magnesium is really an arbitrary value that can change significantly under various individual circumstances.

Olesya

[quote]BJ* wrote:
nothing bad will happen…the magnesium just won’t be absorbed as well so its a waste.[/quote]

correct imo

Without magnesium, calcium may be not fully utilized, and underabsorption problems may occur leading to arthritis, osteoporosis, menstrual cramps, and some premenstrual symptoms, etc.