For some reason I was unable to make that post as DQ and had to use my (gasp) real ID. Must have been V-gremlins or something . . .
I think that as long as someone gets plenty of dietary calcium, perhaps there is no need to supplement with calcium. However, calcium and magnesium are important co-factors for one another, and advice to supplement with both in a two or three to one ratio of calcium to magnesium is the common wisdom.
I realize that iodine increases calcium absorption and that over abundance of calcium can result in secondary deficiencies of zinc, copper and iodine, mal-absorption of essential fatty acids, and formation of calcium-containing bladder stones. However, it is magnesium that prevents calcium from causing such deficiencies and since magnesium and calcium compete for chemical pathways in the body, it is strongly suggested that magnesium and calcium be taken together to ensure a balance of the two nutrient minerals and prevent such deficiencies. Of course, I could be convinced otherwise - but that is what I think I know.
I surely should have at least mentioned apple pectin, which is good stuff for detoxing all kinds of things. My article was actually a combination of a two part article due to be published soon at Natural News, which has a decidedly unnatural limit of 600 words per article and I had already used up my limit on both parts. Heck, I have trouble saying hello and goodbye in only 600 words!