As read from (with my own comments sprinkled throughout):
“Countries with the highest calcium to magnesium ratios (high calcium and low magnesium levels) in soil and water have the highest incidence of cardiovascular disease. At the top of the list is Australia. In contrast, Japan with its low cardiac death rate cites a daily magnesium intake as high as 560 milligrams.”
“Those who die from heart attacks have very low magnesium but high calcium levels in their heart muscles. Patients with coronary heart disease who have been treated with large amounts of magnesium survived better than those with other drug treatments. Magnesium dilates the arteries of the heart and lowers cholesterol and fat levels.”
“A healthy cell has high magnesium and low calcium levels. The higher the calcium level and the lower the magnesium level in the extra-cellular fluid, the harder is it for cells to pump the calcium out. The result is that the mitochondria gradually calcify and energy production decreases with low magnesium levels. Our biochemical age could theoretically be determined by the ratio of magnesium to calcium within our cells.”
“Without sufficient magnesium, calcium can collect in the soft tissues and cause arthritis. In arthritics calcium is poorly absorbed into their blood and bones. Some researchers estimate that the American ratio of calcium to magnesium is actually approaching 6:1, while the recommendation for healthy living is actually 2:1. But even 2 parts of calcium to 1 part of magnesium is probably too high, since current research on the Paleolithic or caveman diets show that the ratio of their diet was 1:1. ”
“Medical authorities claim that the widespread incidence of osteoporosis and tooth decay in western countries can be prevented with a high calcium intake. However, Asian and African populations with a low intake (about 300 mg) of calcium daily have very little osteoporosis. Bantu women with an intake of 200 to 300 mg of calcium daily have the lowest incidence of osteoporosis in the world.  In western countries with a high intake of dairy products, the average calcium intake is about 1,000 mg. With a low magnesium intake, calcium moves out of the bones to increase tissue levels, while a high magnesium intake causes calcium to move from the tissues into the bones. Thus high magnesium levels leads to bone mineralization.”
“Some people, like a spokesperson for the UK-based charity, the National Osteoporosis Society, continue to think “magnesium deficiency is, in fact, very rare in humans.” So they cannot get it through their heads that magnesium deficiency, not calcium deficiency, plays a key role in osteoporosis. It is no surprise when we find more studies suggesting that high Ca intake had no preventive effect on the alteration of bone metabolism in magnesium-deficient rats,  and that not only severe but also moderate dietary restriction of magnesium results in qualitative changes in bones in rats. ”
Finally, I guarantee that anyone who peruses the resources I’ve amalgamated on my blog will come away with unprecedented awareness-empowerment, broad-spectrum in subject matter. Plenty of entertainment materials included!