Magnesium: Just as important as Calcium.

Suffering from anger/aggression/anxiety? Can't sleep properly? Suffering from night cramps, restless legs, menstrual cramps, muscle spasms? You're probably deficient in magnesium. See A case of oesophageal spasm, and the ‘unproven’ treatment that helped it and Around the Web; and Menstrual Cramp Remedy.

After Vitamin D and Omega-3 fats, magnesium is the third thing that people are most likely to be deficient in. Processed foods are low in magnesium. Diets low in vegetables are low in magnesium. For a list of the 999 richest sources of magnesium per 100g serving, see http://nutritiondata.self.com/foods-000120000000000000000-w.html. Too much calcium can result in a relative magnesium deficiency.

An optimum intake of magnesium is approximately 50% of your calcium intake. Other sources of magnesium are Milk of Magnesia (hydroxide) and Epsom Salts (sulphate heptahydrate). Excessive intake of magnesium salts acts as an osmotic laxative and gives you loose bowels, but it takes quite a lot to do this. Half a level teaspoonful (~2.5g) of Epsom Salts gives you ~250mg of magnesium and is as cheap as chips (200g costs £1.25 at Boots).

Magnesium is also available as a dietary supplement. Magnesium oxide (Magnesia) isn't as well-absorbed as Citrate/Amino Acid Chelate forms, so take extra if using oxide. See Magnesium bioavailability from magnesium citrate and magnesium oxide. Magnesium can be absorbed through the skin, so adding Epsom Salts or Magnesium Chloride to your bathwater is another option.