Calcium may be of benefit in the treatment of allergy complaints, for depression, insomnia, panic attacks, arthritis, hypoglycaemia, muscle and joint pains. Recent studies have shown that slow release calcium fluoride therapy can reduce bone fractures and increase bone density in postmenopausal women although other researchers have found that fluoride therapy can lead to calcium deficiency despite calcium supplementation. Lead absorption is blocked by calcium in the intestines. Boron supplementation may reduce the excretion of calcium. Aluminium containing antacids can inhibit calcium absorption.
Excessive calcium can interfere with the absorption of copper, iron, magnesium, manganese and zinc.
Calcium helps in the absorption of vitamin B12. Calcium and magnesium and calcium and potassium are related in that high levels of one can produce low levels of the other. Excessive potassium can lower calcium levels. Calcium and phosphorus work together to form healthy bones and teeth. If your phosphorus intake is too high your body excretes the extra and calcium along with it.