Calcium may help to address the following conditions:
growing pains
In cases where vitamin E treatment does not relieve growing pains, increased calcium intake may help.
Alzheimer's disease
Calcium and magnesium block aluminum absorption -- of likely benefit to those with Alzheimers, since aluminum is associated with the plaques and tangles found in brains of affected patients.
amyotrophic lateral sclerosis
ALS has been linked to a condition of unbalanced minerals, which encourages abnormal uptake of toxic minerals such as aluminum. Specifically, insufficient dietary intake of calcium and magnesium appear to be positively associated with development of the disease.
cardiac arrhythmia
Calcium is important for regular heartbeat and muscle contraction.
Calcium deficiency is a factor in the development of osteoporosis, and therefore implicated in backaches and back injury. Calcium excess has also been associated with back pain, particularly when calcium and magnesium intake are disproportionate. (The commonly recommended ratio of calcium to magnesium is 2:1.)
blood pressure (high)
Findings are inconsistent regarding calcium's ability to reduce the risk of high blood pressure. However, suboptimal calcium levels are associated with the development of salt sensitivity and hypertension.
A minimum of 500 mg of calcium per day reduces the risk of osteoporosis (as well as osteomalacia and rickets). However, calcium supplements are not effective without help from magnesium, folic acid, vitamin D, and boron.
blood sugar disorders
Calcium is crucial to maintaining the body's pH balance. A deficiency in anionic calciums is linked to low pH, and a deficiency in cationic calciums is linked to high pH. These pH imbalances can result in hyperglycemia or hypoglycemia.
Deficient calcium intake is associated with bone deterioration. A combination of calcium supplementation and resistance exercise may slow postmenopausal bone loss by 30-50 percent.
Sufficient calcium intake can prevent or relieve menstrual cramps.
Calcium is important to normal sleep. Supplementation with 1500-2000 mg daily in divided doses can treat insomnia and restlessness due to calcium deficiency.
dental problems
Adequate dietary intake of calcium and phosphorus is essential for healthy teeth and bones.
Depressed patients were helped significantly by a combination of 1000 mg of calcium gluconate and 600 IU of vitamin D, given twice a day for four weeks.
emotional disorders
Calcium supplements have what is termed a "biphasic" effect on mood. Low amounts elevate mood, but too much will depress nerve activity even to the extent of inducing psychosis. Interestingly, what is low for one person may be high for another. In one study of depressed patients, 1000 mg of calcium gluconate combined with 600 IU vitamin D were given twice daily for four weeks. These patients showed a significant elevation in mood compared to controls.
Pregnant women who take recommended levels of calcium have fewer pre-term and low birth-weight babies, and suffer lower incidence of pregnancy-related high blood pressure. However, intake in excess of 1500 mg per day can interfere with fetal absorption of the minerals zinc, iron and magnesium. The currently recommended intake is 1200 mg per day. Calcium and magnesium should be taken in a ratio of 1:1.
There is evidence that calcium intake of 1200 mg per day can reduce colon cancer risk by 75%. Calcium's protective effect depends on adequate levels of vitamin D.
intestinal health
Too much calcium can cause intestinal sluggishness.
leg cramps
Cramping of the legs at night often results from a mineral imbalance, most commonly reflecting calcium deficiency. Other possibilities include deficiencies of magnesium or potassium.
colon cancer
Studies have shown that calcium may help to prevent colon cancer. In at least one study, calcium supplementation was found to be more effective than dietary calcium in reducing colon cancer risk.
muscular dystrophy
Calcium and vitamin D are recommended for patients with muscular dystrophy, who typically show early signs of serious osteoporosis. This recommendation is based on benefits observed in healthy individuals.
Calcium supplements of 1500 to 2000 mg per day can reduce incidence of pregnancy related hypertension by 70% and preeclampsia by over 60%. Calcium and magnesium levels should be maintained at or around a ratio of 1:1 to avoid kidney stones and other issues.
carpal tunnel syndrome
Supplementation with a complex of calcium and magnesium (2:1 ratio) can reduce nerve irritation and muscle tightness, providing relief from carpal tunnel syndrome.

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