Calcium supplements are derivatives of natural products, such as oyster shell or bone. Some are marketed primarily as antacids. Calcium carbonate and phosphate preparations have the highest concentration of elemental calcium, about 40 percent. Calcium citrate contains 21 percent elemental calcium, and calcium lactate and gluconate contain 13 and 9 percent, respectively. Absorption of calcium citrate is 25 percent higher than that of calcium carbonate. For more info see www.raysahelian.com

If your diet does not include an adequate amount of calcium, a high quality calcium supplement could provide you with health benefits. It's the easy way to keep your bones healthy and strong.

Calcium reduces the risk of osteoporosis. Osteoporosis affects middle-aged and older persons. A lifetime of regular exercise and a healthy diet that includes calcium builds and maintain good bone health and may reduce the risk of osteoporosis late in life. Daily intakes above 1,000 mg are not proven to provide any additional benefits to bone health.

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Food sources of Calcium
The NIH recommends milk and other dairy products as a primary source of calcium. In addition, a variety of other foods are excellent sources of calcium as well. Dark green, leafy vegetables and foods with added calcium can be healthy ways to get enough calcium. By eating a wide variety of foods with calcium, you can help make sure to get the calcium you need each day. To purchase a Calcium supplement. You can also find Coral-Calcium-4ounces. For more information on coral calcium.

Calcium Dosage recommendations
A high dietary calcium intake combined with vitamin D can increase bone density and reduce fractures in older women and, probably, men. The Institute of Medicine recommends that persons 19 to 50 years of age consume 1,000 mg per day of calcium and that persons older than 50 years consume 1,200 mg per day. The average American consumes less than 800 mg of calcium per day.
   Taking calcium with food in dosages of 500 mg or less increases absorption. Calcium preparations must be dissolved before they can be absorbed; the absorption rate for calcium is about 20 to 30 percent. The absorption of calcium supplements differs by preparation. Foods such as spinach, rhubarb and wheat bran can decrease calcium absorption. Calcium can interfere with absorption of iron, zinc, bisphosphonates and tetracycline. Absorption also requires adequate doses of vitamin D. The recommended daily intake of vitamin D is 200 IU for adults younger than 50 years and 600 IU for those older than 70 years. Vitamin D supplementation is especially important in elderly persons because skin synthesis and absorption of vitamin D may be impaired.

Calcium side effects
The most common adverse effects of calcium supplements are constipation, intestinal bloating and excess gas. Adverse effects occur most frequently with calcium carbonate. Switching preparations or increasing fluid intake may relieve symptoms. Patients who form calcium-containing stones are generally advised not to take calcium supplements. However, a low intake of calcium can aggravate the risk of stone formation by increasing absorption and urinary excretion of oxalate. Calcium is best taken during meals.

Calcium and colon polyp
Treatment with calcium supplements for 4 years appears to provide protection against recurrent colorectal adenomas -- the type of polyp that leads to cancer -- for up to 5 years after the supplements are stopped. In the Calcium Polyp Prevention Study, daily calcium supplementation was associated with a reduced risk of colorectal adenomas. Calcium may reduce the risk of colorectal adenomas (and colorectal cancer) by forming a complex with bile acids and preventing potential carcinogens from contact with the inner mucosal lining of the colon. Calcium may have a specific effect on blocking formation of colon cells. Journal of the National Cancer Institute, January 17, 2007.

Calcium Products
Calcium-d-glucarate is a calcium product used not for osteoporosis but for toxin metabolism.

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