Calcium 500+
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Calcium 500+

120 Tablets - Mfg 05/2018

$ 12.00

  • Derived from mined calcium hydroxide then chelated with ascorbic acid, aspartic acid, citric acid and lysine then combined with Vitamin D3 to maximize intestinal absorption of calcium*
  • Calcium ascorbate, or Vitamin C, is buffered to ensure that it is gentle on your digestive system*
  • For a slow release, we bind the calcium in a fiber tablet - the Controlled Delivery System. The tablet dissolves over a longer period and prevents gastrointestinal distress.* 
  • No dairy, soy, gluten, iodine, yeast, sugar, artificial colors, or preservatives


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Only thirty (30) percent of the US population 2 years of age and older obtain the recommended level of calcium. [1]  

People at risk for calcium deficiency [2]
  • Postmenopausal women
  • Women of childbearing age who exercise heavily or eat too little (anorexia) or both
  • Lactose-intolerant people
  • Vegans and ovo-vegetarians
  • Patients taking cholesterol-reducing medications, corticosteroids, loop diuretics, and anti-seizure medications [3]

People who should use calcium supplements with caution
Calcium can interact with many over-the-counter (e.g., antacids, ) and prescription medications (e.g., Alendronate, beta- or calcium-channel blockers, Digoxin, Thiazide diuretics, Amiloride, Gentamicin and Quinolone and Tetracycline antibiotics. The effects may be minimized by taking calcium at a different time - but always inform and consult with your physician when taking calcium and other medications. [3]


[1] Nicklas TA, O'Neil CE, Fulgoni VL III. "The role of dairy in meeting the recommendations for shortfall nutrients in the American diet", Journal of American College of Nutrition, 2009

[2] National Institute of Health, Calcium, <>, accessed April 16, 2015,  Who may suffer from a deficiency?

[3] University of Maryland Medical Center, <, accessed May 6, 2015, Possible Interactions with Calcium


Symptoms of calcium deficiency are not readily apparent. Your body ensures the availability of calcium for blood coagulation, nerve impulses, and muscle contractions by controlling blood calcium levels. When dietary calcium is inadequate, your body steals the bone's calcium - but it takes years for a loss of calcium from bones to jeopardize your health.  That is why osteoporosis is considered a bone-thinning and silent disease.

Source: New York State Osteroporosis Prevention and Education Program, <>, accessed May 6, 2015, Calcium and Health Bones


A Recommended Dietary Allowance (RDA) is the average daily dietary intake level sufficient to meet the nutrient requirements of 97 to 98 percent of healthy individuals in a group.

Ages Males Females Pregnancy
9-13 years 1,300 mg 1,300 mg
14-18 years 1,300 mg 1,300 mg 1,300 mg
19-30 years 1,000 mg 1,000 mg 1,000 mg
31-50 years 1,000 mg 1,000 mg 1,000 mg
51-70 years 1,000 mg 1,200 mg
>70 years 1,200 mg 1,200 mg
Source: Dietary Reference Intakes: Recommended Dietary Allowances and Adequate Intakes, Food and Nutrition Board, Institute of Medicine, National Academies

Food Facts

Food sources of Calcium:

Milk and Milk Products Legumes
Low-fat yogurt 1 cup 415 mg Tofu 1 cup 310 mg
Chedder cheese 1 oz 205 mg Cooked beans 1 cup 100 mg
Cottage cheese 1 cup 140 mg Lima beans 1 cup 80 mg
Meats and Fish Vegetables
Sardines, with bone 3 oz 325 mg Collard greens 1 cup 220 mg
Canned Salmon with bone 3 oz 181 mg Spinach, cooked 1 cup 180 mg
Broccoli 1 cup 140 mg

Source: U.S. Department of Agriculture, Agricultural Research Service, 2011 USDA National Nutrient Database for Standard Reference, Release 24.

Only a few non-milk foods contain calcium, and substantially less calcium is absorbed from these foods than from milk. Vegetables contain oxalic acid and legumes contain phytic acid, and these acids interfere with calcium absorption. Compared with calcium absorption from milk, calcium absorption from dried beans is about 50 percent and from spinach it is about 10 percent.

Source:Otten JJ, Hellwig JP, Meyers, LD, Dietary Reference Intakes: The Essential Guide to Nutrient Requirements, National Academies Press, 2006,

Latest Research


Do calcium dissolution tests work?
This test applies to calcium carbonate tablets, an inexpensive form of calcium. This do-it-yourself test is inapplicable to our calcium chelates. ANR assures solubility by conducting pilot dissolution tests prior to production. Any dissolution problems are detected early, sometimes delaying production. However, we consider this a small sacrifice for continuing our legacy of high quality nutritional supplements.

Do you use bone meal, oyster shell or dolomite as natural sources of calcium?
No. Dolomite, bone meal and oyster shell are noted for containing high amounts of lead. [1]   Our calcium is derived from mined calcium hydroxide. Each ANR production lot is tested for lead, and the maximum allowable amount is 10 parts per million (ppm).  Our lots typically contain less than 0.001 ppm. 

More FAQs>>

[1] Ross EA, Szabo NJ, Tebbett IR, Lead content of calcium supplements, Journal of American Medical Association, September 20, 2000, p 425-9

*These statements have not been evaluated by the Food and Drug Administration.
This product is not intended to diagnose, treat, cure, or prevent any disease.

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