Calcium is critical for building and maintaining strong bones and preventing osteoporosis. Calcium is also needed for the proper functioning of nerves, muscles, glands, and the cardiovascular system.
Some people don't get enough calcium and can benefit from calcium supplements. But you need to be careful! If you take too much calcium from supplements, you may be increasing your risk of heart attack and kidney stones.
You also need to be concerned about the quality of calcium supplements. Out of 15 calcium supplements recently purchased by ConsumerLab.com, 3 failed quality testing because they contained incorrect amounts of other key ingredients -- one contained 183% of its listed amount of vitamin D, another contained 89% of its listed vitamin D, while a third contained none of its listed vitamin K2.
You must become a ConsumerLab.com member to get the test results and quality ratings for the calcium supplements we tested, including combination products with vitamin D, vitamin K, and magnesium. You will get results for 27 calcium supplements: 15 selected for testing by ConsumerLab.com and 12 others that passed the same tests through CL's voluntary Quality Certification Program. In this comprehensive report, you'll discover:
- Which calcium supplements failed our quality ratings and which passed -- including combinations with vitamin D, vitamin K, and magnesium
- Cost comparisons to help you choose a calcium supplement offering the best value based on amounts of elemental calcium
- The pros and cons of different forms of calcium such as carbonate, citrate, oyster shell, and coral calcium and which may be best for you
- Recommendations on calcium dosage by age and gender and for specific uses, as well as how much calcium may be too much and how best to take calcium supplements
- Potential drug interactions and side effects of calcium supplements
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