What does fact checked mean?
At Healthfully, we strive to deliver objective content that is accurate and up-to-date. Our team periodically reviews articles in order to ensure content quality. The sources cited below consist of evidence from peer-reviewed journals, prominent medical organizations, academic associations, and government data.
- Office of Dietary Supplements: Calcium
- Office of Dietary Supplements: Magnesium
- MedlinePlus: Calcium Supplements
The information contained on this site is for informational purposes only, and should not be used as a substitute for the advice of a professional health care provider. Please check with the appropriate physician regarding health questions and concerns. Although we strive to deliver accurate and up-to-date information, no guarantee to that effect is made.
Dolomite is a type of limestone that is made up of calcium carbonate and magnesium carbonate as well as other essential minerals 1. Because of this, it's sometimes used in dietary supplements 23. Check with your doctor before using dolomite to make sure it would be safe for you 1.
Dolomite is a source of calcium, which you need for nerve and muscle function and for keeping your bones and teeth strong 1. If you don't get enough calcium, you're more likely to develop osteoporosis as you get older. Dolomite consists of approximately 54 percent calcium -- so there's roughly 540 milligrams of calcium per gram of dolomite 1. Adults need about 1,000 milligrams of calcium but less than 2,500 milligrams per day for optimal health. You can also get calcium from foods, including green leafy vegetables, dairy products, canned salmon or sardines and fortified foods and beverages. Getting too much calcium could increase your risk for kidney stones and constipation.
Don't consume more than 350 milligrams of magnesium per day from supplements, as this could cause:
- toxicity symptoms
- including nausea
- abdominal cramps
- irregular heartbeat
- low blood pressure
- difficulty breathing 3
The type of calcium found in dolomite, calcium carbonate, isn't as easy for your body to break down and absorb as some other types of calcium, including calcium citrate 1. You need to have plenty of stomach acid to use calcium carbonate, so it's best to take it with food. As with any calcium supplement, spread your dose throughout the day so you're not taking more than 500 milligrams at a time to increase absorption.
Dolomite can sometimes be contaminated with high amounts of lead, barium, mercury and other toxic chemicals 1. If you take supplements containing dolomite, choose those with the United States Pharmacopeia symbol on the label, as these have to be tested to ensure they don't contain contaminants above certain levels 1.
- Thomas Northcut/Photodisc/Getty Images