Reviewed on 6/11/2021
Other Name(s):

Calcaire Dolomitique, Dolomita, Dolomitic Limestone.


Dolomite is a type of limestone. It is rich in magnesium and calcium carbonate, and has smaller amounts of several other minerals.

People take dolomite as a calcium and magnesium supplement.

How does it work?

Dolomite might be a good source of calcium carbonate and magnesium.


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Uses & Effectiveness

Insufficient Evidence to Rate Effectiveness for...

  • Use as a source of calcium and magnesium.
  • Other conditions.
More evidence is needed to rate the effectiveness of dolomite for these uses.

Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, and Insufficient Evidence to Rate (detailed description of each of the ratings).

Side Effects

Dolomite is POSSIBLY UNSAFE for most adults when taken by mouth. Some dolomite products might be contaminated with heavy metals like aluminum, arsenic, lead, mercury, and nickel. Because of this concern, it might be wise to choose a safer calcium or magnesium supplement. Also, dolomite might cause stomach irritation, constipation, nausea, vomiting, and diarrhea.

Don't take dolomite in large amounts for long periods or in combination with other calcium or magnesium supplements.


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Special Precautions & Warnings

Pregnancy and breast-feeding: It is POSSIBLY UNSAFE to use dolomite if you are pregnant or breast-feeding because of the risk of heavy metal contamination. It's best to avoid use.

Children: Dolomite is POSSIBLY UNSAFE for most children when taken by mouth. Children are more sensitive than adults to contaminants such as lead. It's best to avoid use.

Heart block: If you have this condition, don't use dolomite because it is a source of magnesium. Extra magnesium is not good for people with heart block.

Problems with the parathyroid gland: The parathyroid gland, which is located near the thyroid gland in the neck, releases a hormone that regulates the amount of calcium in the blood. If this gland is either too active (hyperparathyroidism) or underactive (hypoparathyroidism), the calcium balance is disturbed. Taking dolomite, a source of calcium, can make the balance even worse. Don't take dolomite if you have a problem with your parathyroid gland.

Kidney disease: Extra magnesium and calcium can harm people with kidney disease. Since dolomite is a source of both of these minerals, don't use it if you have serious kidney problems.

Sarcoidosis: This condition increases the risk of absorbing too much calcium. Don't take dolomite if you have this condition, because it is a source of calcium.


Water pills (Thiazide diuretics)Interaction Rating: Major Do not take this combination.

Dolomite contains calcium. Some "water pills" increase the amount of calcium in the body. Taking large amounts of calcium with some "water pills" might cause there to be too much calcium in the body. This could cause serious side effects including kidney problems.

Some of these "water pills" include chlorothiazide (Diuril), hydrochlorothiazide (HydroDiuril, Esidrix), indapamide (Lozol), metolazone (Zaroxolyn), and chlorthalidone (Hygroton).

Antibiotics (Quinolone antibiotics)Interaction Rating: Moderate Be cautious with this combination.Talk with your health provider.

Dolomite might decrease how much antibiotic the body absorbs. Taking dolomite along with some antibiotics called quinolone antibiotics might decrease the effectiveness of these antibiotics. To avoid this interaction take dolomite supplements at least one hour after antibiotics.

Some of these quinolone antibiotics that might interact with dolomite include ciprofloxacin (Cipro), enoxacin (Penetrex), norfloxacin (Chibroxin, Noroxin), sparfloxacin (Zagam), trovafloxacin (Trovan), and grepafloxacin (Raxar).

Antibiotics (Tetracycline antibiotics)Interaction Rating: Moderate Be cautious with this combination.Talk with your health provider.

Dolomite contains calcium. The calcium in dolomite can attach to some antibiotics called tetracyclines in the stomach. This decreases the amount of tetracyclines that the body can absorb. Taking dolomite along with tetracyclines might decrease the effectiveness of tetracyclines. To avoid this interaction take dolomite two hours before or four hours after taking tetracyclines.

Some tetracycline antibiotics include demeclocycline (Declomycin), minocycline (Minocin), and tetracycline (Achromycin).

BisphosphonatesInteraction Rating: Moderate Be cautious with this combination.Talk with your health provider.

Dolomite can decrease how much bisphosphate the body absorbs. Taking dolomite along with bisphosphates can decrease the effectiveness of bisphosphate. To avoid this interaction take bisphosphonate at least 30 minutes before dolomite or later in the day.

Some bisphosphonates include alendronate (Fosamax), etidronate (Didronel), risedronate (Actonel), tiludronate (Skelid), and others.

EstrogensInteraction Rating: Moderate Be cautious with this combination.Talk with your health provider.

Dolomite contains calcium. Estrogens help the body absorb calcium. Taking estrogens along with large amounts of calcium might increase calcium in the body too much.

LevothyroxineInteraction Rating: Moderate Be cautious with this combination.Talk with your health provider.

Levothyroxine is used for low thyroid function. Dolomite can decrease how much levothyroxine the body absorbs. Taking dolomite along with levothyroxine might decrease the effectiveness of levothyroxine.

Some brands that contain levothyroxine include Armour Thyroid, Eltroxin, Estre, Euthyrox, Levo-T, Levothroid, Levoxyl, Synthroid, Unithroid, and others.

Sotalol (Betapace)Interaction Rating: Moderate Be cautious with this combination.Talk with your health provider.

Dolomite contains calcium. Taking calcium with sotalol (Betapace) can decrease how much sotalol the body absorbs. This could decrease the effectiveness of sotalol. Take dolomite at least two hours before or four hours after taking sotalol.

Water pills (Potassium-sparing diuretics)Interaction Rating: Moderate Be cautious with this combination.Talk with your health provider.

Dolomite contains magnesium. Some "water pills" can increase magnesium levels in the body. Taking some "water pills" along with dolomite might cause too much magnesium to be in the body.

Some "water pills" that increase magnesium in the body include amiloride (Midamor), spironolactone (Aldactone), and triamterene (Dyrenium).


The appropriate dose of dolomite depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for dolomite. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

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