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Calcium CarbonateCarbonatesAnimal ShellsCalcium, DietaryLithium CarbonateAntacidsCalcification, PhysiologicCalcium CitrateCalcium SignalingPinctadaCalcium CompoundsCalcium PhosphatesAluminum HydroxideEgg ShellPhosphorusChemical PrecipitationPhosphorus Metabolism DisordersCalcium GluconateApatitesCalcium ChlorideCalcium ChannelsAnthozoaCalculiLithostathineHyperphosphatemiaLubricationMicroradiographyPhosphatesMineralsOtolithic MembraneCrystallizationParathyroid HormoneMagnesium HydroxideDihydrotachysterolAbsorptionSodium BicarbonatePolyaminesMicroscopy, Electron, ScanningBiological AvailabilityCalciumHydrogen-Ion ConcentrationHypercalcemiaPolyethylenesLanthanumSeawaterConstruction MaterialsCross-Over StudiesNacreStrongylocentrotus purpuratusCalcium IsotopesMagnesiumChelating AgentsPectinidae
Liter as calcium carbonateHardnessCaCO3SodiumSupplementsMineralsIntakeIonsLimestoneAntacidsKilogramBoneSupplementChewableMineralBicarbonateInternational SysteCrystalsGrainsCitrateHypercalcemiaAntacidFluoride2,500Tablet containsWaterCalcareousStrong bonesPotassiumAcidAbsorb calciumCrystallineSolubilityDeficiencyCorticosteroidsCaCOVegan dietHydroxideElemental calciumLevels of calciumFormRecommendsVitaminHigh level of calciumBones1,200 mgPowderOsteoporosis
Liter as calcium carbonate1
  • The ranges of selected physicochemical properties were as follows: oxidation-reduction potential ranged from -173 to 466 millivolts, dissolved oxygen ranged from less than 0.1 to 4.4 milligrams per liter, pH ranged from 7.2 to 7.8, specific conductance ranged from 439 to 724 microsiemens per centimeter at 25 degrees Celsius, and alkalinity ranged from 159 to 276 milligrams per liter as calcium carbonate. (usgs.gov)
Hardness12
  • In North America, the hardness of water is often measured in grains per US gallon (gpg) of calcium carbonate equivalents. (wikipedia.org)
  • Otherwise, water hardness is measured in the dimensionless unit of parts per million (ppm), numerically equivalent to density measured in milligrams per litre. (wikipedia.org)
  • Hardness in water comes from minerals like calcium and magnesium. (redmond.gov)
  • In fact, the measure of water hardness is expressed in various units that express how much calcium carbonate is in a given volume of water. (kjmagnetics.com)
  • Hardness minerals can be removed with a water softener, which replaces the calcium and magnesium (and iron, manganese, radium and other positive ions) with sodium. (healthvermont.gov)
  • For every milligram of hardness that is removed, 0.46 milligrams of sodium will be added to the water. (healthvermont.gov)
  • Wadsworth's raw water supply has a hardness of approximately 300 to 350 milligrams per liter. (wadsworthcity.com)
  • Through the treatment process, the hardness is reduced to a range of 180 to 250 milligrams per liter (expressed as Calcium Carbonate) or 11 to 15 Grains of Hardness. (wadsworthcity.com)
  • Water Hardness is composed of mostly calcium and magnesium. (sciencefaircenter.com)
  • Total Hardness (TH) is a measure of the total amount of calcium and magnesium that has naturally leached into the water during its journey through the watershed. (sciencefaircenter.com)
  • In the U.S. water hardness is most often reported as milligrams per liter (mg/L) or parts per million (ppm) as calcium carbonate (CaC03). (sciencefaircenter.com)
  • However, when it comes to the aquarium industry, the term KH or "carbonate hardness" can be used to refer to total alkalinity. (reefcraze.com)
CaCO33
  • Calcium carbonate (chemical formula CaCO3) occurs naturally in rocks like limestone, most often as calcite and aragonite minerals. (purebulk.com)
  • People on the groundwater system have medium-hard water, about 90 mg/l (milligrams per liter) as CaCO3 (calcium carbonate), or about 6 grains per gallon. (redmond.gov)
  • Calcium carbonate (CaCO3) is a naturally occurring essential mineral compound found in many forms, including limestone, chalk, marble, coral reefs, seashells and eggshells. (vegantab.com)
Sodium11
  • The largest ranges in concentration for filtered major ion constituents were obtained for cations sodium and calcium and for anions chloride and sulfate. (usgs.gov)
  • Each tablet contains: elemental calcium 400 mg, sodium 2 mg. (target.com)
  • Conventional water softeners work with an ion-exchange process, where the calcium and magnesium in the water are replaced by sodium. (kjmagnetics.com)
  • The U.S. Environmental Protection Agency recommends no more than 20 mg/L (milligrams per liter) of sodium in drinking water for people restricted to a total sodium intake of 500 mg/day (milligrams per day). (healthvermont.gov)
  • Baking soda has about 1,200 milligrams of sodium per recipe. (agingkingcounty.org)
  • Regular baking powder contains about 480 milligrams of sodium per teaspoon-fairly high but not as high as baking soda. (agingkingcounty.org)
  • You can buy low-sodium baking powder with zero and 30 milligrams of sodium per teaspoon. (agingkingcounty.org)
  • Contains 35 milligrams of sodium. (agingkingcounty.org)
  • One teaspoon contains 239 milligrams of sodium. (agingkingcounty.org)
  • One teaspoon of salt has about 2,300 milligrams of unhealthy sodium. (agingkingcounty.org)
  • 59. Where a statement of claim relating to the sodium content is made on the label of, or in any advertisement for, a food, the label shall carry a declaration of the sodium content in milligrams per 100 grams. (who.int)
Supplements32
  • When paired with vitamin D, calcium supplements may reduce the likelihood of bone fractures in older adults. (purebulk.com)
  • Calcium supplements may enhance heart health due to how calcium interacts with fats and vascular cells. (purebulk.com)
  • The older the woman, the more likely it is that consistent use of calcium and vitamin-D supplements will play a role in reducing her risk for osteoporosis, according to the results of a large national clinical trial conducted as part of the Women's Health Initiative (WHI). (sciencedaily.com)
  • Despite recommendations that women should ensure adequate calcium plus vitamin-D intake for postmenopausal bone health, the role of these supplements on reducing fractures has been conflicting. (sciencedaily.com)
  • Although diet is the best way to get calcium, calcium supplements may be an option if your diet falls short. (mayoclinic.org)
  • Before you consider calcium supplements, be sure you understand how much calcium you need, the pros and cons of calcium supplements, and which type of supplement to choose. (mayoclinic.org)
  • Who should consider calcium supplements? (mayoclinic.org)
  • In these situations, calcium supplements may help you meet your calcium requirements. (mayoclinic.org)
  • Talk with your doctor or dietitian about whether calcium supplements are right for you. (mayoclinic.org)
  • Do calcium supplements have risks? (mayoclinic.org)
  • Calcium supplements aren't for everyone. (mayoclinic.org)
  • For instance, if you have a health condition that causes excess calcium in your bloodstream (hypercalcemia), you should avoid calcium supplements. (mayoclinic.org)
  • It's not definitive, but there may be a link between high-dose calcium supplements and heart disease. (mayoclinic.org)
  • The evidence is mixed and more research is needed before doctors know the effect calcium supplements may have on heart attack risk. (mayoclinic.org)
  • Some studies have shown that high calcium intake from dairy products and supplements may increase risk, whereas another more recent study showed no increased risk of prostate cancer associated with total calcium, dietary calcium or supplemental calcium intakes. (mayoclinic.org)
  • Several different kinds of calcium compounds are used in calcium supplements. (mayoclinic.org)
  • It is the only calcium supplement in the world that is both amorphous (as opposed to crystalline) and nanoparticulate - made of nanoparticles, which are a million times smaller than the particles of any other crystalline calcium supplements. (amorphous-calcium.com)
  • People worried that they aren't getting enough calcium from their diet sometimes take calcium supplements, most often in the form of calcium carbonate. (healthfully.com)
  • These supplements can help you increase your calcium intake, but don't exceed the tolerable upper intake level of 2,500 milligrams per day unless your doctor recommends it because this can lead to potentially serious side effects. (healthfully.com)
  • Taking too much calcium carbonate may also increase your risk for heart disease and prostate cancer, but the evidence for this is still preliminary and conflicting, according to the Office of Dietary Supplements. (healthfully.com)
  • This includes natural sources of calcium, like milk and dairy, leafy green vegetables as well as almost all calcium supplements. (drmyattswellnessclub.com)
  • While the lead that may be present in supplements is undesirable, this must be balanced with the need for calcium for fetal development. (drmyattswellnessclub.com)
  • Some forms of calcium supplements such as calcium citrate and calcium malate are better absorbed and tend to have lower levels of lead. (drmyattswellnessclub.com)
  • However, there are certain conditions where people should consult a doctor before taking calcium carbonate supplements. (vegantab.com)
  • Are All Calcium Supplements Vegan? (vegantab.com)
  • Some calcium supplements are derived from animal sources. (vegantab.com)
  • There are other forms of calcium on the market than those listed below, but these are some of the most common forms found in supplements. (aor.us)
  • It is found in many calcium supplements and is even found in antacids like Tums, Rolaids, etc. because of its alkaline nature. (aor.us)
  • This is the reason why many supplements use calcium carbonate: it gives the appearance of a high elemental calcium content and doesn't take up much space in the capsule or tablet. (aor.us)
  • Milk-alkali syndrome is almost always caused by taking too many calcium supplements, usually in the form of calcium carbonate. (medlineplus.gov)
  • Otherwise, treatment involves drinking fluids along with reducing or stopping calcium supplements and antacids that contain calcium. (medlineplus.gov)
  • You take a lot of calcium supplements or you often use antacids that contain calcium, such as Tums. (medlineplus.gov)
Minerals7
Intake8
  • Nearly half of the world's population is also at risk due to low dietary intake of calcium. (purebulk.com)
  • Adequate calcium intake is particularly important for older adults to inhibit loss of bone mass, as sustaining bone mineral density helps maintain bone strength. (purebulk.com)
  • The calcium and magnesium in water can contribute positively to your overall mineral intake. (healthvermont.gov)
  • The adequate intake for potassium ranges from 400 to 5,100 milligrams each day, depending on your age. (livestrong.com)
  • Although usually caused by a medical condition and not supplement intake, high levels of calcium in the body, called hypercalcemia, may also cause anorexia and weight loss. (healthfully.com)
  • In the normal U.S. diet, iodine intake is about 250 micrograms or ¼ milligram (mg) of iodine per day, which goes into the thyroid cells and is incorporated into amino acids called tyrosine (in a large thyroglobulin molecule). (cdc.gov)
  • Aging, estrogen deficiency, low vitamin D or calcium intake, and certain disorders can decrease the amounts of the components that maintain bone density and strength. (msdmanuals.com)
  • Osteoporosis can usually be prevented and treated by managing risk factors, ensuring adequate calcium and vitamin D intake, engaging in weight-bearing exercise, and taking bisphosphonates or other medications. (msdmanuals.com)
Ions3
  • Calcium carbonate is the active ingredient in agricultural lime and is produced when calcium ions in hard water react with carbonate ions to form limescale . (wikipedia.org)
  • This causes the calcium ions to migrate outwards into the surrounding oxygen-containing atmosphere, leaving behind the carbon dioxide gas molecules. (vegantab.com)
  • Limescale - Also known as calcium carbonate, limescale comes from the heat-related breakdown of bicarbonate ions. (raynewater.com)
Limestone3
  • As rainwater moves through natural rock formations underground (usually limestone), it can dissolve the calcium and carry it into aquifers that serve as sources of drinking water. (healthvermont.gov)
  • This is a common form of calcium which is an alkaline-based compound found in rocks, limestone, marine animal shells, pearls, eggshells and snails. (aor.us)
  • When it exceeds 15°f. or 10 milligrams of limestone, the water is hard. (beautygarden.com)
Antacids4
Kilogram1
  • Anthers require over 20 milligrams per kilogram compared with three milligrams per kilogram in the flag leaf. (borates.today)
Bone11
  • Calcium is an essential mineral and electrolyte that the body needs to maintain optimum circulatory, digestive, and muscular health, and it's crucial for bone formation. (purebulk.com)
  • Research also shows that eating a calcium-rich diet directly correlates to superior bone health. (purebulk.com)
  • The FDA recognizes the importance of calcium for the normal development and maintenance of bone health. (purebulk.com)
  • The calcium-with-vitamin-D trial found a small but significant 1 percent higher hip bone density for women taking calcium combined with vitamin D compared to other women taking placebo. (sciencedaily.com)
  • Calcium is important for bone health. (mayoclinic.org)
  • Some studies suggest that calcium, along with vitamin D, may have benefits beyond bone health: perhaps protecting against cancer, diabetes and high blood pressure. (mayoclinic.org)
  • Calcium deficiency can lead to multiple diseases, such as osteoporosis, caused by bone mass loss (calcium leakage). (amorphous-calcium.com)
  • If the calcium consumption is low, the body cannot build new bones or the the bone breakdown process is accelerated, and in some cases, it is a combination of the two things. (amorphous-calcium.com)
  • Further, calcium taken without an appropriate amount of magnesium to balance it will have only very minor bone-building effects. (drmyattswellnessclub.com)
  • Vitamin D and calcium work hand-in-hand for bone creation and health, and vitamin D is perhaps best obtained in the form that Mother Nature intended - that is, from sunlight on skin. (drmyattswellnessclub.com)
  • Although it may seem to be a natural form of calcium, and therefore higher in absorbable calcium, the calcium in the oyster shells as well as in bone meal and dolomite, are more susceptible to have toxic levels of lead due to difficulty in maintaining quality control. (aor.us)
Supplement5
  • It has medical use as a calcium supplement or as an antacid , but excessive consumption can be hazardous and cause hypercalcemia and digestive issues. (wikipedia.org)
  • Density has been shown to be absorbed, 2 to 4.6 times more than any other calcium supplement in a scientific experiment in a hospital in Israel. (amorphous-calcium.com)
  • Density is a dietary supplement which emulates the biological process occurring in the bodies of blue crayfish, nature's most sophisticated calcium mechanism. (amorphous-calcium.com)
  • Constipation is one of the most common side effects of calcium carbonate, affecting up to 10 percent of people, and can occur even with smaller doses of this supplement. (healthfully.com)
  • Calcium carbonate is a common calcium supplement. (medlineplus.gov)
Chewable1
  • Featuring the active ingredient calcium carbonate, each chewable antacid tablet provides heartburn, sour stomach relief and acid indigestion relief, as well as upset stomach relief associated with these symptoms. (target.com)
Mineral4
Bicarbonate2
  • Calcium carbonate reacts with water that is saturated with carbon dioxide to form the soluble calcium bicarbonate . (wikipedia.org)
  • In reef tanks, alkalinity can exist in two forms: carbonate and bicarbonate. (reefcraze.com)
International Syste1
  • The Tower wheat grain was defined as exactly 45⁄64 gr (46 mg).: 74 Since the implementation of the international yard and pound agreement of 1 July 1959, the grain or troy grain (symbol: gr) measure has been defined in terms of units of mass in the International System of Units as precisely 64.79891 milligrams. (wikipedia.org)
Crystals2
Grains1
  • Units include ppm (parts per million), gpg (grains per gallon), or mg/L (milligrams per liter). (kjmagnetics.com)
Citrate3
Hypercalcemia1
Antacid1
Fluoride4
  • Natural groundwater in this area has around 0.3 milligrams per liter of fluoride in it. (wadsworthcity.com)
  • We add extra fluoride to the water to bring the level up to 0.8 to 1.2 milligrams per liter. (wadsworthcity.com)
  • Studies have shown that water with a fluoride level of 1 milligrams per liter will help prevent tooth decay. (wadsworthcity.com)
  • Fluoridated community water systems adjust fluoride to approximately 0.7 milligrams per Liter (mg/L). Because in some rare locations fluoride is naturally present in water at much higher levels, the EPA established a Maximum Contaminant Level (MCL) for fluoride of 4.0 mg/L (parts per million). (cdc.gov)
2,5001
Tablet contains1
Water37
  • This reaction is important in the erosion of carbonate rock , forming caverns , and leads to hard water in many regions. (wikipedia.org)
  • note] Soft water contains 1-4 gpg of calcium carbonate equivalents, while hard water contains 11-20 gpg. (wikipedia.org)
  • Sample analysis indicated a calcium-carbonate type water having a total dissolved solids concentration of 39 milligrams per liter. (usgs.gov)
  • Although the presence of Na in irrigation water in important, it is its concentration in relationship to calcium (Ca) and magnesium (Mg) that must be scrutinized. (ufl.edu)
  • It can form hard deposits of calcium called scale, affecting faucets, shower-heads, dishwashers, and heating elements of water heaters. (kjmagnetics.com)
  • Conventional salt-based water softeners periodically run a regeneration process, where the removed calcium and magnesium is washed out, dumping water down the drain. (kjmagnetics.com)
  • Magnetic water treatment does not remove any calcium from the water. (kjmagnetics.com)
  • With conventional, salt-based water softening, it's easy to measure the amount of calcium dissolved in the water. (kjmagnetics.com)
  • With magnetic water treatment, no calcium is removed. (kjmagnetics.com)
  • Measuring calcium content before and after shows the same amount in the water. (kjmagnetics.com)
  • Water described as "hard" contains high amounts of calcium and magnesium, which are naturally found in the Earth's crust. (healthvermont.gov)
  • Health concerns: Is hard water or an abundance of calcium harmful to my health? (healthvermont.gov)
  • Hard water (high in calcium and magnesium) is not a health risk. (healthvermont.gov)
  • An 8-ounce glass of moderately hard water contains about 50 to 75 mg of calcium. (healthvermont.gov)
  • Source: How does calcium get into my water? (healthvermont.gov)
  • Testing: How do I know if calcium is in my water? (healthvermont.gov)
  • High levels of calcium in drinking water mean you have "hard water. (healthvermont.gov)
  • Treatment options: Can I remove or lower the levels of calcium in my water? (healthvermont.gov)
  • A general rule of thumb is if your water is more than 120 milligrams per liter you might consider a water softener to reduce the formation of scale in your hot water system and make washing easier. (wadsworthcity.com)
  • Yes, state law requires that we chlorinate our water supply and maintain a minimum chlorine residual in the distribution system of at least 0.2 milligrams per liter. (wadsworthcity.com)
  • Typically water leaving the water treatment plant has a chlorine level around 1 milligram per liter. (wadsworthcity.com)
  • These crayfish live in a low-calcium, sweet- water environment. (amorphous-calcium.com)
  • Calcium carbonate is used as a water treatment chemical and an acid neutralizer in the paper industry. (vegantab.com)
  • Hard water is present in areas where there are excess amounts of calcium and magnesium in the ground. (johnsonwater.com)
  • These calcium and magnesium particles infiltrate the water supply, making it hard, and thereby giving it several not-so-desirable effects. (johnsonwater.com)
  • In fact, the Northeastern Illinois region contains very hard water, as the area's soil is rich with calcium and magnesium. (johnsonwater.com)
  • On average, New England's water contains 0 to 60 milligrams of calcium carbonate per liter of water. (johnsonwater.com)
  • Northeastern Illinois (and thus Homer Glen) contains 181 to 250 milligrams of calcium carbonate per liter of water. (johnsonwater.com)
  • Hard water contains excess amounts of calcium and magnesium. (johnsonwater.com)
  • The calcium and magnesium particles tend to impair the chemical reaction that occurs between soap and water. (johnsonwater.com)
  • Fortunately, your local water softening company in Homer Glen, Illinois can install a Pentair water softener to remove calcium and magnesium from your water, which will provide you with more soap suds. (johnsonwater.com)
  • Doing so will remove excess calcium and magnesium from your water supply, thereby making it as functional as possible. (johnsonwater.com)
  • These models use a process called "ion-exchange" to draw out the excess calcium and magnesium present in the water and "soften" it before use. (rv4campers.com)
  • Calcareous water is water containing calcium carbonate and magnesium carbonate. (beautygarden.com)
  • The water's hydrotimetric titre (TH) is a measure of the calcium and magnesium in the water. (beautygarden.com)
  • When it comes to the base, carbonate is the most common and important one found in the water. (reefcraze.com)
  • When we want to measure the total alkalinity in surface water, we use mg/L or milligrams per liter approach. (reefcraze.com)
Calcareous1
Strong bones4
  • Calcium is essential for forming and maintaining strong bones and teeth. (purebulk.com)
  • Your body needs calcium to build and maintain strong bones. (mayoclinic.org)
  • You need calcium for proper nerve and muscle function and for forming strong bones. (healthfully.com)
  • Calcium carbonated drinks are popular among children because they help build strong bones. (vegantab.com)
Potassium1
  • however, most manufacturers limit the amount of potassium to 99 milligrams. (livestrong.com)
Acid3
  • If a Rolaids tablet neutralizes 42.15 mL of .0320 M hydrochloric acid how many milligrams of calcium carbonate are in Rolaids tablet? (chemicalforums.com)
  • This is a better form than carbonate for people with low stomach acid or people over the age of 50. (aor.us)
  • It is refluxed (heated) with sulfuric acid to produce a phosphoric acid-gypsum (calcium sulfate-CaSO4) slurry. (cdc.gov)
Absorb calcium3
  • The body needs vitamin D to absorb calcium. (purebulk.com)
  • To absorb calcium, your body also needs vitamin D. A few foods naturally contain small amounts of vitamin D, such as canned salmon with bones and egg yolks. (mayoclinic.org)
  • is needed to absorb calcium from food and incorporate it into bones. (msdmanuals.com)
Crystalline1
Solubility2
  • Last time we looked at determining elemental calcium content in Part 1 of Understanding Different Types of Calcium , what the solubility/bioavailability of various forms of calcium means for us, and factors that affect calcium absorption in our bodies. (aor.us)
  • Because of its low solubility, and perhaps because of its inconsistent absorption rate, it is generally considered to be one of the least bioavailable forms of calcium. (aor.us)
Deficiency6
Corticosteroids1
CaCO1
  • 42.15 mL sol'n x .320 M HCl/1000 mL sol'n x 1 mol CaCO 3 /2 mol HCl = 0.00674 mol CaCO 3 my trouble is with finding milligrams of calcium carbonate I am not sure what comes next? (chemicalforums.com)
Vegan diet1
Hydroxide2
  • It is formed by heating calcium hydroxide at high temperatures. (vegantab.com)
  • aluminum hydroxide/magnesium carbonate will decrease the level or effect of dolutegravir by cation binding in GI tract. (medscape.com)
Elemental calcium1
Levels of calcium1
  • Having high levels of calcium over a period of time may cause your soft tissues, such as those in your organs, to become calcified, or hardened, because of calcium deposits. (healthfully.com)
Form1
  • There is no research to confirm that coral calcium is in fact a better form of calcium than other forms. (aor.us)
Recommends1
Vitamin5
  • Study leaders say that even the slight benefits demonstrated by the trial involving more than 36,000 participants suggest calcium and vitamin-D supplementation provides an overall public health benefit to postmenopausal women. (sciencedaily.com)
  • The findings from the calcium and vitamin-D supplementation arm of the WHI are published in the Feb. 16 issue of the New England Journal of Medicine. (sciencedaily.com)
  • Half of the 36,282 participants in the supplementation trial received a daily dose of 1,000 milligrams of calcium carbonate combined with 400 international units (IUs) of vitamin D, while the other half received placebo. (sciencedaily.com)
  • This interferes with the functioning of these organs but isn't likely to occur unless you have impaired kidney function, according to the National Academies Press publication "Dietary Reference Intakes for Calcium and Vitamin D. (healthfully.com)
  • Calcium and vitamin D are vital especially during the third trimester, when baby's bones are growing and strengthening. (drmyattswellnessclub.com)
High level of calcium1
  • It is enlightening to observe how, despite their low-calcium environment, the crayfish are able to store, stabilize and utilize amorphous calcium carbonate for the rapid absorption of the high level of calcium needed for their process of shedding and forming a new exoskeleton within a span of only three days. (amorphous-calcium.com)
Bones4
  • Our body needs calcium to maintain strong and healthy bones and for the proper functioning of various systems in our body. (amorphous-calcium.com)
  • A lack of calcium does not give its signals in the immediate term because the body manages to maintain calcium levels in the blood by breaking it down from the bones of the skeleton. (amorphous-calcium.com)
  • Your bones and teeth hide most of this calcium, and they release it as needed. (livestrong.com)
  • Children under age 9 do not need additional calcium because their bones are still developing. (vegantab.com)
1,200 mg1
  • The recommended daily calcium requirements are 1,200 mg per day for adults over 19 years old. (vegantab.com)
Powder2
Osteoporosis2
  • Why is it important to take calcium even if I have not yet been diagnosed with osteoporosis? (amorphous-calcium.com)
  • If you are trying to prevent osteoporosis, do not take more than 1.2 grams (1200 milligrams) of calcium per day unless instructed by your provider. (medlineplus.gov)