The Who, What, Where, When and Sometimes, Why.

Calcium

Calcium

What is it?

Calcium is a mineral that is an essential part of bones and teeth. The heart, nerves, and blood-clotting systems also need calcium to work.

Calcium is commonly taken by mouth for the treatment and prevention of low calcium levels and resulting bone conditions including muscle cramps (latent tetany), osteoporosis (weak bones due to low bone density), rickets (a condition in children involving softening of the bones), and osteomalacia (a softening of bones involving pain).

Calcium is sometimes taken by mouth to reduce high levels of the parathyroid hormone (hyperparathyroidism) and treat symptoms of premenstrual syndrome (PMS) along with many other conditions.

Calcium carbonate is taken by mouth as an antacid for “heartburn.” Calcium carbonate and calcium acetate are also taken by mouth to reduce phosphate levels in people with kidney disease.

Calcium is also used as a mouth rinse to prevent and reduce pain and swelling inside of the mouth following chemotherapy. Calcium is given intravenously (by IV) for very low calcium levels of the blood and related symptoms. It is also used for high potassium levels in the blood .

Calcium-rich foods include milk and dairy products, kale and broccoli, as well as the calcium-enriched citrus juices, mineral water, canned fish with bones, and soy products processed with calcium.

Calcium can interact with many prescription medications, but sometimes the effects can be minimized by taking calcium at a different time. See the section titled “Are there any interactions with medications?”

Natural Medicines rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, Ineffective, and Insufficient Evidence to Rate.

The effectiveness ratings for Calcium are as follows:

Effective for…

  • Indigestion. Taking calcium carbonate by mouth as an antacid is effective for treating indigestion.
  • High levels of potassium in the blood (hyperkalemia). Giving calcium gluconate intravenously (by IV) can reverse heart problems caused by hyperkalemia, a condition in which there is too much potassium in the blood.
  • Low levels of calcium in the blood (hypocalcemia). Taking calcium by mouth is effective for treating and preventing hypocalcemia. Also, giving calcium intravenously (by IV) is effective for treating very low levels of calcium.
  • Kidney failure. Taking calcium carbonate or calcium acetate by mouth is effective for controlling high phosphate levels in the blood in people with kidney failure. Calcium citrate is not effective for treating this condition.

Likely Effective for…

  • Weakened bones (osteoporosis) caused by corticosteroid drugs. Taking calcium along with vitamin D seems to reduce the loss of bone mineral in people using corticosteroid drugs long-term.
  • Parathyroid gland disorder (hyperparathyroidism). Taking calcium by mouth reduces parathyroid hormone levels in people with kidney failure and parathyroid hormone levels that are too high.
  • Osteoporosis. Taking calcium by mouth is effective for preventing bone loss and treating osteoporosis. Most bone growth occurs in the teenage years . After that, bone strength in women remains about the same until age 30-40. After age 40, bone loss typically occurs at rates of 0.5% to 1% per year. In men, this bone loss occurs several decades later. Bone loss is greater in people getting less than the recommended amount of calcium from their diet. This is very common among Americans. Bone loss in women over 40 can be reduced by taking calcium supplements. Some researchers estimate that taking calcium for 30 years after menopause might result in a 10% improvement in bone strength . Taking calcium alone or with vitamin D also helps prevent fractures in people with osteoporosis.
  • Reducing symptoms of premenstrual syndrome (PMS). There seems to be a link between low dietary calcium intake and symptoms of PMS. Consuming calcium daily seems to significantly reduce mood swings, bloating, food cravings, and pain. Also, increasing the amount of calcium in one’s diet seems to prevent PMS. Women consuming an average of 1283 mg/day of calcium from foods seem to have about a 30% lower risk of developing PMS than women who consume an average of 529 mg/day of calcium. Taking calcium supplements, however, does not seem to prevent PMS. Women consuming an average of 1283 mg/day of calcium from foods seem to have about a 30% lower risk of PMS than women who consume an average of 529 mg/day of calcium.

Possibly Effective for…

  • Colorectal cancer. Research suggests that high intake of dietary or supplemental calcium reduces the risk of colorectal cancer. However, some conflicting evidence exists. This may be due to differences in blood levels of vitamin D. People with low levels of vitamin D do not seem to benefit from calcium supplements.
  • Increasing bone strength in fetuses. In pregnant women who eat a low amount of calcium as part of their diet, calcium supplementation increases the bone mineral density of the fetus. However, this does not appear to be beneficial for women with normal calcium levels.
  • Fluoride poisoning. Taking calcium by mouth, together with vitamin C and vitamin D supplements, seems to reduce fluoride levels in children and improve symptoms of fluoride poisoning.
  • High cholesterol. Taking calcium supplements along with a low-fat or low-calorie diet seems to modestly reduce low-density lipoprotein (LDL) or “bad” cholesterol and modestly increase high-density lipoprotein (HDL) or “good” cholesterol. Taking calcium alone, without the restricted diet, does not seem to lower cholesterol.
  • High blood pressure. Taking calcium supplements seems to reduce blood pressure slightly (usually around 1-2 mmHg) in people with or without high blood pressure. Calcium seems to work best in salt-sensitive people and people who normally get very little calcium. Taking calcium by mouth also seems to be helpful for reducing blood pressure in people with serious kidney disease. Taking calcium with vitamin D might not reduce blood pressure.
  • High blood pressure during pregnancy (pre-eclampsia). Taking 1-2 grams of calcium by mouth daily seems to reduce the risk of pregnancy-related high blood pressure by about 50%. Calcium appears to have the greatest effect when started at week 20 of pregnancy, in high-risk women, and women with low calcium levels.
  • Tooth loss. Taking calcium and vitamin D by mouth appears to help prevent tooth loss in older people.
  • Weight loss. Adults and children with low calcium intake are more likely to gain weight, have a higher body mass index (BMI), and be overweight or obese compared to people with high calcium intake. Researchers have studied whether increasing calcium intake might help with weight loss. Results are mixed. Some clinical research shows that increasing calcium consumption from dairy products, such as yogurt, increases weight loss, lean body mass, and body fat loss in people on a low-calorie diet as well as people on a regular unrestricted-calorie diet. Also, taking calcium supplements along with vitamin D seems to increase weight loss in people who have inadequate intake of calcium. Calcium supplements don’t seem to increase weight loss in people with adequate calcium intake. Also, calcium does not appear to increase weight loss in people who are not overweight.

Possibly Ineffective for…

  • Breast cancer. Some research suggests that women who eat more calcium have a reduced risk for developing breast cancer. However, other research suggests that blood levels of calcium are not linked with breast cancer risk. Overall, most research suggests that taking calcium does not reduce the risk for breast cancer.
  • Fractures. Taking calcium alone or with vitamin D does not seem to prevent fractures in older people without osteoporosis.
  • Reducing the risk of death. Research shows that taking calcium supplementation does not reduce the overall risk of death.
  • Heart disease. Most research shows that there is no association between calcium supplementation and the risk of heart disease in healthy people.
  • Heart attack. Early research suggests that people who consume more calcium in their diet have a lower risk of having a heart attack. However, the effects of calcium SUPPLEMENTS on heart attack risk are not clear. Some research suggests that calcium supplements increase heart attack risk. Other research shows there is no effect. It may be that some people have an increased risk while others do not. For example, people who take calcium as a single supplement might have an increased risk. On the other hand, people who take calcium with vitamin D do not seem to have an increased risk. Also, people who take a calcium supplement and consume more than 805 mg/day of calcium as part of their diet might be at an increased risk, while people who take a supplement and consume less calcium in their diet might not.

Ineffective for…

  • Cardiac arrest. Giving calcium during cardiac arrest does not increase survival and might actually worsen the chance for resuscitation.
  • Heart disease. There is no link between calcium supplementation and the risk of heart disease or heart disease related death.
  • Nerve damage caused by the anticancer drug oxaliplatin. Giving calcium and magnesium into the vein does not reduce nerve pain caused by this drug.

Insufficient Evidence to Rate Effectiveness for…

  • Condition of hardened or narrowed arteries (atherosclerosis). Early research shows that taking calcium for up to 3 years does not reduce the risk of atherosclerosis in older women.
  • Cancer. Research shows that taking calcium alone does not reduce the risk of cancer. Taking calcium along with vitamin D might reduce the risk of cancer in some people, but results are conflicting. Some research shows that taking 1400-1500 mg of calcium daily plus 1100 IU of vitamin D3 (cholecalciferol) daily lowers the risk of developing cancer by 60% in healthy older women who have low blood levels of vitamin D before treatment. But other research shows that taking 1500 mg of calcium daily plus 2000 IU of vitamin D3 (cholecalciferol) daily does not reduce the risk of developing cancer in healthy older women who have adequate levels of vitamin D before treatment.
  • Diabetes. Some early research suggests that consuming more calcium from the diet or from supplements, either alone or in combination with vitamin D, lowers the risk of developing type 2 diabetes.
  • Painful periods. Research shows that taking calcium with a high dose of vitamin D does not reduce pain during painful periods. However, taking calcium without vitamin D might be beneficial.
  • High levels of lead in the blood. Some research suggests that taking calcium supplements does not lower the levels of lead in the blood. However, other research suggests that taking calcium reduces blood lead levels by 11%.
  • Endometrial cancer. Taking calcium supplements might reduce the risk of developing endometrial cancer. However, dietary calcium does not seem to have any benefit.
  • Preventing falls. Evidence suggests that calcium plus vitamin D might help prevent falls by decreasing body sway and helping to keep blood pressure normal. Calcium alone does not seem to have the effect. Interestingly, calcium plus vitamin D seems to prevent falls in women, but not in men.
  • Preventing cancers of the blood or lymphatic system. Taking calcium supplements with vitamin D might reduce the risk of developing cancers of the blood or lymphatic system in older women. It is unknown if taking calcium alone reduces cancers of the blood.
  • Stroke. There is some evidence that increasing calcium intake in the diet might decrease the risk of stroke. Other evidence suggests that increasing calcium intake does not reduce the risk of stroke.
  • Metabolic syndrome. Some evidence suggests that consuming more calcium from the diet and supplements, either alone or in combination with vitamin D, lowers the risk of developing metabolic syndrome.
  • Vitamin B12 deficiency caused by the drug metformin. Taking calcium supplements might reduce vitamin B12 deficiency caused by the diabetes drug metformin.
  • Kidney disorder of too much protein in the urine (nephrotic syndrome). Taking calcium supplements with vitamin D in children with nephrotic syndrome that is sensitive to steroid treatment does not improve bone mineral density or prevent a flare of nephrotic syndrome.
  • Ulcers in the lining of the mouth. Evidence suggests that using a mouth rinse containing calcium phosphate (Caphosol, EUSA Pharma) in combination with fluoride treatments reduces the duration of pain in people with mouth ulcers due to stem cell transplants.
  • Ovarian cancer. The effect of calcium on the risk of developing ovarian cancer is unclear. Early research suggests that high blood levels of calcium or a high intake of calcium from the diet are linked to a reduced risk of ovarian cancer. However, other early research suggests that dietary calcium intake is not linked with the risk of ovarian cancer.
  • Depression after pregnancy (postpartum depression). Early research suggests that taking calcium daily, beginning 11-21 weeks into pregnancy, reduces depression at 12 but not 6 weeks after delivery.
  • Pregnancy-related leg cramps. Early research shows that calcium can help prevent leg cramps in the second half of pregnancy.
  • Prostate cancer. Research about how calcium affects the risk of prostate cancer has shown conflicting results. Some research suggests that taking calcium supplements daily decreases the risk of prostate cancer. However, other research suggests that there is not a link between calcium intake and the risk for developing prostate cancer.
  • Seizures. Early research suggests that calcium might help control seizures resulting from sudden drops in blood levels of calcium.
  • Lyme disease.
  • Other conditions.

More evidence is needed to rate the effectiveness of calcium for these uses.

The bones and teeth contain over 99% of the calcium in the human body. Calcium is also found in the blood, muscles, and other tissue. Calcium in the bones can be used as a reserve that can be released into the body as needed. The concentration of calcium in the body tends to decline as we age because it is released from the body through sweat, skin cells, and waste. In addition, as women age, absorption of calcium tends to decline due to reduced estrogen levels. Calcium absorption can vary depending on race, gender, and age.

Bones are always breaking down and rebuilding, and calcium is needed for this process. Taking extra calcium helps the bones rebuild properly and stay strong.

Calcium is LIKELY SAFE for most people when taken by mouth or when given intravenously (by IV) and appropriately. Calcium can cause some minor side effects such as belching or gas.

Calcium is POSSIBLY UNSAFE for both adults and children when taken by mouth in high doses. Avoid taking too much calcium. The Institute of Medicine sets the daily tolerable upper intake level (UL) for calcium based on age as follows: Age 0-6 months, 1000 mg; 6-12 months, 1500 mg; 1-8 years, 2500 mg; 9-18 years, 3000 mg; 19-50 years, 2500 mg; 51+ years, 2000 mg. Higher doses increase the chance of having serious side effects, such as blood levels of calcium that are too high and milk-alkali syndrome, a condition that can lead to renal stones, kidney failure and death. There is also concern that supplemental calcium can increase the risk of heart attack. Some research shows that taking calcium, often in amounts over the recommended daily intake level of 1000-1300 mg per day, is linked with an increased risk of heart attack in older people. But other research suggests there is no connection between calcium supplementation and heart attack risk. It may be that some groups have an increased risk while others do not. Continue consuming adequate amounts of calcium to meet daily requirements, but avoid excessive amounts of calcium. Be sure to consider total calcium intake from both dietary and supplemental sources and try not to exceed 1000-1200 mg of calcium per day. To figure out dietary calcium, count 300 mg/day from non-dairy foods plus 300 mg/cup of milk or fortified orange juice. Also, if calcium supplements need to be taken along with dietary calcium, consider taking ones that provide calcium along with vitamin D.

Special Precautions & Warnings:

Pregnancy and breast-feeding: Calcium is LIKELY SAFE when taken by mouth in recommended amounts during pregnancy and breast-feeding. There is not enough information available on the safety of using calcium intravenously (by IV) during pregnancy and breastfeeding. Calcium is POSSIBLY UNSAFE for women who are pregnant when taken by mouth in high doses. The Institute of Medicine sets the same daily tolerable upper intake level (UL) for calcium for all women based on age whether they are pregnant or not: 9-18 years, 3000 mg; 19-50 years, 2500 mg. Higher doses might cause high levels of phosphorous and low levels of parathyroid hormone in the infant during pregnancy and at birth which might increase the risk of seizures in the infant. Be sure to avoid excessive amounts of calcium during pregnancy. Be sure to consider total calcium intake from both dietary and supplemental sources of calcium including over-the-counter antacids. Try not to exceed 1000-1200 mg of calcium per day unless prescribed by your doctor. Some women may be prescribed calcium to prevent high blood pressure during pregnancy. To figure out dietary calcium, count 300 mg/day from non-dairy foods plus 300 mg/cup of milk or fortified orange juice.

Low acid levels in the stomach (achlorhydria). People with low levels of gastric acid absorb less calcium if calcium is taken on an empty stomach. However, low acid levels in the stomach do not appear to reduce calcium absorption if calcium is taken with food. Advise people with achlorhydria to take calcium supplements with meals.

High levels of phosphate in the blood (hyperphosphatemia) or low levels of phosphate in the blood (hypophosphatemia): Calcium and phosphate have to be in balance in the body. Taking too much calcium can throw this balance off and cause harm. Don’t take extra calcium without your health provider’s supervision.

Under-active thyroid (hypothyroidism): Calcium can interfere with thyroid hormone replacement treatment. Separate calcium and thyroid medications by at least 4 hours.

Too much calcium in the blood (as in parathyroid gland disorders and sarcoidosis): Calcium should be avoided if you have one of these conditions.

Poor kidney function: Calcium supplementation can increase the risk of having too much calcium in the blood in people with poor kidney function.

Smoking: People who smoke absorb less calcium from the stomach.

Stroke: Early research suggests that older women who have had a stroke, taking calcium supplements for 5 or more years might increase the chance of developing dementia. More research is needed to determine if calcium supplements should be avoided for those who have had a stroke.

Aluminum salts

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Calcium citrate can increase how much aluminum your body absorbs when taken with aluminum hydroxide. This increase in aluminum levels might become toxic in people with kidney disease. However, not all forms of calcium cause this effect. Calcium acetate does not appear to increase aluminum absorption.

Antibiotics (Quinolone antibiotics)

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Calcium might decrease how well some antibiotics work. In the gut, calcium binds to antibiotics known as “quinolones .” This can decrease the amount of these drugs that your body absorbs. To avoid this interaction, take these drugs at least 2 hours before or 4 to 6 hours after calcium .

Some quinolone antibiotics include ciprofloxacin (Cipro), gemifloxacin (Factive), levofloxacin , moxifloxacin (Avelox), and others.

Antibiotics (Tetracycline antibiotics)

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Calcium might decrease how well some antibiotics work. In the gut, calcium binds to antibiotics known as “tetracyclines .” This can decrease the amount of these drugs that your body absorbs. To avoid this interaction, take these drugs at least 2 hours before or 4 to 6 hours after calcium.

Some tetracycline antibiotics include doxycycline (Vibramycin), minocycline (Minocin), tetracycline (Achromycin V), and others .

Bisphosphonates

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Calcium can decrease how much bisphosphate your body absorbs. Taking calcium along with bisphosphates can decrease the effectiveness of bisphosphate. To avoid this interaction, take bisphosphonate at least 30 minutes before calcium or, preferably, at a different time of day.

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

Calcipotriene (Dovonex)

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Calcipotriene (Dovonex) is a drug that is similar to vitamin D. Vitamin D helps your body absorb calcium. Taking calcium supplements along with calcipotriene (Dovonex) might cause the body to have too much calcium.

Ceftriaxone (Rocephin)

Interaction Rating = Major Do not take this combination.

Administering intravenous ceftriaxone (Rocephin) and calcium can result in life-threatening damage to the lungs and kidneys. Calcium should not be administered intravenously within 48 hours of intravenous ceftriaxone (Rocephin).

Digoxin (Lanoxin)

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Calcium can affect your heart. Digoxin (Lanoxin) is used to help your heart beat stronger. Taking calcium along with digoxin (Lanoxin) might increase the effects of digoxin (Lanoxin) and lead to an irregular heartbeat. If you are taking digoxin (Lanoxin), talk to your doctor before taking calcium supplements.

Diltiazem (Cardizem, Dilacor, Tiazac)

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Calcium can affect your heart. Diltiazem (Cardizem, Dilacor, Tiazac) can also affect your heart. Taking large amounts of calcium along with diltiazem (Cardizem, Dilacor, Tiazac) might decrease the effectiveness of diltiazem (Cardizem, Dilacor, Tiazac).

Dolutegravir (Tivicay)

Interaction Rating = Major Do not take this combination.

Dolutegravir (Tivicay) is a drug used to treat HIV. Taking calcium along with dolutegravir (Tivicay) can reduce blood levels of dolutegravir (Tivicay). Theoretically, this might decrease the effects of dolutegravir (Tivicay). To avoid this interaction, dolutegravir (Tivicay) should be taken 2 hours before or 6 hours after taking calcium.

Elvitegravir (Vitekta)

Interaction Rating = Major Do not take this combination.

Elvitegravir (Vitekta) is a drug used to treat HIV. Taking calcium along with elvitegravir (Vitekta) can reduce blood levels of elvitegravir (Vitekta). Theoretically, this might decrease the effects of elvitegravir (Vitekta). To avoid this interaction, elvitegravir (Vitekta) should be taken 2 hours before or 2 hours after taking calcium.

Estrogens

Interaction Rating = Minor Be watchful with this combination.
Talk with your health provider.

Estrogen helps your body absorb calcium. Taking estrogen pills along with large amounts of calcium might increase calcium in the body too much.

Levothyroxine

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Levothyroxine is used for low thyroid function. Calcium can decrease how much levothyroxine your body absorbs. Taking calcium along with levothyroxine might decrease the effectiveness of levothyroxine. Levothyroxine and calcium should be taken at least 4 hours apart.

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

Lithium

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Long-term lithium use can increase calcium levels in the blood. Taking lithium with calcium supplements might increase this risk of calcium levels becoming too high.

Medications for high blood pressure (Calcium channel blockers)

Interaction Rating = Minor Be watchful with this combination.
Talk with your health provider.

Calcium channel blockers are a type of medicine used for high blood pressure. Calcium may decrease the effects of calcium channel blockers when given by IV. However, there is no evidence that taking calcium supplements or consuming foods containing calcium affects calcium channel blockers.

Some medications for high blood pressure include nifedipine (Adalat, Procardia), verapamil (Calan, Isoptin, Verelan), diltiazem (Cardizem), isradipine (DynaCirc), felodipine (Plendil), amlodipine (Norvasc), and others.

Raltegravir (Isentress)

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Raltegravir (Isentress) is a drug used to treat HIV. Taking calcium along with raltegravir (Isentress) for several months might reduce blood levels of raltegravir (Isentress) and decrease its effects. Taking a single dose of calcium along with raltegravir (Isentress) does not appear to affect blood levels of raltegravir (Isentress).

Sotalol (Betapace)

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Taking calcium with sotalol (Betapace) can decrease how much sotalol (Betapace) your body absorbs. Taking calcium along with sotalol (Betapace) might decrease the effectiveness of sotalol (Betapace). To avoid this interaction, take calcium at least 2 hours before or 4 hours after taking sotalol (Betapace).

Verapamil (Calan, Covera, Isoptin, Verelan)

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Calcium can affect your heart. Verapamil (Calan, Covera, Isoptin, Verelan) can also affect your heart. Do not take large amounts of calcium if you are taking verapamil (Calan, Covera, Isoptin, Verelan).

Water pills (Thiazide diuretics)

Interaction Rating = Moderate Be cautious with this combination.
Talk with your health provider.

Some “water pills” increase the amount of calcium in your 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).

Iron

Calcium supplements can decrease the absorption of dietary iron. In people who have enough iron stored in their bodies, taking calcium does not cause a problem over the long term. However, people at high risk for iron deficiency should take calcium supplements at bedtime, instead of with meals, to avoid reducing dietary iron absorption.

Lycopene

Taking calcium together with lycopene may decrease the amount of lycopene that is absorbed from the gut. To avoid this interaction, people should take calcium supplements at bedtime instead of with meals.

Lysine

Lysine can increase how much calcium the body absorbs. This can increase the amount of calcium in the body. In theory, taking lysine along with calcium might cause calcium levels to become too high.

Magnesium

Calcium supplements can decrease the absorption of dietary magnesium, but only at very high doses (2600 mg per day). However, in people who have enough magnesium stored in their bodies, taking calcium does not cause a problem over the long term. People at high risk for magnesium deficiency, however, should take calcium supplements at bedtime, instead of with meals, to avoid reducing dietary magnesium absorption.

Prebiotics

Taking prebiotics or probiotics along with calcium might increase the absorption of calcium.

Probiotics

Taking prebiotics or probiotics along with calcium might increase the absorption of calcium.

Vitamin D

Taking vitamin D along with calcium increases absorption of calcium. This might increase the risk of calcium levels becoming too high in some people.

Caffeine

High caffeine intake from foods and beverages causes the body to remove calcium. Taking more than 300 mg of caffeine per day (three to four cups of coffee, or six 12-oz. cola drinks) is linked to increased bone loss and breaks in elderly women, especially when calcium intake is low. Be sure to get the amount of calcium from food and supplements that is recommended for your age and gender.

Fiber

Dietary fiber from certain sources can interfere with calcium absorption. These sources include wheat bran, spinach, rhubarb, and others. It’s best not to eat fibrous foods within two hours of taking calcium supplements.

Iron

Calcium supplements may decrease the absorption of dietary iron. However, in people who have enough iron stored in their body, taking calcium does not cause a problem over the long term. People who are at high risk for iron deficiency should take calcium supplements at bedtime, instead of with meals, to avoid reducing the absorption of iron.

Magnesium

Calcium supplements may decrease the absorption of dietary magnesium. However, in people who have enough magnesium stored in their body, taking calcium does not cause a problem over the long term. People who are at high risk for magnesium deficiency should take calcium supplements at bedtime, instead of with meals, to avoid reducing the absorption of magnesium.

Prebiotics

Taking prebiotics or probiotics along with calcium might increase the absorption of calcium.

Probiotics

Taking prebiotics or probiotics along with calcium might increase the absorption of calcium.

Protein

Eating high-protein diets, particularly from animal sources, might increase how much calcium is excreted in the urine. Eating a low-protein diet might reduce how much calcium is absorbed in the stomach.

Sodium

Eating foods that contain a lot of sodium causes the body to remove calcium. A calcium intake of 1000 mg/day is needed to prevent bone loss in postmenopausal women ingesting 2000 mg sodium chloride daily. About 1500 mg/day calcium is needed if sodium chloride intake is 3000 mg/day.

Zinc

Calcium supplements may decrease the absorption of dietary zinc. However, in people who have enough zinc stored in their body, taking calcium does not cause a problem over the long term. People who are at high risk for zinc deficiency should take calcium supplements at bedtime, instead of with meals, to avoid reducing the absorption of zinc.

Acétate de Calcium, Aspartate de Calcium, Bone Meal, Calcio, Calcium Acetate, Calcium Aspartate, Calcium Carbonate, Calcium Chelate, Calcium Chloride, Calcium Citrate, Calcium Citrate Malate, Calcium D-Gluconate, Calcium Disuccinate, Calcium Gluconate, Calcium Glycerophosphate, Calcium Hydrogen Phosphate, Calcium Hydroxyapatite, Calcium Lactate, Calcium Lactogluconate, Calcium Orotate, Calcium Phosphate, Calcium Sulfate, Carbonate de Calcium, Chélate de Calcium, Chlorure de Calcium, Citrate de Calcium, Citrate Malate de Calcium, Coquilles d’Huîtres Moulues, Coquilles d’œuf, Dicalcium Phosphate, Di-Calcium Phosphate, Dolomite, Egg Shell Calcium, Gluconate de Calcium, Glycérophosphate de Calcium, Heated Oyster Shell-Seaweed Calcium, Hydroxyapatite, Lactate de Calcium, Lactogluconate de Calcium, MCHA, MCHC, Microcrystalline Hydroxyapatite, Orotate de Calcium, Ossein Hydroxyapatite, Oyster Shell, Oyster Shell Calcium, Phosphate de Calcium, Phosphate de Calcium Hydrogène, Phosphate de di-Calcium, Phosphate Tricalcium, Poudre d’os, Sulfate de Calcium, Tricalcium Phosphate.


 

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