Calcium and calcium supplements: Achieving the right ...

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Calcium and calcium supplements: Achieving the right balance

Calcium is important for bone health. See how much you need and how to get it.

By Mayo Clinic Staff

Calcium is important for bone health throughout your life. Although diet is the best way to get calcium, calcium supplements may be an option if your diet falls short.

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.

The benefits of calcium

Your body needs calcium to build and maintain strong bones. Your heart, muscles and nerves also need calcium to function properly.

Some studies suggest that calcium, along with vitamin D, may have benefits beyond bone health: perhaps protecting against cancer, diabetes and high blood pressure. But evidence about such health benefits is not definitive.

The risks of too little calcium

If you don't get enough calcium, you could face health problems related to weak bones:

• Children may not reach their full potential adult height.
• Adults may have low bone mass, which is a risk factor for osteoporosis.

Many Americans don't get enough calcium in their diets. Children and adolescents are at risk, but so are adults age 50 and older.

Calcium requirements

How much calcium you need depends on your age and sex.

Calcium: Recommended daily amount Men   19-50 years 1,000 mg 51-70 years 1,000 mg 71 and older 1,200 mg Women   19-50 years 1,000 mg 51 and older 1,200 mg

The recommended upper limit for calcium is 2,500 mg a day for adults 19 to 50. For those 51 and older, the limit is 2,000 mg a day.

Calcium and diet

Your body doesn't produce calcium, so you must get it through other sources. Calcium can be found in a variety of foods, including:

• Dairy products, such as cheese, milk and yogurt
• Dark green leafy vegetables, such as broccoli and kale
• Fish with edible soft bones, such as sardines and canned salmon
• Calcium-fortified foods and beverages, such as soy products, cereal and fruit juices, and milk substitutes

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. You can also get vitamin D from fortified foods and sun exposure. The RDA for vitamin D is 600 international units (15 micrograms) a day for most adults.

Who should consider calcium supplements?

Even if you eat a healthy, balanced diet, you may find it difficult to get enough calcium if you:

• Follow a vegan diet
• Have lactose intolerance and limit dairy products
• Consume large amounts of protein or sodium, which can cause your body to excrete more calcium
• Are receiving long-term treatment with corticosteroids
• Have certain bowel or digestive diseases that decrease your ability to absorb calcium, such as inflammatory bowel disease or celiac disease

In these situations, calcium supplements may help you meet your calcium requirements. Talk with your doctor or dietitian about whether calcium supplements are right for you.

Do calcium supplements have risks?

Calcium supplements aren't for everyone. For instance, if you have a health condition that causes excess calcium in your bloodstream (hypercalcemia), you should avoid calcium supplements.

It's not definitive, but there may be a link between high-dose calcium supplements and heart disease. The evidence is mixed and more research is needed before doctors know the effect calcium supplements may have on heart attack risk.

A similar controversy surrounds calcium and prostate cancer. 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.

Until more is known about these possible risks, it's important to be careful to avoid excessive amounts of calcium. As with any health issue, it's important to talk to your doctor to determine what's right for you.

Types of calcium supplements

Several different kinds of calcium compounds are used in calcium supplements. Each compound contains varying amounts of calcium &#; referred to as elemental calcium. Common calcium supplements may be labeled as:

• Calcium carbonate (40% elemental calcium)
• Calcium citrate (21% elemental calcium)
• Calcium gluconate (9% elemental calcium)
• Calcium lactate (13% elemental calcium)

The two main forms of calcium supplements are carbonate and citrate. Calcium carbonate is cheapest and therefore often a good first choice. Other forms of calcium in supplements include gluconate and lactate.

In addition, some calcium supplements are combined with vitamins and other minerals. For instance, some calcium supplements may also contain vitamin D or magnesium. Check the ingredient list to see which form of calcium your calcium supplement is and what other nutrients it may contain. This information is important if you have any health or dietary concerns.

Choosing calcium supplements

When looking at calcium supplements, consider these factors:

Amount of calcium

Elemental calcium is important because it's the actual amount of calcium in the supplement. It's what your body absorbs for bone growth and other health benefits. The Supplement Facts label on calcium supplements is helpful in determining how much calcium is in one serving. As an example, calcium carbonate is 40% elemental calcium, so 1,250 milligrams (mg) of calcium carbonate contains 500 mg of elemental calcium. Be sure to note the serving size (number of tablets) when determining how much calcium is in one serving.

Tolerability

Calcium supplements cause few, if any, side effects. But side effects can sometimes occur, including gas, constipation and bloating. In general, calcium carbonate is the most constipating. You may need to try a few different brands or types of calcium supplements to find one that you tolerate the best.

What prescriptions you take

Calcium supplements can interact with many different prescription medications, including blood pressure medications, synthetic thyroid hormones, bisphosphonates, antibiotics and calcium channel blockers. Depending on your medications, you may need to take the supplement with your meals or between meals. Ask your doctor or pharmacist about possible interactions and which type of calcium supplement would work for you.

Quality and cost

Manufacturers are responsible for ensuring that supplements are safe and claims are truthful. Some companies have their products independently tested by U.S. Pharmacopeial Convention (USP), ConsumerLab.com (CL) or NSF International. Supplements that bear the USP, CL or NSF abbreviation meet voluntary industry standards for quality, purity, potency, and tablet disintegration or dissolution. Different types of calcium supplements have different costs. Comparison shop if cost is a factor for you.

Supplement form

Calcium supplements are available in a variety of forms, including tablets, capsules, chews, liquids and powders. If you have trouble swallowing pills, you may want a chewable or liquid calcium supplement.

Absorbability

Your body must be able to absorb the calcium for it to be effective. All varieties of calcium supplements are better absorbed when taken in small doses (500 mg or less) at mealtimes. Calcium citrate is absorbed equally well when taken with or without food and is a form recommended for individuals with low stomach acid (more common in people over 50 or taking acid blockers), inflammatory bowel disease or absorption disorders.

Contact us to discuss your requirements of Light Calcium Carbonate. Our experienced sales team can help you identify the options that best suit your needs.

More isn't always better: Too much calcium has risks

Dietary calcium is generally safe, but more isn't necessarily better, and excessive calcium doesn't provide extra bone protection.

If you take calcium supplements and eat calcium-fortified foods, you may be getting more calcium than you realize. Check food and supplement labels to monitor how much total calcium you're getting a day and whether you're achieving the RDA but not exceeding the recommended upper limit. Be sure to tell your doctor if you're taking calcium supplements.

 

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1. Calcium and vitamin D: Important at every age. National Institutes of Health. https://www.bones.nih.gov/health-info/bone/bone-health/nutrition/calcium-and-vitamin-d-important-every-age. Accessed Oct. 18, .
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3. Calcium fact sheet for professionals. Office of Dietary Supplements. https://ods.od.nih.gov/factsheets/Calcium-HealthProfessional/. Accessed Oct. 18, .
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5. - Dietary Guidelines for Americans. U.S. Department of Health and Human Services and U.S. Department of Agriculture. https://health.gov/our-work/food-nutrition/--dietary-guidelines/guidelines/introduction/dietary-guidelines-for-americans/. Accessed Oct. 18, .
6. Dietary Guidelines Advisory Committee. Scientific report of the Dietary Guidelines Advisory Committee: Advisory report to the Secretary of Agriculture and the Secretary of Health and Human Services. U.S. Department of Agriculture, Agricultural Research Service. https://www.dietaryguidelines.gov/-advisory-committee-report. Accessed Oct. 18, .
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10. What is third-party certification? NSF International. https://www.nsf.org/about-nsf/what-is-third-party-certification. Accessed Oct. 18, .

See more In-depth

What is this medication?

CALCIUM CARBONATE (KAL see um KAR bon ate) treats heartburn, indigestion, upset stomach, or other conditions caused by too much stomach acid. It works by reducing the amount of acid in the stomach. It belongs to a group of medications called antacids. It may also be used to increase calcium levels in your body. Calcium is a mineral that plays an important role in building strong bones and maintaining heart health.

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This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

What should I tell my care team before I take this medication?

They need to know if you have any of these conditions:

• Constipation
• Dehydration
• High blood calcium levels
• Kidney disease
• Stomach bleeding, obstruction or ulcer
• An unusual or allergic reaction to calcium carbonate, other medications, foods, dyes, or preservatives
• Pregnant or trying to get pregnant
• Breast-feeding

How should I use this medication?

Take this medication by mouth with a glass of water. Follow the directions on the label. Antacids are usually taken after meals and at bedtime, or as directed by your care team. Take your medication at regular intervals. Do not take your medication more often than directed.

Talk to your care team regarding the use of this medication in children. While this medication may be used in children for selected conditions, precautions do apply.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medication?

Do not take this medication with any of the following:

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• Ammonium chloride
• Methenamine

This medication may also interact with the following:

• Antibiotics like ciprofloxacin, tetracycline
• Captopril
• Delavirdine
• Gabapentin
• Iron supplements
• Medications for fungal infections like ketoconazole and itraconazole
• Medications for seizures like ethotoin and phenytoin
• Mycophenolate
• Quinidine
• Rosuvastatin
• Sucralfate
• Thyroid medication

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

Tell your care team if your symptoms do not start to get better or if they get worse. Do not treat yourself for stomach problems with this medication for more than 2 weeks. See a doctor if you have black tarry stools, rectal bleeding, or if you feel unusually tired. Do not change to another antacid product without advice.

If you are taking other medications, leave an interval of at least 2 hours before or after taking this medication.

To help reduce constipation, drink several glasses of water a day.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible:

• Allergic reactions&#;skin rash, itching, hives, swelling of the face, lips, tongue, or throat
• High calcium levels&#;increased thirst or amount of urine, nausea, vomiting, confusion, unusual weakness or fatigue, bone pain

Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):

• Burping
• Constipation
• Gas

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-.

Where should I keep my medication?

Keep out of the reach of children and pets.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medication after the expiration date.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

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