How To Treat Calcium Deficiency

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How to recognize the signs and symptoms of calcium deficiency and treat it effectively

Calcium deficiency is relatively common but can be hard to pinpoint. How do you know if you lack calcium? Calcium deficiency can cause diverse health issues: tingling in the hands and feet, muscle aches, irregular heartbeat, fatigue, and even memory loss. Learn how to spot the signs and symptoms of low blood calcium levels

What’s calcium deficiency disease?

Calcium is a vital mineral. Your body uses it to build strong bones and teeth. Calcium is also needed for your heart and other muscles to function properly. When you don’t get enough calcium, you increase your risk of developing disorders like:

  • osteoporosis
  • osteopenia
  • calcium deficiency disease (hypocalcemia)

Children who don’t get enough calcium may not grow to their full potential height as adults.

You should consume the recommended amount of calcium per day through the food you eat, supplements, or vitamins.

Signs and symptoms of calcium deficiency

Symptoms of calcium deficiency are more evident as time goes on, but there are some initial signs. According to Bansari Acharya, a registered dietitian-nutritionist in Detroit, Michigan, calcium deficiency can cause symptoms like:

  • Muscle spasms
  • Cramps
  • Muscle aches and pains

According to Jinan Banna, PhD, a registered dietitian, and professor of nutrition at the University of Hawai’i at Mānoa, long-term calcium deficiency can cause:

  • Irregular heartbeats
  • Osteopenia
  • Osteoporosis
  • An increased risk of bone fractures
  • Hypocalcemia

“When we do not get enough calcium from our diet, our bones correct the deficit by releasing calcium back into our blood and body fluids,” says Rashid. “When this occurs regularly, over time, it can contribute to low bone mass, osteopenia, and osteoporosis. All of these conditions increase risk of fracture.”

Causes of calcium deficiency

There are a few ways to become calcium deficient, but the most common one is through a low-calcium diet. The daily recommended intake of calcium varies by gender and age:

  • Infants 0-6 months: 200 mg
  • Infants 7-12 months: 260 mg
  • Children 1-3 years: 700 mg
  • Children 4-8 years: 1,000 mg
  • Adolescents 9-18 years: 1,300 mg
  • Adults 19-50 years: 1,000 mg
  • Males 50-70 years: 1,000 mg
  • Females over 50 years: 1,200 mg
  • Adults over 71 years: 1,200 mg

While calcium is available in various foods, there are many reasons someone may be lacking in it. The following people are at an increased risk of calcium deficiency:

  • Vegetarians and vegans may consume less calcium from their diet, especially vegans, as they avoid dairy.
  • Lactose intolerant people are unable to tolerate dairy — a large source of calcium. They, therefore, avoid it.
  • Post-menopausal women, because a decrease in estrogen production can reduce the absorption of calcium.

Calcium deficiency can also occur in newborns, although the symptoms and causes are different. This is called neonatal hypocalcemia.

What causes hypocalcemia?

Many people are at an increased risk for calcium deficiency as they age. This deficiency may be due to a variety of factors, including:

  • poor calcium intake over a long period of time, especially in childhood
  • medications that may decrease calcium absorption
  • dietary intolerance to foods rich in calcium
  • hormonal changes, especially in women
  • certain genetic factors

It’s important to ensure proper calcium intake at all ages.

For children and teenagers, the recommended daily allowances for calcium are the same for both sexes. According to the National Institutes of Health (NIH)Trusted Source, the daily allowances are:

Age group Daily recommended dietary allowance (RDA)
Children, 9-18 years 1,300 mg
Children, 4-8 years 1,000 mg
Children, 1-3 years 700 mg
Children, 7-12 months 260 mg
Children, 0-6 months 200 mg

According to the U.S. government’s dietary guidelinesTrusted Source, calcium requirements for adults are:

Group Daily recommended dietary allowance (RDA)
Women, 71 years and up 1,200 mg
Women, 51-70 years 1,200 mg
Women, 31-50 years 1,000 mg
Women, 19-30 years 1,000 mg
Men, 71 years and up 1,200 mg
Men, 51-70 years 1,000 mg
Men, 31-50 years 1,000 mg
Men, 19-30 years 1,000 mg

Women need to increase their calcium intake earlier in life than men, starting in middle age. Meeting the necessary calcium requirement is particularly important as a woman approaches menopause.

During menopause, women should also increase their calcium intake to reduce the risk of osteoporosis and calcium deficiency disease. The decline in the hormone estrogen during menopause causes a woman’s bones to thin faster.

The hormone disorder hypoparathyroidism may also cause calcium deficiency disease. People with this condition don’t produce enough parathyroid hormone, which controls calcium levels in the blood.

Other causes of hypocalcemia include malnutrition and malabsorption. Malnutrition is when you’re not getting enough nutrients, while malabsorption is when your body can’t absorb the vitamins and minerals you need from the food you eat. Additional causes include:

  • low levels of vitamin D, which makes it harder to absorb calcium
  • medications, such phenytoin, phenobarbital, rifampin, corticosteroids, and drugs used to treat elevated calcium levels
  • pancreatitis
  • hypermagnesemia and hypomagnesemia
  • hyperphosphatemia
  • septic shock
  • massive blood transfusions
  • renal failure
  • certain chemotherapy drugs
  • “Hungry bone syndrome,” which may occur after surgery for hyperparathyroidism
  • removal of parathyroid gland tissue as part of surgery to remove the thyroid gland

If you miss your daily dose of calcium, you won’t become calcium deficient overnight. But it’s still important to make an effort to get enough calcium every day, since the body uses it quickly. Vegans are more likely to become calcium deficient quickly because they don’t eat calcium-rich dairy products.

Calcium deficiency won’t produce short-term symptoms because the body maintains calcium levels by taking it directly from the bones. But long-term low levels of calcium can have serious effects.

What are the symptoms of hypocalcemia?

Early stage calcium deficiency may not cause any symptoms. However, symptoms will develop as the condition progresses.

Severe symptoms of hypocalcemia include:

  • confusion or memory loss
  • muscle spasms
  • numbness and tingling in the hands, feet, and face
  • depression
  • hallucinations
  • muscle cramps
  • weak and brittle nails
  • easy fracturing of the bones

Calcium deficiencies can affect all parts of the body, resulting in weak nails, slower hair growth, and fragile, thin skin.

Calcium also plays an important role in both neurotransmitter release and muscle contractions. So, calcium deficiencies can bring on seizures in otherwise healthy people.

If you start experiencing neurological symptoms like memory loss, numbness and tingling, hallucinations, or seizures, make an appointment to see your doctor as soon as possible.

How’s calcium deficiency disease diagnosed?

Contact your doctor if you have symptoms of calcium deficiency disease. They’ll review your medical history and ask you about family history of calcium deficiency and osteoporosis.

If your doctor suspects calcium deficiency, they’ll take a blood sample to check your blood calcium level. Your doctor will measure your total calcium level, your albumin level, and your ionized or “free” calcium level. Albumin is a protein that binds to calcium and transports it through the blood. Sustained low calcium levels in your blood may confirm a diagnosis of calcium deficiency disease.

Normal calcium levels for adults can range from 8.8 to 10.4 milligrams per deciliter (mg/dL), according to the Merck Manual. You may be at risk for calcium deficiency disease if your calcium level is below 8.8 mg/dL. Children and teens typically have higher blood calcium levels than adults.

Neonatal hypocalcemia

Neonatal hypocalcemia occurs in infants soon after birth. Most cases of neonatal hypocalcemia occur within the first two days after birth. But late onset hypocalcemia can occur three days after birth, or later.

Risk factors for infants include being small for their age and maternal diabetes. Late onset hypocalcemia is most often caused by drinking cow’s milk or formula with too much phosphate.

Symptoms of neonatal hypocalcemia include:

  • jitteriness
  • poor feeding
  • seizures
  • apnea, or slowed breathing
  • tachycardia, or a faster than normal heartbeat

Diagnosis is made by testing an infant’s blood for the total calcium level or ionized calcium level. The infant’s glucose level will also be tested to rule out hypoglycemia.

Treatment typically involves giving intravenous calcium gluconate followed by several days of oral calcium supplements.

How’s hypocalcemia treated?

Calcium deficiency is usually easy to treat. It typically involves adding more calcium to your diet.

Do not self-treat by taking a lot of calcium supplements. Taking more than the recommended dose without your doctor’s approval can lead to serious issues like kidney stones.

Commonly recommended calcium supplements include:

  • calcium carbonate, which is the least expensive and has the most elemental calcium
  • calcium citrate, which is the most easily absorbed
  • calcium phosphate, which is also easily absorbed and doesn’t cause constipation

Calcium supplements are available in liquid, tablet, and chewable forms.

Shop for calcium supplements.

It’s important to note that some medications could interact negatively with calcium supplements. These medications include:

  • blood pressure beta-blockers like atenolol, which may decrease calcium absorption if taken within two hours of taking calcium supplements
  • antacids containing aluminum, which may increase blood levels of aluminum
  • cholesterol-lowering bile acid sequestrants such as colestipol, which may decrease calcium absorption and increase the loss of calcium in the urine
  • estrogen medications, which can contribute to an increase in calcium blood levels
  • digoxin, as high calcium levels can increase digoxin toxicity
  • diuretics, which can either increase calcium levels (hydrochlorothiazide) or decrease calcium levels in the blood (furosemide)
  • certain antibiotics such as fluoroquinolones and tetracyclines, whose absorption can be decreased by calcium supplements

Sometimes diet changes and supplements aren’t enough to treat a calcium deficiency. In this case, your doctor may want to regulate your calcium levels by giving you regular calcium injections.

You can expect to see results within the first few weeks of treatment. Severe cases of calcium deficiency disease will be monitored at one- to three-month intervals.

What are the possible complications of hypocalcemia?

Complications from calcium deficiency disease include eye damage, an abnormal heartbeat, and osteoporosis.

Complications from osteoporosis include:

  • disability
  • spinal fractures or other bone fractures
  • difficulty walking

If left untreated, calcium deficiency disease could eventually be fatal.

How can hypocalcemia be prevented?

You can prevent calcium deficiency disease by including calcium in your diet every day.

Be aware that foods high in calcium, such as dairy products, can also be high in saturated fat and trans fat. Choose low-fat or fat-free options to reduce your risk of developing high cholesterol and heart disease.

You can get 1/4 to 1/3 of your RDA of calcium in a single serving of some milks and yogurts. According to the United States Department of Agriculture (USDA)Trusted Source, other calcium-rich foods include:

Food Approximate serving size Amount of calcium per serving
Sardines (in oil) 3.75 oz. 351 mg
Salmon (pink, canned, with bones) 3 oz. 183 mg
Fortified tofu (regular, not firm) 1/3 cup 434 mg
Edamame (frozen) 1 cup 71-98 mg
White beans 1 cup 161 mg
Collard greens (cooked) 1 cup 268 mg
Broccoli (cooked) 1 cup 62 mg
Figs (dried) 5 figs 68 mg
Fortified orange juice 1 cup 364 mg
Wheat bread 1 slice 36 mg

While meeting your calcium requirement is very important, you also want to make sure you’re not getting too much. According to the Mayo Clinic, upper limits of calcium intake in milligrams (mg) for adults are:

  • 2,000 mg per day for men and women 51 years of age and up
  • 2,500 mg per day for men and women 19 to 50 years of age

You might want to supplement your diet by taking a multivitamin. Or your doctor may recommend supplements if you’re at high risk for developing a calcium deficiency.

Multivitamins may not contain all of the calcium you need, so be sure to eat a well-rounded diet. If you’re pregnant, take a prenatal vitamin.

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