Calcium Deficiency: Symptoms, Food Sources and Supplements

Reviewed by Dr Asma

Calcium is famous as the mineral that keeps bones and teeth strong, but your muscles, nerves and heart rely on it every minute of the day. The body cannot make calcium on its own, so it has to come from food or supplements. In Pakistan, many families drink little milk, spend most of the day indoors and enjoy tea far more than dairy, so calcium deficiency is much more common than people think. This guide explains the warning signs, who is at risk, the best food sources and how to choose a supplement wisely.

What does calcium do in the body?

Nearly all of the calcium in your body is stored in bones and teeth. The small amount that circulates in your blood helps muscles contract, lets nerves pass signals, keeps the heartbeat steady and allows blood to clot. When blood calcium drops, the body quietly pulls calcium out of your bones to protect these vital jobs. Over months and years, this slowly weakens the skeleton.

Common symptoms of calcium deficiency

Early deficiency often causes no symptoms at all, which is why it goes unnoticed for so long. When signs do appear, they may include:

• Muscle cramps and spasms, especially in the legs and back
• Numbness or tingling in the fingers, toes or around the mouth
• Constant tiredness and low energy
• Brittle nails, dry skin and thinning hair
• Tooth decay, weak teeth or gum problems
• Bone and joint aches
• In children: slow growth, soft or bowed bones and late teething
• In older adults: fractures after even a small fall

Severe deficiency can cause strong muscle spasms, confusion and an abnormal heart rhythm, and needs urgent medical care. Many of these symptoms overlap with low vitamin D, low magnesium or thyroid problems, so a blood test is the only reliable way to know what is going on.

Who is more likely to be low in calcium?

• Women after menopause, because falling hormones speed up bone loss
• Pregnant and breastfeeding mothers, whose bodies share calcium with the baby
• Growing children and teenagers
• People who avoid dairy or are lactose intolerant
• People who get little sunlight because of indoor jobs or covered clothing
• Heavy tea and cola drinkers
• Anyone with kidney, liver or gut conditions, or on long term steroids or some acid reducing medicines

Best food sources of calcium

Food should always come first. Dairy remains the easiest source: milk, dahi (yoghurt), paneer and cheese. If you avoid dairy, you can still build up your intake with sesame seeds (til), almonds, chickpeas (chana), dried figs (anjeer), small fish eaten with their soft bones, and cereals or juices that are fortified with calcium. Green leafy vegetables such as spinach contain calcium too, but the body absorbs it poorly, so do not rely on them alone.

A few habits help you keep what you eat. Try not to drink strong tea or cola right with meals, because they reduce absorption. Cutting back on very salty foods also helps, since extra salt makes the body lose more calcium in urine.

Do not forget vitamin D

Calcium and vitamin D work as a team. Without enough vitamin D, your gut absorbs only a small share of the calcium you take in, no matter how much milk you drink. Short, regular sun exposure on the face and arms, plus foods like eggs and oily fish, can help. If a test shows you are low, read our guide on vitamin D deficiency symptoms and treatment.

How to choose a calcium supplement

If your doctor advises a supplement, these points make choosing easier:

• Check the form. Calcium carbonate is common and affordable and is best taken with meals. Calcium citrate is absorbed well with or without food and can suit people with low stomach acid.
• Look for vitamin D3. Combination products often include D3 and sometimes K2 to support absorption and bone health.
• Read the elemental calcium. The label shows how much actual calcium you get, which is different from the weight of the compound.
• More is not better. Too much calcium can cause constipation and may raise the risk of kidney stones. Your doctor will tell you how much suits your age and test results.
• Mind the gaps with other medicines. Calcium can interfere with thyroid tablets and some antibiotics, so ask your pharmacist about timing.

At Medimart you can find options such as Nature’s Bounty Calcium 600mg, Neocal Calcium + Vitamin D tablet and Nutrify Calcium + D3 + K2. You can also browse our multivitamins section. Orders above Rs 10,000 qualify for free delivery.

Protecting your bones for the long term

Strong bones are built with regular weight bearing exercise such as walking, climbing stairs and light strength training, along with not smoking and keeping a healthy body weight. If you are over fifty, or a woman past menopause, ask your doctor about a bone density scan. Our article on osteoporosis, calcium needs and treatment explains this in more detail.

When should you see a doctor?

Please see a doctor if you have frequent muscle cramps, tingling around the mouth, repeated fractures, or if your child shows slow growth or soft bones. Go to a hospital urgently for severe spasms, fainting or an irregular heartbeat.

Frequently asked questions

Can I take calcium every day?

Many people do under medical guidance, but the right amount depends on your age, diet and blood tests. Ask your doctor before starting.

Is calcium deficiency the same as vitamin D deficiency?

No. They are different, but they are closely linked because vitamin D helps you absorb calcium.

Which foods give calcium if I do not drink milk?

Sesame seeds, almonds, chickpeas, dried figs, small fish with bones and fortified foods are good alternatives.

Do children need calcium supplements?

Most children get enough from a balanced diet that includes dairy. Give supplements only if a doctor advises it.

Disclaimer: This article is for general information only and is not a substitute for professional medical advice, diagnosis or treatment. Always consult a qualified doctor or pharmacist before starting any supplement or medicine.