Published Jul 06, 2026 | 7:00 AM ⚊ Updated Jul 06, 2026 | 7:00 AM
People are advised to meet their calcium requirements through calcium-rich foods rather than tablets.
Synopsis: The Endocrine Society of India has issued its first consensus guidance on calcium intake for the Indian population, urging people to meet their daily calcium needs mainly through food and use supplements only when diet is inadequate or physiological needs are higher. The guidance recommends assessing dietary calcium intake before prescribing supplements, identifies preferred calcium formulations when supplementation is needed, and advises correcting vitamin D deficiency to improve calcium absorption.
With more than half of Indians consuming less calcium than recommended, the Endocrine Society of India (ESI) has released its first consensus guidance tailored to the country’s dietary patterns, urging people to meet their calcium needs primarily through food and use supplements only when dietary intake falls short.
Published in the Indian Journal of Endocrinology and Metabolism, the consensus statement says low dietary diversity, limited dairy consumption, cereal-based diets and widespread vitamin D deficiency have left a large section of Indians at risk of inadequate calcium intake.
The expert panel recommends assessing dietary calcium intake before prescribing supplements and encourages consumption of calcium-rich foods such as milk, curd, cheese, ragi, sesame seeds, pulses and green leafy vegetables.
Supplements should be reserved for people who cannot meet the recommended dietary allowance (RDA) through diet or have higher physiological requirements.
“In several countries, including India, dietary calcium intake is poor, and it is necessary to ensure adequate calcium intake for optimizing musculoskeletal health,” the authors write.
The task force asks doctors to assess dietary intake before they prescribe supplements. It points people towards food that contains calcium rather than tablets.
“We suggest assessing calcium intake through diet recall and encourage the consumption of calcium-rich foods, particularly dairy products, to meet the RDA,” the guidance states.
The panel names milk, curd, cheese, ragi, sesame seeds, pulses and green leafy vegetables as sources people can turn to. It notes that 200 ml of cow milk supplies around 250 mg of calcium, while 100 g of ragi supplies 344 mg.
“The statement emphasizes that food sources should be the preferred modality of meeting calcium needs, and supplements should be used when dietary intake is insufficient or when physiological demands are higher, such as in pregnancy, lactation, or after menopause,” the authors state.
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Adults need 1,000 mg of calcium daily, according to the guidance. That figure rises to 1,200 mg for mothers during the first year of lactation.
Teenagers aged 16 to 18 need 1,050 mg a day, the highest requirement across any group covered in the document.
“We advise that daily calcium intake follow the recommended dietary allowance (RDA) across all age groups,” the panel states.
The panel names pregnancy, lactation and the years after menopause as points where the body demands more calcium than usual.
“If dietary intake cannot meet the RDA, we recommend calcium supplementation in conditions where physiological demand is high, such as pregnancy, lactation, and after menopause,” the guidance states. “We also encourage supplementation whenever the RDA of calcium cannot be met by diet alone.”
The panel extends this to people who live with osteoporosis, osteomalacia, rickets or hypoparathyroidism.
“We recommend supplementation in pathological conditions that require optimal calcium intake, including osteoporosis, osteomalacia, rickets, and hypoparathyroidism,” the authors write.
It also covers people whose bodies struggle to absorb calcium.
“We recommend supplementation in conditions that limit dietary calcium intake, such as lactose intolerance, or disorders that reduce calcium absorption, such as malabsorption syndromes,” the guidance notes.
The panel names two supplements as the preferred choices: calcium carbonate and calcium citrate.
“The selection of an appropriate calcium preparation should take into account its bioavailability, optimal timing of administration, the clinical context, associated comorbidities, and cost considerations,” the guidance states. “Calcium carbonate and calcium citrate are the two most commonly used preparations when pharmacological supplementation is necessary.”
Calcium carbonate holds 40 percent elemental calcium and works best after meals, since it depends on stomach acid to dissolve. The panel calls it the option that costs least.
Calcium citrate holds 21 percent elemental calcium. The panel points people who take acid-suppressing medication, people with reduced stomach acid, and people with kidney stones towards this form instead.
“We recommend calcium citrate tablets for individuals on proton-pump inhibitors or with achlorhydria and in patients with renal stone disease,” the guidance states. “Calcium citrate can be taken irrespective of meals, although multiple tablets are often needed to meet daily requirements.”
The panel steers people away from other calcium salts altogether.
“We do not recommend calcium supplements containing other salts due to higher cost, the need for multiple doses (in the absence of slow-release preparations), and the absence of evidence supporting their routine use,” it states.
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The panel treats vitamin D as a companion to calcium, since the body needs it to absorb calcium properly.
“We recommend correcting associated vitamin D deficiency to ensure optimal calcium absorption,” the guidance states. “We advise against injectable vitamin D unless a malabsorptive disorder is present.”
It sets a target of 1,000 to 2,000 IU daily, or 60,000 IU once a month.
“We recommend maintaining a daily vitamin D intake of 1000–2000 units through daily or 60,000 units monthly supplementation,” the panel writes.
The guidance steers doctors away from activated forms of vitamin D, such as calcitriol, outside a small set of conditions.
“We recommend against using calcium supplements that contain active forms of vitamin D, such as calcitriol or alphacalcidol, except in chronic kidney disease (CKD), hypoparathyroidism, or genetic disorders like vitamin D-dependent rickets,” the guidance states.
The panel addresses a question that has followed calcium supplements for years: do they raise heart risk?
It draws a line between calcium eaten through food, which the evidence does not link to harm, and calcium taken in pill form over years, which may carry some risk.
“Individuals with coronary artery disease or other forms of CVD should be encouraged to maintain calcium intake at the RDA through dietary or additional supplementation if necessary,” the guidance states. “Intake above 2000 mg per day should be avoided as higher doses may increase the risk of coronary and vascular calcification.”
The panel asks people who have kidney stones to meet the RDA through food where they can.
“We suggest maintaining the RDA of calcium through dietary sources in individuals with active or past renal stone disease,” it states. “If supplementation is required to achieve a total intake of 1000–1200 mg/day, administer calcium supplements with meals and monitor for stone recurrence.”
For people with chronic kidney disease, the panel sets a target of 800 to 1,000 mg a day, met through food where possible.
“We recommend a daily calcium intake of 800–1000 mg in individuals with CKD to maintain calcium in the normal reference range,” the guidance states. “We suggest optimizing calcium intake primarily through diet, while balancing phosphate restrictions.”
The panel positions calcium and vitamin D as support for osteoporosis drugs rather than a replacement for them.
“Calcium and vitamin D should be used as adjuncts to osteoporosis therapies,” the guidance states.
The panel flags medication that calcium tablets can interfere with, including antibiotics, iron supplements and thyroid medication.
“Several medications can cause hypocalcaemia, and calcium tablets can impair absorption of agents, such as quinolones, tetracyclines, iron, dolutegravir, and levothyroxine, which should be appropriately time-separated when co-administered,” the guidance states.
It sets gaps of two hours before or six hours after calcium for antibiotics, iron and dolutegravir, and a gap of four hours for levothyroxine.
The guidance closes on a line that sums up its stance on dosage.
“Elemental calcium supplementation greater than 1000 mg/day and forms with active vitamin D should be discouraged in the absence of specific indications,” the authors write.
