Food First, Supplements When Needed: Endocrine Society of India Issues Calcium Supplementation Consensus
India: Food should remain the primary source of calcium. At the same time, supplements should be reserved for individuals with inadequate dietary intake or increased physiological and clinical needs, a new consensus statement issued by the Endocrine Society of India (ESI) Skeletal Health Taskforce has suggested. The recommendations, published in the Indian Journal of Endocrinology and Metabolism, aim to provide evidence-based guidance on the rational use of calcium supplements in the Indian population, where calcium deficiency and vitamin D insufficiency remain widespread.
Dr. Lakshmi Nagendra from the Department of Endocrinology, JSS Medical College, JSS Academy of Higher Education and Research, Mysore, Karnataka, and colleagues developed the consensus statement.
Calcium is essential not only for maintaining bone strength but also for muscle function, cardiovascular health, nerve signaling, blood clotting, and several metabolic processes. However, dietary calcium intake in India is often well below recommended levels because of low dairy consumption, limited dietary diversity, cereal-based diets, and widespread vitamin D deficiency, all of which reduce calcium absorption.
Speaking to Medical Dialogues about the need for an India-specific guidance document, Dr. Lakshmi Nagendra said that the recommendations were developed because global guidelines do not adequately address regions where habitual calcium intake is low.
"The Endocrine Society of India Skeletal Health Taskforce emphasizes that calcium intake should be optimized primarily through dietary sources, with supplementation reserved for individuals whose dietary intake is inadequate or whose physiological or pathological requirements are increased, including pregnancy, lactation, postmenopausal women, osteoporosis, osteomalacia, hypocalcaemic rickets, hypoparathyroidism, and malabsorption states."
The task force recommends assessing dietary calcium intake before prescribing supplements and encouraging affordable calcium-rich foods. Along with milk, curd, and cheese, the statement highlights several Indian food sources such as drumstick leaves, curry leaves, amaranth, broccoli, soybeans, rajma, Bengal gram, sesame seeds, ragi, and bajra. For people who consume little or no dairy, sprouted ragi is suggested as a useful alternative because sprouting improves calcium absorption by reducing phytate content.
The experts stress that supplementation should not become routine but should be guided by individual nutritional status and clinical requirements.
Key recommendations from the consensus statement
- Meet calcium requirements primarily through diet, using supplements only when dietary intake is insufficient.
- Assess dietary calcium intake before initiating supplementation.
- Recommend calcium supplements for individuals with increased physiological needs, including pregnancy, lactation, and postmenopausal women, if diet alone cannot meet the recommended intake.
- Supplement calcium in bone and mineral disorders, including osteoporosis, osteomalacia, hypocalcaemic rickets, and hypoparathyroidism.
- Consider supplementation in people with lactose intolerance or malabsorption disorders that reduce calcium absorption.
- Prefer calcium carbonate or calcium citrate, selecting the preparation based on clinical condition, gastric acidity, comorbidities, patient preference, and cost.
- Correct vitamin D deficiency to improve calcium absorption and avoid routine use of active vitamin D analogues such as calcitriol unless specifically indicated.
- Individualize calcium therapy in patients with cardiovascular disease, kidney stones, and chronic kidney disease rather than avoiding supplementation altogether.
- Maintain total calcium intake within recommended limits and avoid excessive elemental calcium intake above 1,000 mg/day from supplements unless clinically indicated.
- Separate calcium supplements from medications such as iron, levothyroxine, tetracyclines, quinolones, and dolutegravir to prevent drug interactions.
Addressing common misconceptions regarding supplementation, Dr. Nagendra emphasized that calcium should not be indiscriminately avoided in patients with cardiovascular disease or chronic kidney disease.
"Rather than avoiding calcium supplementation in cardiovascular disease or chronic kidney disease, clinicians should aim to achieve the recommended total calcium intake while avoiding excess. In chronic kidney disease, maintaining a neutral calcium balance with a total intake of 800–1000 mg/day is recommended."
The consensus recommends maintaining vitamin D sufficiency with 1,000–2,000 IU daily or 60,000 IU monthly, while avoiding injectable vitamin D except in malabsorption disorders. Active vitamin D analogues should be reserved for conditions such as chronic kidney disease, hypoparathyroidism, and vitamin D-dependent rickets. It also recommends calcium and vitamin D as adjuncts to osteoporosis therapy to improve treatment outcomes and reduce the risk of hypocalcaemia.
Summarizing the key message for clinicians, Dr. Nagendra said:
"Calcium carbonate and calcium citrate remain the preferred formulations, chosen based on bioavailability, clinical context, comorbidities, and patient preference. The statement also emphasizes maintaining vitamin D sufficiency while avoiding routine use of active vitamin D analogues except for specific indications. Overall, it advocates rational, individualized calcium supplementation with appropriate formulation, dosing, timing, and attention to drug interactions for safe and effective use."
The task force concluded that calcium supplementation should be personalized rather than routinely prescribed, with dietary optimization remaining the first-line strategy. By encouraging evidence-based prescribing and avoiding unnecessary supplementation, the recommendations aim to improve skeletal health while minimizing potential risks associated with excessive calcium intake.
Reference:
Bhattacharya S, Nagendra L, Agarwal K, Arjunan D, Kapoor N, Kaur P, et al. Calcium supplementation in the Indian context: A consensus statement by the Endocrine Society of India skeletal health taskforce. Indian J Endocr Metab 0;0:0.
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