In an age where health information is just a click away, a 32-year-old woman found herself in the outpatient department (OPD) in a disoriented and confused state. For the past two weeks, she had been grappling with fatigue, constipation, nausea, and frequent urination. A routine blood test revealed an alarming calcium level of 12.5 mg/dL, well above the normal range of 8.5 to 10.5 mg/dL. Unbeknownst to her, she was mistakenly taking 2,000 mg of calcium supplements three times daily instead of the recommended 1,000 mg, after reading online advice that touted stronger bones and hair through increased calcium intake. In addition, her daily diet was rich in calcium from sources like dahi, almond milk, and paneer. This combination created a significant health risk.
Many people often believe that vitamin and mineral supplements can be freely used without a prescription or specific dosage recommendations. This common misconception can lead to serious health complications. In this case, the woman’s kidney function was compromised, and her thyroid function was also affected. She required intravenous fluids to help flush out the excess calcium from her bloodstream.
So, where did she go wrong? The reality is that young and healthy individuals usually do not need calcium supplements, as a well-balanced diet can provide the necessary intake. Excessive calcium supplementation may lead to elevated levels in the blood, increasing the risk of kidney stones and cardiovascular problems. Consuming calcium through food is generally safer and more effective for maintaining bone health, minimizing the risk of side effects such as constipation and gas.
What are the health impacts of excess calcium?
Untreated hypercalcemia, or excessive calcium levels, can result in kidney stones and permanent kidney damage over time. Elevated calcium levels can also disrupt the heart’s electrical activities, potentially leading to arrhythmias and other cardiovascular issues. Furthermore, high calcium levels can affect mental health, causing confusion, depression, irritability, and, in severe cases, coma. While calcium is essential for bone health, excessive levels can force the release of calcium from the bones into the bloodstream, resulting in weakened and brittle bones.
Do you need supplements when your diet is balanced?
Most individuals who include adequate amounts of dairy products, leafy greens, or fortified foods in their diets meet their daily calcium requirements—typically 1,000 to 1,200 mg—without the need for additional supplements. The body can tolerate a short-term upper limit of 2,000 mg of calcium daily; however, dietary sources are absorbed at a slower pace and in smaller, safer quantities, reducing the risks associated with high-dose supplements.
Supplements are typically suggested for those unable to meet their calcium needs through diet alone. Even then, combined dietary intake and supplementation should not exceed 1,000 to 1,200 mg per day.
A balanced diet can easily achieve 1,000 mg of calcium by incorporating three to four servings of dairy products (milk, yogurt, cheese) and calcium-rich plant foods like tofu, kale, and fortified beverages. For instance, one cup of yogurt provides 300-400 mg of calcium, a glass of milk offers about 300 mg, and 28 grams of cheese can contribute around 200 mg. Additionally, many fortified products are available in the market.
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Who really needs supplements?
Supplements are generally recommended for specific populations, such as individuals with osteoporosis, those on vegan diets, individuals with lactose intolerance, or those suffering from specific digestive disorders. Women who are pregnant, post-menopausal, or those with chronic kidney disease (CKD) may also require some supplementation, but this should only be taken under medical supervision.
How much calcium are you getting from your supplement?
Calcium supplements primarily come in two forms: calcium carbonate and calcium citrate. Calcium carbonate contains about 40% elemental calcium by weight (for example, 1,000 mg provides approximately 400 mg of calcium), while calcium citrate offers around 21% elemental calcium (1,000 mg yields about 200 mg of calcium). Calcium carbonate is best absorbed with food, as it requires gastric acids, whereas calcium citrate can be taken at any time and may be a better option for those with lower stomach acid levels.
Typically, a daily supplementation of 1,000 mg is divided into two tablets of 500 mg for better absorption.
When kept to the recommended dosage, these tablets do not pose any harm. However, if individuals increase their intake beyond this advised level, combine them with unprescribed Vitamin D supplements, and load their diets with dairy, it can lead to dangerously high levels of calcium in the body. Remember, more is not always better, particularly when it comes to supplements.
(Dr. Tickoo is Director, Internal Medicine, Max Healthcare)
