Side effects of calcium pills with vitamin d
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Side Effects of Calcium Pills with Vitamin D
Hypercalcemia and Hypercalciuria
One of the primary side effects of long-term calcium and vitamin D supplementation is an increased risk of hypercalcemia and hypercalciuria. Hypercalcemia refers to elevated calcium levels in the blood, while hypercalciuria is characterized by high calcium levels in the urine. Studies have shown that individuals taking vitamin D supplements, with or without calcium, are at a higher risk of developing these conditions compared to those taking a placebo . Specifically, the risk of hypercalcemia was found to be 1.54 times higher, and the risk of hypercalciuria was 1.64 times higher in the vitamin D group .
Kidney Stones
The relationship between calcium and vitamin D supplementation and kidney stones is complex. While some studies suggest an increased risk of kidney stones with calcium supplementation, others do not find a significant association. For instance, a systematic review and meta-analysis indicated that vitamin D supplementation did not significantly increase the risk of kidney stones . However, the Women's Health Initiative (WHI) study noted a modest increase in urinary tract stone formation among women taking calcium and vitamin D supplements .
Cardiovascular Risks
Calcium supplements, particularly when taken without vitamin D, have been associated with an increased risk of cardiovascular events such as myocardial infarction and stroke. A meta-analysis of trials found a 27-31% increase in the risk of myocardial infarction and a 12-20% increase in the risk of stroke among those taking calcium supplements . This increased risk was consistent across multiple studies and was not mitigated by the co-administration of vitamin D 49. Therefore, the cardiovascular risks associated with calcium supplementation are a significant concern.
Effects on Glucose Metabolism and Lipid Concentrations
In women with polycystic ovary syndrome (PCOS), calcium and vitamin D supplementation has shown beneficial effects on glucose metabolism and lipid concentrations. A study found that co-supplementation led to decreased serum insulin levels, improved insulin sensitivity, and reduced serum triglycerides and VLDL-cholesterol levels . However, these benefits were specific to a particular population and may not be generalizable.
Bone Mineral Density
Calcium and vitamin D supplementation is often recommended to improve bone mineral density (BMD), especially in individuals at risk of osteoporosis. Studies have shown that these supplements can help reverse bone density loss caused by certain medications, such as Tenofovir disoproxil fumarate (TDF) used in HIV treatment . However, the benefits on BMD must be weighed against the potential risks of hypercalcemia and cardiovascular events.
Cancer Risk
The impact of calcium and vitamin D supplementation on cancer risk is still under investigation. Some studies suggest that high-dose vitamin D supplementation may reduce the risk of certain cancers, such as colorectal cancer, while others indicate no significant effect . The WHI study found that calcium and vitamin D supplementation did not significantly alter the risk of breast or colorectal cancer but did suggest a potential reduction in total invasive cancer risk among those not taking personal supplements .
Conclusion
Calcium pills with vitamin D can offer benefits such as improved bone mineral density and better glucose metabolism in specific populations. However, they also carry risks, including hypercalcemia, hypercalciuria, kidney stones, and increased cardiovascular events. The decision to use these supplements should be made cautiously, considering both the potential benefits and the associated risks. Further large-scale, long-term studies are needed to provide more definitive guidance on the use of calcium and vitamin D supplements.
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