Houston: Women who take calcium or vitamin D pills daily are at greater risk of developing kidney stones, a new study has warned. Researchers at the Creighton University Medical Center in the US found that women who took the vitamin supplements for over a year were found to have higher calcium levels in their blood and urine, a condition called hypercalciuria which could increase the risk of kidney stones. "The use of calcium and vitamin D supplementation may not be as benign as previously thought," said lead study author Dr Christopher Gallagher, director of the Bone Metabolism Unit at Creighton. "Pending further information, people should not exceed the guidelines suggested, which are 800 international units of vitamin D, and 800-1,200 mg per day of calcium," he said. According to the researchers, taking vitamin supplements has become a widespread practice throughout many parts of the world. Despite their popularity, the precise health effects of long-term calcium and vitamin D supplementation still remain unclear, they said. Past research has indicated that elevated calcium in the blood, or hypercalcemia, could increase the risk of kidney stones. It is associated with many complications, including bone and kidney problems.
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