Vitamin D supplementation alone may also support bone health. Clinical studies involving vitamin D supplementation suggest the importance of vitamin D in addition to calcium for bone health. Decreased exposure to sunlight, a vegetarian diet, or a low intake of vitamin D fortified foods also play a role in inadequate vitamin D levels.īone Health: Vitamin D promotes intestinal calcium and phosphorous absorption and reduces urinary calcium loss, essential mechanisms for maintaining proper calcium levels in the body and for healthy bone composition. Vitamin D levels have been shown to decline with age, due primarily to a reduction in either absorption or metabolism by the liver. Vitamin D3 enhances calcium absorption and retention, a key nutritional role in supporting healthy bones, and may play a potential role in cardiovascular, colon and cellular health.
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