Why are the elderly prone to vitamin D calcitriol deficiency?
According to the National Institutes of Health, older adults are at a significantly higher risk for vitamin D deficiency, a condition also known as hypovitaminosis D. Answering the question of **why are the elderly prone to vitamin D calcitriol deficiency** requires understanding a combination of physiological and lifestyle changes that affect the body's ability to create, absorb, and activate this critical nutrient.