Which statement about vitamin D and health is true?

Vitamin D plays a crucial role in maintaining bone health by promoting calcium absorption in the gut and facilitating normal immune system function. Research has shown that adequate levels of vitamin D can significantly decrease the risk of fractures, particularly in older adults who are more susceptible to falls and associated injuries. This makes the statement regarding its role in fracture risk reduction accurate and supported by clinical evidence.

The other statements lack accuracy in their claims. For instance, while some might suggest that less than 1000 IU/day is sufficient for most adults, current guidelines often recommend higher daily intakes to achieve optimal health benefits. Additionally, stating that low levels of vitamin D are only associated with hip pain overlooks its broader implications. Insufficient vitamin D is linked to various health issues beyond just hip pain, including a higher risk of other skeletal problems and general health consequences. Therefore, only the statement about decreasing the risk of fractures is correct.