Adequate vitamin D levels are crucial for reducing the risk of hip fractures and certain cancers. While the RDA suggests 600 IU, optimal levels may be between 40 and 70 ng/mL. Strikingly, men over 90 face a 40% mortality risk within a year after a hip fracture, emphasizing the importance of maintaining sufficient vitamin D. Despite evidence supporting vitamin D testing, current guidelines recommend against it for non-pregnant adults.
