1. There Are 12 Hallmarks Of Aging — This Vitamin May Improve All Of Them  MindBodyGreen
  2. Association of serum 25(OH)D3 and cognitive levels with biological aging in the elderly: a cross-sectional study  Frontiers
  3. Assessing the Predictive Value of Serum Vitamin D Levels for Hip Fracture Risk in Older Adults and Identifying Associated Risk Factors  Cureus