Could a vitamin d boost strengthen bones and mobility after neurological injury?

This trial is testing whether vitamin D supplements can improve bone density, body composition, strength, walking speed, and physical performance in people hospitalized with neurological disorders like stroke, spinal cord injury, or traumatic brain injury. Participants will receive one of two vitamin D dosing plans over 8 weeks, while researchers track changes in these health measures and pain levels. The study also includes healthy controls for comparison, aiming to understand how common vitamin D insufficiency is in this population and whether supplementation helps.