Klean D™ is a key part of any athlete's training and nutrition program as vitamin D helps in the development and maintenance of bones. Vitamin D plays a key role in bone remodeling making it an important factor in the musculoskeletal system. When an athlete endures a stress fracture, higher bone turnover is required to heal and rebuild bone, requiring a higher vitamin D status. Clinical trials conducted on athletes with stress fractures indicate that supplementation with vitamin D can decrease healing time and prevent further fractures. Indications