A randomized, double-blind placebo, Parallel design comparing vitamin D with Placebo will be conducted on 60 Healthy males and females with vitamin D deficiency, age from 18 to 49 years who attend the rehabilitation clinics at Jordan University Hospital .Participants who met the inclusion criteria will be asked to sign an informed witnessed consent form. Results obtained are expected to assess the safety and efficacy of the dose regimen used in this study as per Biodal SmPC. This study will also contribute to the global body of knowledge in this field. The major findings generated from this study could open certain avenues for further research through the association of the status of vitamin D in serum .