Vitamin D Supplementation and Tibia Fracture. Does it Improve Healing Rate?

Inclusion Criteria: * Tibial fracture * ASA physical status classification system I-II. * 25 hydroxyvitamin D below 30ng/ml) * Fracture treatment with reamed intramedullary nail Exclusion Criteria: * Open Fractures Gustillo III B and III C * Closed Soft tissue injury with Tscherne classification of III * Acute Compartment Syndrome * Pathology fractures (That occur in abnormal bone, for example in the presence of tumor, cyst or Paget disease) * Other Fractures in lower limbs or spine that does not allow full weight bearing of the operated tibia after 4 weeks * More than 7 days of evolution from fracture occurrence * Diabetes mellitus with HbA1c more or equal than 7% * Peripheral vascular disease * Rickets * Pre-existing disorders of the metabolism of Vitamin D and/or homeostasis of calcium and phosphorous (ie. Hepatic insufficiency, congenital defects of the vitamin D metabolism, disorders of the parathyroid glands, hypo or hyper calcemia) * Renal failure with glomerular filtration rate below 60ml/min according to MDRD-4. * Patients using nephrotoxic medications in high doses, requiring periodical monitoring of glomerular filtration rate * Patients undergoing with nephrotic syndrome or that suffered it in the past * Patients that suffered nephrolithiasis or urolithiasis * Pregnant women * Patients with allergy to vitamin D or other contraindications for vitamin D3 prescription * Patients that are taking multivitamin supplements containing vitamin D and will not suspend taking them during the study. * Patients that are not able to swallow a cup of water