Effects of a 10-day course of a high dose calciferol versus a single mega dose of ergocalciferol in correcting vitamin D deficiency.

Background And Objectives: The correction of vitamin D deficiency is crucial for optimal skeletal and non-skeletal health. Most regimens in current use are based on daily dosing, which may raise concerns of dosage inadequacy and suboptimal patient compliance. Vitamin D is available in 2 forms: D2 (ergocalciferol) and D3 (cholecalciferol).