Vitamin D Levels Correlate with Wheezing and Asthma Recurrence in Children

Vitamin D is a secosteroid with a pivotal role in the calcium and phosphate metabolism, two ions that are essential for bone mineralization, neuromuscular activity and general cell functions. Sources of vitamin D are either endogenous (production in the skin from 7-dehydrocholesterol under the influence of sunlight UV-B radiation) [1] or exogenous (dietary). The dietary forms of vitamin D are either of vegetal origin (ergocalciferol, vitamin D2) [2] or of animal origin (colecalciferol, vitamin D3) [3]. The two calciferol forms are similarly metabolized in humans, have equal bioavailability and effectiveness [4]. […]