Vitamin D is known as the Sunshine Vitamin and studies show that 50% of the population have insufficient vitamin D levels. This can effect bone development and cause deformities also in children. Australian allergy studies show that infants and young children who are deficient in Vitamin D are more likely to develop egg and peanut allergies and supplementing the vitamin has a protective effect in childhood. Unfortunately once the allergy is established, supplementing Vitamin D won’t reverse the allergy. The American Academy for Asthma, Allergies and Immunology (AAAAI) have more information.