Do infants with cow's milk protein allergy have inadequate levels of vitamin D?

Objective: To verify whether infants with cow's milk protein allergy (CMPA) have inadequate vitamin D levels. Methods: This cross‐sectional study included 120 children aged 2 years or younger, one group with CMPA and a control group. The children were recruited at the pediatric gastroenterology, allergology, and pediatric outpatient clinics of a university hospital in the Northeast of Brazil. A questionnaire was administered to the caregiver and blood samples were collected for vitamin D quantification. Vitamin D levels