BioGaia Protectis baby drops with vitamin D is a probiotic food supplement containing the patented lactic acid bacterium Limosilactobacillus reuteri (formerly known as Lactobacillus reuteri) Protectis (L. reuteri DSM 17938) and vitamin D that helps the good microorganisms restore a natural balance in the gut. Vitamin D contributes to the normal function of the immune system in children and is also needed for normal growth and development of bone in children.