What do studies say about IgE Allergie Basis?

The provided context does not contain specific studies on the basis of IgE in allergies. IgE is a key antibody in type I hypersensitivity reactions, but the available information here covers DNA tests for vitamin D, iron, B6, CRP, and celiac risk, plus a brief mention of allergy blood tests for eczema. The latter notes that IgE tests may help identify triggers but provides no evidence-based assessment. Without direct references from the context, no substantive conclusion can be drawn about the scientific evidence for IgE allergy basis. The evidence level is therefore unclear. For a reliable overview, consult current guidelines (e.g., EAACI) or systematic reviews.