We noticed that some bacterial taxons of the gut microbiota, namely Ruminococcaceae and Sutterellaceae, are associated with an increase in the concentration of this class of immunoglobulins in the blood serum, which may indicate that the families of Ruminococcaceae and Sutterellaceae are potential biomarkers of IgE-mediated food allergies. This evidence concerns the gene IGHE and food allergy.