There are also reports in the literature of a possible protective effect of fatty foods on the frequency of dental caries.73 Furthermore, the lower prevalence of dental caries in obese children has been justified by the fact that overweight/obese children have high levels of immunoglobulin A antibody (IgA-s) in their saliva.20,74 This is an important factor that influences the microbial adhesion on tooth surfaces, and may hence interfere in the process of caries development and prevention.32,47,51. The gene discussed is CD79A; the disease is dental caries.