No significant associations were found between Shannon diversity and AN subtype (restrictive vs. purgative), AN severity, i.e., based on the Diagnostic and Statistical Manual of Mental Disorders (DSM), hyperactivity, stress, psychiatric or physical comorbidities, hypothyroidism, malnutrition, psychometric scores (EDEQ, HAMA, HAMD), lipopolysaccharide-binding protein (LBP) levels, or other biochemical parameters. This evidence concerns the gene LBP and nutritional deficiency disease.