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. The gene discussed is LBP; the disease is hypothyroidism.