ADIPOQ and attention deficit-hyperactivity disorder: Anthranilic acid, kynurenine, Triiodothyronine, dehydroepiandrosterone sulphate, 4-hydroxy-2-nonenal-mercapturic acid, adiponectin, and all major serum sphingomyelins have been reported to be promising blood biomarkers to diagnose ADHD (49, 87–89).