Methods of treating or suppressing Pervasive Developmental Disorders (PDDs) including Autistic Disorder, Aspergers Disorder, Childhood Disintegrative Disorder (CDD), Retts Disorder, and PDD-Not Otherwise Specified (PDD-NOS) comprising administering to a subject in need thereof a therapeutically effective amount of a tocotrienol, a tocotrienol ester, a tocotrienol ether, a tocotrienol enriched extract or mixtures thereof.
