The document discusses ADD and ADHD as complex neurobiological disorders linked to neurotransmitter deficiencies, particularly norepinephrine, dopamine, and serotonin. Key symptoms include inattention, hyperactivity, and impulsivity, with diagnosis primarily based on observed behaviors rather than definitive tests. The document also highlights potential causes such as genetic factors, prenatal exposure to toxins, and various medical conditions that can mimic ADHD symptoms.