This study consists of a 6-week, open-label, randomized clinical trial study to compare efficacy and tolerability of the natural treatments omega-3 fatty acids, inositol, and N-acetylcysteine (NAC) in the treatment of mood dysregulation in children and adolescents (ages 5-17). Subjects will be randomized to one of two arms: 1) omega-3 fatty acids plus inositol or 2) NAC.

Inclusion Criteria:

• Male or female subjects, 5-17 years of age.
• Current symptoms of emotional dysregulation as indicated by combined T-scores on the Child Behavior Checklist > 180 on the Anxiety/Depression + Aggression + Attention subscales.
• Subjects and their caregivers must be English-speaking, and have a level of understanding sufficient to communicate intelligently with the investigator and study coordinator, and to cooperate with all tests and examinations required by the protocol.
• Subjects and their caregivers must be willing and able to comply with all study procedures.
• Each subject and his/her parent/guardian must understand the nature of the study. The subject's parent/guardian must sign an informed consent document and the subject must sign an informed assent document.
• Subject must be able to swallow pills.
• Subject must have access to a computer with a camera, speaker, microphone, and internet connection.

Exclusion Criteria:

• Investigator and his/her immediate family; defined as the investigator's spouse, parent, child, grandparent, or grandchild.
• Serious or unstable illness including hepatic, renal, gastroenterological, respiratory, cardiovascular (including ischemic heart disease), endocrinologic, neurologic, immunologic, or hematologic disease.
• History of bleeding diathesis, including those with von Willebrand disease.
• Uncorrected hypothyroidism or hyperthyroidism.
• History of sensitivity to omega-3 fatty acids, inositol or NAC. A non-responder or history of intolerance to omega-3 fatty acid, inositol or NAC after 2 months of treatment at adequate doses as determined by the clinician.
• Severe allergies or multiple adverse drug reactions.
• Unstable or untreated seizure disorder.
• DSM-IV substance use, abuse or dependence.
• Judged clinically to be at serious suicidal risk or C-SSRS score ≥ 4.
• Current diagnosis of schizophrenia.
• Current diagnosis or symptoms of psychosis.
• IQ < 70.
• Pregnant or nursing.