Optimizing Research With Diverse Families - Feasibility and Acceptability Study (FAST)

Inclusion Criteria: * Children, ages 6-17 years at enrollment, with suspected or definite ADHD based on parent report in a majority of families that identify as Black or Hispanic or multicultural * Meet criteria on Child and Adolescent Symptom Inventory-5 (CASI-5) ADHD scale (6+ symptoms ≥ 2), occurring in \>1 setting, plus one impairing irritability symptom (≥2) from Oppositional Defiant Disorder (ODD) or Disruptive Mood Dysregulation Disorder (DMDD) subscale * Able and willing to swallow up to 8 pills per day * Medication free for 2 weeks prior to baseline * Willing to use Tasso® OnDemand SST+ to collect blood at home and filter cards to provide urine samples * Able to communicate in English * Parent/care giver identifies child as Black/African American or Hispanic/Latina/o or more than one race (target 70-100%) Exclusion Criteria: * Neurological disorders * Medical conditions (e.g. cancer, kidney or liver disease, diabetes, hyperthyroidism) * Psychiatric conditions requiring hospitalization * Allergy to any supplement ingredient * In people with a uterus: sexually active, pregnancy or suspected pregnancy * Abnormality of mineral metabolism