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