Dr. Johnstone is an Affiliate Research Investigator in the Helfgott Research Institute. Her commitment to research is integrative and complementary treatment for mental health conditions including ADHD, irritability, stress, and anxiety. Dr. Johnstone received her PhD in Psychological Medicine from University of Otago in 2014, and her Post-Graduate Diploma in Clinical Psychology from the University of Canterbury in 2011, both in Christchurch, New Zealand. She also holds a Masters in Counseling Psychology from Santa Clara University in California, in 2006. She completed an NIH-funded T32 at Oregon Health & Science University and an NIH-funded R90 through National University of Natural Medicine’s Helfgott Research Institute. Her research interests include multi-nutrient supplementation and mind-body interventions in people with stress, anxiety, irritability and ADHD.