Headshot photo of Jeni Johnstone, Ph.D.

Jeni Johnstone, Ph.D.

  • Associate Professor of Psychiatry, Division of Clinical Psychology, School of Medicine
  • Clinical Psychologist, Psychiatry, Division of Child and Adolescent Psychiatry, School of Medicine


My primary research interests are complementary and integrative interventions for attention, mood, and anxiety issues in children and adults. Currently, I am running a study on supplementation with broad-spectrum micronutrients (vitamins+minerals) in children with ADHD, the Micronutrients for ADHD in Youth, (MADDY) Study. In addition to behavior changes, the SNACK Lab team is examining participants' biological samples in order to begin understanding for whom and why the intervention works. We analyze participants' biological samples in order to identify biomarkers of treatment response. I have conducted research on mindfulness strategies to reduce stress and improve mood in adolescents, and have looked at childhood factors that impact response to depression treatment in adults.

Education and training

  • Degrees

    • M.A., 2006, Santa Clara University
    • Ph.D., 2014, University of Otago
  • Fellowship

    • NIH-funded fellowship - Oregon Center for Complementary and Alternative Medicine in Neurological Disorders (ORCCAMIND) through the National Center for Complementary and Integrative Health, Oregon Health & Science University 2014-2017
  • Certifications

    • Postgraduate Diploma in Clinical Psychology, University of Canterbury; Christchurch, New Zealand, 2011

Memberships and associations:

  • American Psychological Association, Division 53 (Child & Adolescent Psychology)
  • International Society for Nutritional Psychiatry Research (ISNPR)
  • International Society for Research in Child and Adolescent Psychopathology (ISRCAP)

Areas of interest

  • ADHD
  • Mood disorders
  • Anxiety
  • PTSD
  • Parenting challenges
  • Family therapy
  • Lifestyle factors that impact mental health

Honors and awards

  • 2018-2020 NIH-NCCIM 5R90AT00892403,


Elsevier pure profile

Selected publications

  • Holton, KF*, Johnstone JM*, Brandley, ET, JT Nigg. (2018). Evaluation of dietary intake in children and college students with and without Attention-Deficit/Hyperactivity Disorder. Nutritional Neuroscience.1-14.   *Joint first authors
  • Rucklidge JJ, Eggleston M, Johnstone JM, Darling K, Frampton CM. (2018). Vitamin-mineral treatment improves aggression and emotional control in children with ADHD: A fully-blinded, randomized, placebo-controlled trial. Journal of Child Psychology and Psychiatry, 59(3), 232-246. doi: 10.1111/jcpp 12817
  • Johnstone JM, Roake C, Sheikh I, Mole A, Nigg JT, Oken B. (2016). School-based mindfulness intervention for stress reduction in adolescents: Design and methodology of an open-label, parallel group, randomized controlled trial. Contemporary Clinical Trials Communications, 4:99-104, doi:10.1016/j.conctc.2016.07.001.
  • For a complete list of publications, see:  https://ohsu.pure.elsevier.com/en/persons/jeni-johnstone 


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