From Importance of a balanced diet for mental health Science Daily
Omega-3, essential amino acids, B-group vitamins (B12 and folate), vitamin D and minerals like zinc, magnesium and iron.
A balanced and high-quality diet, such as the Mediterranean, provides all of these, the researchers note.
Jerome Sarris, Alan C Logan, Tasnime N Akbaraly, G Paul Amminger, Vicent Balanzá-Martínez, Marlene P Freeman, Joseph Hibbeln, Yutaka Matsuoka, David Mischoulon, Tetsuya Mizoue, Akiko Nanri, Daisuke Nishi, Drew Ramsey, Julia J Rucklidge, Almudena Sanchez-Villegas, Andrew Scholey, Kuan-Pin Su, Felice N Jacka. Nutritional medicine as mainstream in psychiatry. The Lancet Psychiatry, 2015; 2 (3): 271 DOI:10.1016/S2215-0366(14)00051-0
PDF is free to those who register (quick) at the Lancet site
References include
- Lai JS, Hiles S, Bisquera A, Hure AJ, McEvoy M, Attia J.
A systematic review and meta-analysis of dietary patterns and depression in community-dwelling adults. Am J Clin Nutr 2014; 99: 181–97. 12 - Psaltopoulou T, Sergentanis TN, Panagiotakos DB, Sergentanis IN, Kosti R, Scarmeas N.
Mediterranean diet, stroke, cognitive impairment, and depression: a meta-analysis. Ann Neurol 2013; 74: 580–91. - Sánchez-Villegas A, Martínez-González MA, Estruch R, et al.
Mediterranean dietary pattern and depression: the PREDIMED randomized trial. BMC Med 2013; 11: 208. 
Authors are a part of International Society for Nutritional Psychiatry Research (ISNPR)
Which has an interesting set of publications online – with hyperlinks
- A randomized placebo-controlled trial of an omega-3 fatty acid and vitamins E+C in schizophrenia (Open Access)
 - Dietary Patterns and Depressive Symptoms over Time: Examining the Relationships with Socioeconomic Position, Health Behaviours and Cardiovascular Risk (Open Access)
 - Fermented foods, microbiota, and mental health: ancient practice meets nutritional psychiatry (Open Access)
 - Vitamin-mineral treatment of attention-deficit hyperactivity disorder in adults: double-blind randomised placebo-controlled trial
 - Moving Towards a Population Health Approach to the Common Mental Disorders – (Open Access)
 - Dietary patterns and suicide in Japanese adults: health center-based prospective study
 - Fish Oil for Attenuating Posttraumatic Stress Disorder Symptoms among Rescue Workers after the Great East Japan Earthquake: A Randomized Controlled Trial (Open Access)
 - Dietary patterns and depressive symptoms among Japanese men and women
 - Serum folate and homocysteine and depressive symptoms among Japanese men and women (Open Access)
 - Green tea and coffee consumption is inversely associated with depressive symptoms in a Japanese working population
 - PTSD and the attenuating effects of fish oils: Results of supplementation after the 2011 Great East Japan Earthquake (Open Access)
 - Are omega-3 fatty acids anti-depressants or just mood-improving agents? The effect depends upon diagnosis, supplement preparation, and severity of depression (Open Access)
 - Long-Chain -3 Fatty Acids for Indicated Prevention of Psychotic Disorders (Open Access)
 - Maternal and Early Postnatal Nutrition and Mental Health of Offspring by Age 5 Years: A Prospective Cohort Study
 - Depression, diet and exercise (Open Access)
 - Preventative strategies in depression: gathering evidence for risk factors and potential interventions (Open Access)
 - Therapeutic use of omega-3 fatty acids in bipolar disorder
 - Association of Western and Traditional Diets With Depression and Anxiety in Women (Open Access)
 - A prospective study of diet quality and mental health in adolescents (Open Access)
 - The association between habitual diet quality and the common mental disorders in community-dwelling adults: The Hordaland Health Study (Open Access)
 - Dietary selenium and major depression
 - Red Meat Consumption and Mood and Anxiety Disorders
 - The dietary intake of fish, PUFAs and clinical depressive and anxiety disorders in population-based women
 - Diet quality and mental health problems in adolescents from East London: a prospective study
 - The association between fruit and vegetable consumption and mental health disorders: evidence from four waves of a national survey of Canadians
 - Nutrients and the common mental disorders
 - A Randomised Controlled Trial Investigating an Annual High Dose Vitamin D3 and Mental Well-Being: Vital D Study (Open Access)
 - Diet quality in bipolar disorder in a population-based sample of women
 - Diet and depressed mood in adolescents: Results from the Healthy Neighbourhoods study
 - The association between magnesium intake and depression and anxiety in community-dwelling adults: The Hordaland Health Study
 - Diet, exercise, lifestyle modification and complementary medicine for anxiety disorders: A review of current evidence (Open Access)
 - A randomised, controlled trial of a dietary intervention for adults with major depression (the SMILES trial): study protocol (Open Access)
 - Broad-spectrum micronutrient formulas for the treatment psychiatric symptoms: A systematic review
 - Shaken but unstirred? Effects of micronutrients on stress and trauma after an earthquake: RCT evidence comparing formulas and doses
 - Omega-3 polyunsaturated fatty acids for major depressive disorder
 - Phospholipase A2 and cyclo-oxygenase 2 genes influence the risk of interferon-alpha-induced depression by regulating polyunsaturated fatty acids levels (Open Access)
 - Intestinal microbiota, probiotics and mental health: from Metchnikoff to modern advances: Part II – contemporary contextual research (Open Access)
 - Intestinal microbiota, probiotics and mental health: from Metchnikoff to modern advances: Part III – convergence toward clinical trials (Open Access)
 - Clinical implications of lipid peroxidation in acne vulgaris: old wine in new bottles
 - Omega-3 Fatty Acid Supplementation in Adolescents With Borderline Personality Disorder and Ultra-High Risk Criteria for Psychosis: A Post Hoc Subgroup Analysis of a Double-Blind, Randomized Controlled Trial
 - Polyunsaturated fatty acids in emerging psychosis
 - Decreased nervonic acid levels in erythrocyte membranes predict psychosis in help-seeking ultra-high-risk individuals
 - Omega-3 fatty acid supplementation changes intracellular phospholipase A2 activity and membrane fatty acid profiles in individuals at ultra-high risk for psychosis
 - Dietary intake of folate, other B vitamins, and omega-3 polyunsaturated fatty acids in relation to depressive symptoms in Japanese adults
 - Serum pyridoxal concentrations and depressive symptoms among Japanese adults: results from a prospective study
 - Fish consumption and cardiovascular response during mental stress (Open Access)
 - Potential role of brain-derived neurotrophic factor in omega-3 fatty acid supplementation to prevent posttraumatic distress after accidental injury: An open-label pilot study (Open Access)
 - Clearance of fear memory from the hippocampus through neurogenesis by omega-3 fatty acids: A novel preventive strategy for posttraumatic stress disorder? (Open Access)
 - Association between serum 25-hydroxyvitamin D and depressive symptoms in Japanese: analysis by survey season
 
