L-Theanine
Nobre, A. C., Rao, A., & Owen, G. N. (2008). L-theanine, a natural constituent in tea, and its effect on mental state. Asia Pacific Journal of Clinical Nutrition, 17, 167-168.
Hidese, S., Ogawa, S., Ota, M., et al. (2019). Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial. Nutrients, 11(10), 2362.
Kimura, K., Ozeki, M., Juneja, L. R., & Ohira, H. (2007). L-Theanine reduces psychological and physiological stress responses. Biological Psychology, 74(1), 39-45.
Higashiyama, A., et al. (2011). Effects of L-theanine on attention and reaction time response. Journal of Functional Foods, 3(3), 171-178.
Lyon, M. R., Kapoor, M. P., & Juneja, L. R. (2011). The effects of L-theanine (Suntheanine®) on objective sleep quality in boys with ADHD. Alternative Medicine Review, 16(4), 348-354.
Rao, T. P., Ozeki, M., & Juneja, L. R. (2015). In Search of a Safe Natural Sleep Aid. Journal of the American College of Nutrition, 34(5), 436-447.
Yamada T., Tershima T., Okubo T., et al. (2005). Effects of theanine on neurotransmitter release and its relationship with glutamic acid neurotransmission. Nutr Neurosci, 8(4):219-26.
GABA (Gamma-Aminobutyric Acid)
Abdou, A. M., Higashiguchi, S., Horie, K., et al. (2006). Relaxation and immunity enhancement effects of gamma-aminobutyric acid (GABA) administration in humans. BioFactors, 26(3), 201–208.
Petroff, O. A. (2002). GABA and glutamate in the human brain. Neuroscientist, 8(6), 562-573.
Yoto, A., Murao, S., Motoki, M., et al. (2012). Oral intake of GABA affects mood and CNS activity during stressed condition induced by mental tasks. Amino Acids, 43(3):1331–1337
Lyon, M. R., Kapoor, M. P., & Juneja, L. R. (2011). (See also L-theanine & GABA combo in ADHD sleep study above).
Myo-Inositol
Levine, J., Barak, Y., Gonzalves, M., et al. (1995). Double-blind, controlled trial of inositol treatment of depression. Am J Psychiatry, 152(5):792-794.
Mukai T, Kishi T, Matsuda Y, Iwata N. A meta-analysis of inositol for depression and anxiety disorders. Hum Psychopharmacol. 2014 Jan;29(1):55-63.
Magnesium
Boyle, N. B., Lawton, C., & Dye, L. (2017). The Effects of Magnesium Supplementation on Subjective Anxiety and Stress – A Systematic Review. Nutrients, 9(5), 429.
Sartori, S. B., Whittle, N., Hetzenauer, A., & Singewald, N. (2012). Magnesium deficiency induces anxiety and HPA axis dysregulation: modulation by therapeutic drug treatment. Neuropharmacology, 62(1), 304-312.
Magnesium
Boyle, N. B., Lawton, C., & Dye, L. (2017). The Effects of Magnesium Supplementation on Subjective Anxiety and Stress – A Systematic Review. Nutrients, 9(5), 429.
Sartori, S. B., Whittle, N., Hetzenauer, A., & Singewald, N. (2012). Magnesium deficiency induces anxiety and HPA axis dysregulation: modulation by therapeutic drug treatment. Neuropharmacology, 62(1), 304-312.
B-Vitamins
Kennedy, D. O. (2016). B Vitamins and the Brain: Mechanisms, Dose and Efficacy – A Review. Nutrients, 8(2), 68.
Long, S. J., & Benton, D. (2013). Effects of vitamin and mineral supplementation on stress, mild psychiatric symptoms, and mood in nonclinical samples: a meta-analysis. Psychosom Med, 75(2), 144-153.
Young, L. M., Pipingas, A., White, D. J., et al. (2019). A Systematic Review and Meta-Analysis of B Vitamin Supplementation on Depressive Symptoms, Anxiety, and Stress. Nutrients, 11(9), 2232.
Tan Y, et al. Correlation between Vitamin B12 and Mental Health in Children and Adolescents: A Systematic Review and Meta-analysis. Clin Psychopharmacol Neurosci. 2023 Nov 30;21(4):617-633.
Rossignol DA, Frye RE. The Effectiveness of Cobalamin (B12) Treatment for Autism Spectrum Disorder: A Systematic Review and Meta-Analysis. J Pers Med. 2021 Aug 11;11(8):784.