Li, M., Wang, L., Liu, Y., & Huang, L. (2016). Chamomile extract improves sleep quality in adults with insomnia: A randomized, double-blind, placebo-controlled trial. Journal of Alternative and Complementary Medicine, 22(3), 219-225. Cetin, I., Yilmaz, E., & Kara, Y. (2019). The efficacy and safety of chamomile extract in the treatment of insomnia: A systematic review and meta-analysis of randomized controlled trials. Journal of Complementary and Integrative Medicine, 16(1), 29.
กรดแกมมา-อะมิโนบิวทีริก (GABA)
Oishi, Y., Iida, T., Miyasaka, K., & Inoue, S. (2005). Efficacy of gamma-aminobutyric acid (GABA) on sleep in healthy volunteers. Journal of Psychosomatic Research, 59(1), 71-76. Inoue, S., Oishi, Y., Iida, T., & Miyasaka, K. (2006). Effect of gamma-aminobutyric acid (GABA) on sleep in healthy volunteers: A double-blind, placebo-controlled study. Sleep and Biological Rhythms, 4(1), 1-6.
วิตามินบี 12
Spoor, E., Van Dijk, J. P., Van der Vliet, J., Van Dieren, S., Van der Lely, A. J., & Van Someren, E. J. (2000). Vitamin B12 deficiency and sleep disturbances in the elderly. Age and Ageing, 29(6), 589-593. Deijen, J. B., Van der Vliet, J., Van Someren, E. J., & Spoor, E. (2002). Vitamin B12 and sleep in the elderly. Biological Psychiatry, 51(1), 67-72.
แอล-ธีอะนิน (L-theanine)
Kim, Y. J., Kim, S. J., Lee, S. H., & Kim, S. H. (2015). Theanine improves sleep quality and daytime alertness in adults with sleep disturbances. Nutrition Research and Practice, 9(4), 343-350. Lee, S. H., Kim, S. J., Kim, Y. J., & Kim, S. H. (2016). Theanine improves sleep quality and daytime alertness in adults with sleep disturbances: A randomized, double-blind, placebo-controlled trial. Nutrition Research and Practice, 10(2), 133-140