Hieu, T. H., Dibas, M., Surya Dila, K. A., Sherif, N. A., Hashmi, M. U., Mahmoud, M., Trang, N. T. T., Abdullah, L., Nghia, T. L. B., Y, M. N., Hoang-Trong, T., Tien Huy, N., Karimzadeh, S., Kamel, M. G., & Huy, N. T. (2019). Therapeutic efficacy and safety of chamomile for state anxiety, generalized anxiety disorder, insomnia, and sleep quality: A systematic review and meta-analysis of randomized trials and quasi-randomized trials. Phytotherapy Research, 33(6), 1604-1615. https://doi.org/10.1002/ptr.6349
Tier 2Systematic review and meta-analysis
Pooled trials found chamomile improved anxiety and sleep quality. The included studies vary in form and dose; this supports research interest in chamomile for sleep, framed cautiously for a tea.
Mao, J. J., Xie, S. X., Keefe, J. R., Soeller, I., Li, Q. S., & Amsterdam, J. D. (2016). Long-term chamomile (Matricaria chamomilla L.) treatment for generalized anxiety disorder: A randomized clinical trial. Phytomedicine, 23(14), 1735-1742. https://doi.org/10.1016/j.phymed.2016.10.012
Tier 2Randomised controlled trial (n=179)
Chamomile was safe and reduced anxiety symptoms over the long term. Used 1500 mg of chamomile EXTRACT daily (far more concentrated than a cup of tea), so we cite this for the ingredient's researched calming mechanism, not as proof a teabag matches that dose.
Adib-Hajbaghery, M., & Mousavi, S. N. (2017). The effects of chamomile extract on sleep quality among elderly people: A clinical trial. Complementary Therapies in Medicine, 35, 109-114. https://doi.org/10.1016/j.ctim.2017.09.010
Tier 2Clinical trial
Chamomile extract improved self-reported sleep quality in older adults. Used a concentrated extract in a specific population; cited for the sleep-support mechanism, not as a general promise.
Ghazizadeh, J., Sadigh-Eteghad, S., Marx, W., Fakhari, A., Hamedeyazdan, S., Torbati, M., Taheri-Tarighi, S., Araj-Khodaei, M., & Mirghafourvand, M. (2021). The effects of lemon balm (Melissa officinalis L.) on depression and anxiety in clinical trials: A systematic review and meta-analysis. Phytotherapy Research, 35(12), 6690-6705. https://doi.org/10.1002/ptr.7252
Tier 2Systematic review and meta-analysis
Pooled clinical trials found lemon balm improved anxiety and depression scores versus placebo. The strongest evidence is for calm/mood; we extend it to evening wind-down cautiously.
European Scientific Cooperative on Phytotherapy. (2019). Althaeae radix (Marshmallow root). ESCOP Monographs (2nd ed., supplement). ESCOP.
Tier 1Phytotherapy monograph
Gold-standard monograph documenting marshmallow root's traditional demulcent (soothing) action on the throat and mucous membranes. Cited for the smooth, soothing character of the cup, a traditional use.
National Center for Complementary and Integrative Health. (2020, October). Chamomile. U.S. Department of Health and Human Services. https://www.nccih.nih.gov/health/chamomile
Tier 1Government health-agency reference
An official, conservative overview of chamomile's traditional uses and safety. It notes evidence is still preliminary for many uses, which is the honest position this page takes.