Amsterdam, J. D., Li, Y., Soeller, I., Rockwell, K., Mao, J. J., & Shults, J. (2009). A randomized, double-blind, placebo-controlled trial of oral Matricaria recutita (chamomile) extract therapy for generalized anxiety disorder. Journal of Clinical Psychopharmacology, 29(4), 378-382. https://doi.org/10.1097/JCP.0b013e3181ac935c
Tier 2Randomised controlled trial
Chamomile extract reduced generalised anxiety symptoms versus placebo over 8 weeks. Used a standardised extract, not tea, so cited for the calming mechanism behind a soothing ritual, not as proof a teabag treats anything.
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.
Bowman, R., Taylor, J., Muggleton, S., & Davis, D. (2021). Biophysical effects, safety and efficacy of raspberry leaf use in pregnancy: A systematic integrative review. BMC Complementary Medicine and Therapies, 21(1), 56. https://doi.org/10.1186/s12906-021-03230-4
Tier 2Systematic integrative review
Reviewed raspberry leaf in women's wellness and concluded the evidence is limited and more rigorous trials are needed. Cited honestly to show the tradition is long but the modern research is thin.
Grant, P. (2010). Spearmint herbal tea has significant anti-androgen effects in polycystic ovarian syndrome: A randomized controlled trial. Phytotherapy Research, 24(2), 186-188. https://doi.org/10.1002/ptr.2900
Tier 2Randomised controlled trial (n=42)
Drinking spearmint tea twice daily for 30 days reduced free and total testosterone in women with PCOS. Small trial; the reduction in visible hirsutism approached but did not reach significance. Genuine signal for the ingredient, not a treatment claim.
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.