1. Jamshidi N, Cohen MM. The Clinical Efficacy and Safety of Tulsi in Humans: A Systematic Review of the Literature. Evid Based Complement Alternat Med. 2017;2017:9217567.
2. Bhattacharyya D, Sur TK, Jana U, Debnath PK. Controlled programmed trial of Ocimum sanctum leaf on generalized anxiety disorders. Nepal Med Coll J. 2008 Sep; 10(3):176-9.
3. Mishra, LC, Singh BB, Dagenais S. Scientific basis for the therapeutic use of Withania somnifera (ashwagandha): a review. Altern Med Rev 2000; 5(4):334-346.
4. Withania somnifera. Monograph. Altern Med Review 2004;9(2):211-214.
5. Rhodiola rosea. Altern Med Review 2002;7 (5):421-423.
6. Shevtsov, VA, Zholus BI, et al. A randomized trial of two different doses of a SHR-5 Rhodiola rosea extract versus placebo and control of capacity for mental work. Phytomedicine 2003; 10(2-3):95-105.
7. Spasov AA, Wikman GK, Mandrikov, et al. A double blind, placebo controlled pilot study of the stimulating and adaptogenic effect of Rhodiola rosea SHR-5 extract on the fatigue of students caused by stress during an examination period with a repeated low-dose regimen. Phytomedicine 2000;7:85-89.
8. Panossian AG, Oganessian AS, et al. Effects of heavy physical exercise and adaptogens on nitric oxide content in human saliva. Phytomedicine 1999; 6(1):17-26.
9. Kang SY, Lee KY, et al. ESP-102, a standardized combined extract of Angelica gigas, Saururus chinensis
and Schizandra chinensis, significantly improved scopolamine-induced memory impairment in mice. Life Sci 2005; 76(15):1691-1705.
10. Guilliams TG, Edwards L. Chronic Stress and the HPA Axis. The Standard 2010;9(2).