1- Department of Psychology, University of Wales Swansea, United Kingdom.

The influence of phosphatidylserine supplementation on mood and heart rate when faced with an acute stressor.

Nutr Neurosci. 2001;4(3):169-78. 



2- Department of Pharmacology, Dr. B.C. Roy Institute of Post Graduate Medical Education and Research, 244B, Acharya J.C. Bose Road, Kolkata 700020, India.

Controlled programmed trial of Ocimum sanctum leaf on generalized anxiety disorders.

Nepal Med Coll J. 2008 Sep;10(3):176-9.


3- Department of Biochemistry, Seema Dental College & Hospital, Barrage Road, Rishikesh, Dehradoon - 249 203, Uttranchal

Therapeutic uses of Ocimum sanctum Linn (Tulsi) with a note on eugenol and its pharmacological actions: a short review.

Indian J Physiol Pharmacol. 2005 Apr;49(2):125-31. 



4- U.S. Army Research Institute of Environmental Medicine, Natick, MA 01760-5007.

Treatment with tyrosine, a neurotransmitter precursor, reduces environmental stress in humans.

Brain Res Bull. 1989 Apr;22(4):759-62.


5- Thermal and Mountain Medicine Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA 01760, USA.

Dietary tyrosine benefits cognitive and psychomotor performance during body cooling.

Physiol Behav. 2007 Feb 28;90(2-3):301-7. Epub 2006 Oct 31. 



6- Tarasov IuA, Sheĭbak VM, Moĭseenok AG.

[Adrenal cortex functional activity in pantothenate deficiency and the administration of the vitamin or its derivatives].

Vopr Pitan. 1985 Jul-Aug;(4):51-4. 



7- Neuropsychopharmacology Laboratory, Brain Sciences Institute, Swinburne, University of Technology, Victoria, Australia.

The acute effects of L-theanine in comparison with alprazolam on anticipatory anxiety in humans.

Hum Psychopharmacol. 2004 Oct;19(7):457-65


8- L-theanine a unique amino acid of green tea and its relaxation effect in humans

Trends in Food Science & Technology, Volume 10, Issue 12, December 1999, Page 425. 



9- Psychiatrische Universitätsklinik, Basel, Schweiz.

A functional-dimensional approach to depression: serotonin deficiency as a target syndrome in a comparison of 5-hydroxytryptophan and fluvoxamine.

Psychopathology. 1991;24(2):53-81.


10- 5-Hydroxytryptophan: a clinically-effective serotonin precursor.

Altern Med Rev. 1998 Aug;3(4):271-80.


11- Department of Biological Psychiatry, University Hospital, Utrecht, The Netherlands.

Effect of a serotonin precursor and uptake inhibitor in anxiety disorders; a double-blind comparison of 5-hydroxytryptophan, clomipramine and placebo.

Int Clin Psychopharmacol. 1987 Jan;2(1):33-45. 



12- Swedish Herbal Institute Research and Development, Spårvägen 2, SE-43296 Askloster, Sweden.

Evidence-based efficacy of adaptogens in fatigue, and molecular mechanisms related to their stress-protective activity.

Curr Clin Pharmacol. 2009 Sep;4(3):198-219. Epub 2009 Sep 1. 



13- Center for Human Nutrition, University of California, Los Angeles, Los Angeles, CA 90095, USA.

Effect of Cs-4 (Cordyceps sinensis) on exercise performance in healthy older subjects: a double-blind, placebo-controlled trial.

J Altern Complement Med. 2010 May;16(5):585-90. 



14- Department of Health Sciences, Laboratory of Sports Medicine and Sport Related Nutrition University of Rome Foro Italico - IUSM, Rome, Italy.

Effects of chronic Rhodiola Rosea supplementation on sport performance and antioxidant capacity in trained male: preliminary results.

J Sports Med Phys Fitness. 2010 Mar;50(1):57-63.


15- Department of Psychology, Uppsala University, Uppsala, Sweden.

A randomised, double-blind, placebo-controlled, parallel-group study of the standardised extract shr-5 of the roots of Rhodiola rosea in the treatment of subjects with stress-related fatigue.

Planta Med. 2009 Feb;75(2):105-12 



16- Department of Pharmacology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India.

Anxiolytic-antidepressant activity of Withania somnifera glycowithanolides: an experimental study.

Phytomedicine. 2000 Dec;7(6):463-9.


17- Department of Family Medicine, SUNY Upstate Medical University, Syracuse, NY.

An alternative treatment for anxiety: a systematic review of human trial results reported for the Ayurvedic herb ashwagandha (Withania somnifera).

J Altern Complement Med. 2014 Dec; 20(12):901-8.