There is a unique class of healing plants called "adaptogens" that have the proven ability to fight stress with their "non-specific response"*. Their unique power is to normalize the endocrine system operations (in particular the release of stress hormones) thanks to their amphoteric nature, which means that they can act as agonists or non-agonists in relation with the current individual condition.
*Credits: Adaptogens: Herbs for Strength, Stamina, and Stress Relief by David Winston, RH(AHG) and Steven Maimes, published by Inner Traditions International and Bear & Company, ©2007. All rights reserved. http://www.Innertraditions.com. Reprinted with permission of publisher.