Schisandra Berry Extract is an adaptogen used for centuries in China and Russia to help support depleted cortisol levels from chronic stress and fatigue. Published studies show it helps increase nitric oxide, a chemical naturally produced in the body, that causes blood vessels to expand for improved blood flow and circulation which increases nutrient stores throughout the body. This improves response to mental stress for greater cognitive clarity and emotional well being, as well as physical stress which improves physical endurance for better workouts.