For busy working professionals, long working hours and lack of rest can contribute to fatigue and illness BRANDS X6Essence of Chicken with Cordyceps helps to increase the Qi, or vital energy, that flows through the body to promote stamina, overall well being, and recovery from fatigue and illness The combination of principal herbs Cordyceps and Astraglus with Essence of Chicken strengthens the function of lungs, kidneys, liver and benefits the respiratory system