The immune system is designed to protect the body from invading pathogens such as bacteria, viruses and parasites to keep us healthy and disease free. Unfortunately, anything that stresses us may cause chaos on our immune health, including everyday psychological stress, physical exertion or lack of exercise, pollution, lack of sleep, poor nutrition, travel, the normal aging process and change in climate. When our immune system is out of balance, this can result in a host of health issues such as colds and flu, allergies, weakened stress defense, inflammation, weight gain, digestive problems, sleep issues and premature aging.