The emotions and mental states that cause stress are responsible for physiological damage that threatens our health. Fear, anger, and sadness cause biochemical and physical changes that threaten our cardiovascular health, immunity and quality of life. Mark Liponis, M.D., Corporate Medical Director of Canyon Ranch, explains that we can minimize the effects of those feelings by finding joy. Just a heartfelt laugh or a smile can cause a surge of serotonin that resets our biochemistry and puts us on a better pathway for health.