Erisa’s Reviews > Why Zebras Don't Get Ulcers: The Acclaimed Guide to Stress, Stress-Related Diseases, and Coping > Status Update

Well, the good news is, stress probably doesn't cause cancer. The bad news is, working the night shift for long periods of time increases the risk of breast cancer because this causes the body to produce less melatonin over time. What about night owls who stay up for fun? I think they probably have an increased risk too, though probably not as big as night shift workers. So, go to sleep early friends. :)