A research published in the journal Occupational and Environmental Medicine looked at women who work more than two night shifts per week over several years. The participants appear to have a forty percent higher risk of developing breast cancer. The risk increases fifty percent in women who worked at least three night shifts a week for minimum of six years. A possible explanation is a disruption in the melatonin production, a hormone that protects against cancer. What recommendations do you make to your patients on how to improve their sleep and circadian rhythm?