Women who work the night shift have been shown to have a higher risk of cancer, reports Time. 

When the researchers looked more closely at the types of cancer the women were getting, they found that women who worked night shifts for longer periods of time had a 41% higher risk of skin cancer, 32% higher risk of breast cancer and an 18% greater risk of digestive system cancers compared to women who did not work night shifts. The risk was highest among nurses who worked at night; their risk of developing breast cancer if they worked night shifts long term was 58% higher than nurses who didn’t have night shifts.