Morning People May Have Lower Breast Cancer Risk

Home Blog Morning People May Have Lower Breast Cancer Risk

A large study suggests that women who are morning people could be at lower risk for breast cancer. Researchers analyzed data on 180,216 women from the UK Biobank and 228,951 women from the Breast Cancer Association Consortium and found consistent evidence of morning preference having a protective effect on breast cancer risk. Sleeping more than 7-8 hours a night has an adverse effect on breast cancer risk. These effects are small compared to other risk factors, like BMI, alcohol consumption and smoking. 

Many studies have been done on modifiable factors, like night shift work and exposure to light at night, rather than traits or personal attributes, such as a morning or night preference. The new findings suggest "strong evidence of a causal effect" of chronotype or traits on breast cancer risk. There is a need for future research exploring how the stresses of our biological clock can be reduced. This research does not indicate that modifying sleep habits can lead to a decreased risk of cancer as there is no association with sleep habits or insomnia. The findings could help to align working hours with morning or night preferences in the working population.

Read the full story from Medical News Today.


Back to Top