New Study Reveals Link Between Night Shift Work and Increased Breast Cancer Risk
MIAMI, FL — According to a report released Tuesday by the American Cancer Society, a comprehensive meta-analysis of 15 long-term studies has established a statistically significant correlation between long-term night shift work and a 12% increased risk of developing breast cancer among premenopausal women. The research, published in the journal Cancer Epidemiology, Biomarkers & Prevention, analyzed health data from over 1.2 million women across Europe and North America. Researchers attribute the elevated risk to chronic disruption of the body's circadian rhythm, which suppresses melatonin production and may promote tumor growth. The study specifically identified that women who worked rotating night shifts for a period of 20 years or more faced the highest risk. The American Cancer Society recommends that women working night shifts prioritize sleep hygiene, maintain a healthy diet, and undergo regular mammogram screenings to mitigate risks. The findings prompt a critical review of occupational health guidelines for shift workers globally.