Even One Glass of Alcohol a Day Increases Breast Cancer Risk

According to research involving over 12 million women and over 260 thousand breast cancer patients worldwide, drinking even a small glass of wine or beer during the day (approximately 10 g of alcohol) increases breast cancer risk by %5 in reproductive-age women and %9 after menopause.

Earlier studies established the link between alcohol and breast cancer risk, but the amount increasing risk was unknown. This study identifies it as one glass or 1 serving of alcohol.

The same study found that vigorous exercise such as running and cycling reduced breast cancer risk by %17 in reproductive-age women and %10 after menopause.

Moderate-intensity activities such as walking and gardening, exercise , were also found to reduce breast cancer risk after menopause. In addition, physical activity overall reduces postmenopausal breast cancer risk by %13.

In summary, a physically active lifestyle, maintaining a healthy weight throughout life and limiting alcohol consumption lower women’s breast cancer risk.

Factors Increasing and Decreasing Breast Cancer Risk

Besides physical activity and alcohol consumption, researchers identified other factors affecting breast cancer risk. One is obesity. Being overweight or gaining substantial weight in adulthood increases postmenopausal breast cancer risk.

Other factors affecting risk include breastfeeding and developmental factors. Breastfeeding reduces breast cancer risk, while being tall appears to increase it.

Recommendations to Reduce Risk

To prevent cancer generally, the authors recommend maintaining a healthy weight, at least 30 minutes of physical activity daily, and avoiding high-calorie drinks and foods. They also recommend a diet rich in whole grains, vegetables and legumes, reducing red meat and eliminating processed meat completely . Not consuming alcohol at all is best, but if consumed, the amount should be limited.

The research was conducted by the American Institute for Cancer Research (AICR) and the World Cancer Research Fund (WCRF).