Alcohol Recognized as a Direct Contributor to Breast Cancer Risk, Even at Low Levels

World Cancer Research Fund (WCRF), in collaboration with the Harvard Th Chan School of Public Health and the Baléare Islands Research Institute, demonstrates that even in low doses, alcohol increases the risk of developing breast cancer. This synthesis of 84 international studies deeply renews the recommendations in terms of prevention.

A new global approach: food and behavioral patterns

This report is based on an innovative and rigorous methodology: the analysis of Dietary and lifestyle patterns (DLPS). Unlike conventional approaches centered on isolated foods or behaviors, this method assesses the combined impact of the whole lifestyle on the risk of cancer. It takes into account not only food, but also physical activity, body mass index, smoking and alcohol consumption. This work is part of the Global Cancer Update Program, the largest scientific database on the links between cancer, food and health behavior.

According to Professor Edward Giovannucci, this approach represents an essential advance. “” By analyzing the lifestyle as a whole, we can make much more effective recommendations for prevention ». The report highlights that the effectiveness of the measures is reinforced when they are applied jointly.

Concretely, women are recommended to favor a diet rich in fibers, fruits and vegetables, to maintain regular physical activity, to reduce processed products, red meats and sugary drinks, and above all to completely avoid alcohol and tobacco. These tips are not theoretical. They are based on solid evidence deemed “strong” by an independent panel of experts. The challenge is to offer a realistic, adaptable and effective model for breast cancer prevention.

Alcohol: an underestimated and poorly understood threat

For decades, alcohol has benefited from an ambiguous public image, often perceived as safe in moderate quantity. However, scientific data is clear. Alcohol consumption, even light, increases the risk of breast cancer. According to the Breast Cancer Research Foundation (BCRF), daily consumption of a glass leads to an increase in the risk of 7 to 10 % compared to abstinent women. This risk increases to 20 % with two to three glasses per day.

This link is biologically founded. Alcohol acts on several mechanisms associated with cancerogenesis. It increases the levels of circulating estrogen, thus promoting the development of breast cancers called “hormone -dependent”, the most frequent. Ethanol is also transformed into the body into acetaldehyde. This compound, highly toxic, damages DNA and interferes with the cellular repair mechanisms. This oxidative stress can initiate the formation of tumor cells. In parallel, alcohol decreases the absorption of essential nutrients, such as Folat, involved in DNA stability, and contributes to overweight, itself a recognized risk factor.

Despite these data, the public perception remains largely disconnected from reality. A study cited by the BCRF reveals that 51 % of adults ignore the link between alcohol and cancer. Worse, some even believe that alcohol protects from cancer. These erroneous beliefs have their origin in vague messages, often influenced by the alcohol industry. The fault also with the dissemination of received ideas such as the so -called protective effects of red wine. To date, no scientific evidence supports these allegations. On the contrary, all forms of alcohol – beer, wine or spirits – present the same risk.

Young women, a particularly vulnerable population

The vulnerability of young women in the face of breast cancer associated with alcohol is based on precise organic bases. Between puberty (menarche) and the first pregnancy led to term, breast tissues are experiencing intense cell proliferation. During this period, cells are still immature and particularly sensitive to carcinogenic agents. Alcohol, by its ability to alter DNA and increase estrogen levels, can cause lasting mutations on a breast tissue in full transformation.

This vulnerability window coincides with the age when alcohol consumption is often the highest. The figures are worrying. A study published in Jama Network Open And relayed by the BCRF indicates an increase of 41 % of the episodes of binge drinking in women aged 18 to 25 from the Pandemic of COVID-19. These episodes – defined by the consumption of four or more glasses in a few hours – exhibit these women in high doses of alcohol over a short period, which worsens the cellular and hormonal impact.

To this is added an alarming ignorance of the risks. Few young women are informed of the direct link between alcohol and breast cancer, and even less of their own vulnerability at this key period of their biological development. For the Dre Dora Romaguera, ” only a global approach to lifestyle can effectively reduce this risk ». Adopting good habits early could avoid heavy long -term consequences.

Towards a political and cultural turning point?

The WCRF report insists on too often overlooked. Cancer prevention cannot be based solely on individual responsibility. Researchers call for structuring public policies, capable of creating an environment favorable to health choices. This implies increased taxation of alcoholic beverages, clear risk labeling on bottles, regulation of alcohol marketing, and incentive measures to promote the consumption of healthy products. Access to sports practice and quality food must be guaranteed. Especially in disadvantaged areas.

Dr. Giota Mitrou recalls that ” Without coordinated actions on the scale of the company, it remains illusory to hope for lasting changes in behavior ». Health choices largely depend on the context in which they register. It is necessary to take into account: urban environment, cost of products, social pressure, level of education or cultural standards.

The report also highlights the importance of adapting recommendations to local realities. An effective prevention model must be culturally acceptable, supported by inclusive policies, and based on equity. Prevention can only be effective if it is made possible and desirable for all social categories.