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Article Summary
- The U.S. surgeon general issued an advisory on alcohol and cancer risk, recommending labeling alcoholic beverages with cancer warnings.
- The link between alcohol and several cancers has been known for decades, but the biological mechanisms are more recently understood.
- Alcohol is the third-leading preventable cause of cancer after obesity and tobacco.
- Researchers at Sylvester Comprehensive Cancer Center hope this advisory will influence public behavior and medical practices.
For years, researchers at Sylvester Comprehensive Cancer Center, part of the University of Miami Miller School of Medicine, have emphasized the risks of excessive alcohol consumption. The U.S. surgeon general recently issued a new advisory, recommending that all alcoholic beverages carry warnings about their link to cancer. This aligns with an extensive body of research conducted by Sylvester and others.
To monitor alcohol intake is now more crucial than ever. Increased awareness may help reduce alcohol consumption, leading to better health outcomes.
stated Susan B. Kesmodel, M.D., director of Breast Surgical Oncology and co-leader of the Breast Site Disease Group at Sylvester.
A Known Association Between Alcohol and Cancer
The link between alcohol and cancer, particularly breast and colorectal cancer, has been recognized for decades. However, the understanding of the biological mechanisms behind this association has only recently been clarified. Alcohol increases estrogen levels, which can promote cancerous growth, especially in breast cancer cases.
Emerging data not only links alcohol to cancer but also explains the biological and molecular processes of how it happens.
explained Jashodeep Datta, M.D., assistant director of transdisciplinary research at Sylvester and a surgical oncologist.
The surgeon general’s advisory details how alcohol contributes to cancer through various pathways. For instance, alcohol breaks down into acetaldehyde, a potent carcinogen that damages DNA.
Alcohol also leads to oxidative stress, increasing inflammation. This process alters hormone levels and enhances the absorption of carcinogens, all factors that can lead to cancer.
Each year, alcohol is responsible for approximately 100,000 cancer cases and 20,000 deaths in the U.S., surpassing the annual 13,500 alcohol-linked traffic fatalities. It is the third-leading preventable cause of cancer, following obesity and tobacco.
Can an Advisory Change Behavior?
A 2020 study revealed that less than half of Americans are aware of the increased cancer risk from higher alcohol consumption. Alcoholic beverages already carry warnings about impaired driving and pregnant women’s health. The proposed cancer risk warning could prompt a much-needed discourse on drinking habits.
In 2023, the World Health Organization (WHO) declared that no safe limit exists for alcohol consumption. The WHO had previously classified alcohol as a Group 1 Carcinogen in 1988. Despite this classification, only a few countries, including South Korea, require cancer warnings on alcohol labels. Ireland is projected to add such warnings by 2026.
Mikkel Sekeres, M.D., chief of the Division of Hematology at Sylvester and professor of hematology at the Miller School, highlighted the modifiable nature of alcohol consumption. “Unlike genetic risks, our alcohol intake can be changed, offering a real opportunity to reduce our risk of cancer,” he explained.
Gilberto Lopes, M.D., Sylvester’s associate director and medical director for international affairs, believes the new advisory could significantly influence public behavior and medical practices. “Growing awareness about the connection between alcohol and cancer risk might prompt individuals to reconsider their drinking habits,” he stated.
Dr. Patricia Jones, M.D., a hepatologist at Sylvester and associate professor at the Miller School, acknowledged that behavior change is not immediate. She emphasized the need for comprehensive efforts addressing underlying reasons for excessive drinking and alcohol use disorders.
Dr. Jones pointed out that mental health professionals play a vital role in addressing alcohol use disorders. She expressed hope for a sustained public awareness campaign focusing on the harms of alcohol consumption.
Changing Norms Around Alcohol Consumption
The surgeon general’s advisory also recommends reassessing the dietary guidelines for alcohol consumption, which currently advise up to two drinks daily for men and one for women. Previous reports suggested reducing the guidelines to one drink a day for men, but this recommendation has not yet been updated.
Alongside these guidelines, health experts and community groups are being encouraged to educate the public about the risks associated with alcohol. A comprehensive public push can shift drinking norms, transforming attitudes towards alcohol similar to successful anti-tobacco campaigns.
