Study Finds Link Between Heavy Drinking and Colorectal Cancer Risk
Recent research suggests that heavy and persistent alcohol consumption throughout adulthood may significantly increase the risk of colorectal cancer. This study, published by the American Cancer Society, analyzed 20 years of data involving over 88,000 adults in the United States.
Participants in the study shared how much alcohol they consumed weekly at different life stages—ages 18 to 24, 25 to 39, 40 to 54, and 55 and older. Researchers categorized drinkers as “heavy” if they consumed more than 14 drinks a week, while “moderate” drinkers had between seven and 14 drinks weekly.
The findings revealed a clear association between heavy drinking over a lifetime and a heightened risk of colorectal cancer, particularly rectal cancer. Those defined as heavy drinkers were found to have a 25% increased risk of overall colorectal cancer and nearly double the risk specifically for rectal cancer when compared to lighter drinkers. In fact, heavy drinkers faced about a 91% higher risk of developing colorectal cancer compared to those who drank less.
Interestingly, the study did not find a strong pattern linking higher alcohol consumption to colorectal adenomas, which are precancerous polyps. However, individuals who had stopped drinking demonstrated a noticeably lower risk of non-advanced adenomas compared to current light drinkers.
Out of the nearly 88,092 participants, 1,679 were diagnosed with colorectal cancer during the study period. The authors cautioned that since this research is observational and relies on self-reported data, it has its limitations.
The researchers noted that ongoing heavy alcohol consumption could elevate colorectal cancer risks, while cutting back on drinking may help lower the risk of adenomas. They acknowledged that the relationship could differ based on where the cancer develops in the colon.
Health experts have long recognized the connection between alcohol consumption and cancer. Dr. Mark Hyman recently emphasized on his podcast how even moderate drinking could negatively affect various body systems due to metabolic stress and inflammation.
According to Dr. Hyman, alcohol impacts the liver, brain, gut, and hormones, often leading to a range of health issues. He warned that alcohol doesn’t just affect the body temporarily—it can create lasting damage over time.
Doctors suggest that reducing or eliminating alcohol intake can significantly decrease the risk of several cancers, including breast and colorectal cancers. Dr. Pinchieh Chiang, a clinician in San Francisco, highlighted that abstaining from alcohol for extended periods can yield significant health improvements, such as better blood pressure and liver function.
Overall, the message is clear: drinking less can lead to better health outcomes and lower cancer risks.
