A recent study published in the journal Cancer has highlighted a significant association between lifetime alcohol consumption and an increased risk of colorectal cancer. This research found that individuals with higher alcohol intake—defined as 14 or more drinks per week—were at a 25% greater risk of developing colorectal cancer, particularly rectal cancer, compared to those who consumed one drink or less per week.
The study tracked 88,092 participants over a median period of 14.5 years, during which 1,679 cases of colorectal cancer were identified. Notably, former drinkers exhibited a reduced risk of colorectal cancer, aligning their risk levels more closely with light drinkers. The findings suggest that lowering alcohol consumption could potentially mitigate cancer risk.
Erikka Loftfield, co-senior author and researcher at the National Cancer Institute, emphasized that the study is among the first to examine the relationship between long-term alcohol consumption and both colorectal adenoma and cancer risk. The data indicated that heavy drinking was correlated with a 91% higher risk of colorectal cancer compared to consistent light drinking.
Despite these insights, experts have cautioned about the limitations of the study, particularly the reliance on self-reported data. Timothy Cannon, a director at Inova, noted that the study raises questions regarding the accuracy of survey-based research.
Other lifestyle factors, such as obesity, type 2 diabetes, smoking, and high consumption of red and processed meats, also contribute to colorectal cancer risk. Meanwhile, unchangeable risk factors include age and personal or family medical history.
Given the rising incidence of colorectal cancer, particularly among younger people, healthcare professionals encourage further investigation into the role of alcohol in this trend and advise individuals to discuss their cancer risk with medical experts.