Research from the American Cancer Society suggests that long-term heavy drinking could elevate the risk of colorectal cancer. This finding comes from a comprehensive study analyzing two decades of data from over 88,000 adults in the U.S.
The participants shared their average weekly alcohol intake during different age brackets: 18-24, 25-39, 40-54, and 55 and older. Notably, “heavy drinkers” were defined as those consuming 14 or more drinks weekly, while “moderate drinkers” consumed 7 to 14 drinks.
The results indicated a concerning link: ongoing heavy drinking during adulthood was notably tied to higher instances of colorectal cancer, especially rectal cancer. Specifically, those who drank heavily for a lifetime faced a 25% overall increase in colorectal cancer risk, which nearly doubled for rectal cancer alone.
Furthermore, compared to light drinkers, heavy drinkers exhibited an alarming 91% increase in risk for colorectal cancer. For precancerous conditions like adenomas, while current heavy drinkers didn’t show a strong risk pattern, those who had stopped drinking were at a significantly lower risk compared to current light drinkers.
Out of the participants, 1,679 were diagnosed with colorectal cancer. The authors emphasized that the study was observational, relying on self-reported data, which does have its limitations.
They suggest that habitual heavy drinking might raise colorectal cancer risks, whereas abstention could lower adenoma risks. However, this association might differ depending on tumor location.
While the connection between alcohol and cancer isn’t new, experts like Dr. Mark Hyman highlight that even moderate drinking can exert stress on various organ systems through inflammation and impaired detoxification. He warns that alcohol can adversely affect essential body systems, particularly the liver and brain.
Dr. Pinchy Chan noted in a previous discussion that extended periods of sobriety can lead to significant health improvements, including better blood pressure and liver function, which ultimately impact long-term risks of heart disease and strokes.
Moreover, Professor Chen pointed out that cutting back or altogether eliminating alcohol can gradually lower the risks linked to several cancers, including both breast and colorectal types.
