For many people, having a glass of wine with dinner or a beer with friends feels like a normal part of life. Alcohol is often linked to celebrations, relaxation, and social events.
However, scientists have been uncovering a growing number of health risks associated with drinking. For years, research has shown that alcohol can increase the risk of several cancers, including cancers of the mouth, breast, liver, and colon. Now, a new study suggests that another highly dangerous cancer should be added to that list: pancreatic cancer.
The research was led by scientists at the University of Victoria’s Canadian Institute for Substance Use Research, also known as CISUR. The study was published in the International Journal of Alcohol and Drug Research. The researchers say their findings add strong evidence that alcohol use can contribute to the development of pancreatic cancer.
Pancreatic cancer is one of the deadliest forms of cancer. The pancreas is an organ located behind the stomach. It plays a vital role in digestion and helps regulate blood sugar by producing important hormones such as insulin.
Unfortunately, pancreatic cancer is often difficult to detect in its early stages because symptoms can be vague or may not appear until the disease has already spread. As a result, survival rates remain very low. In Canada, only about 12 percent of people diagnosed with pancreatic cancer are still alive five years later.
To investigate the possible connection between alcohol and pancreatic cancer, the researchers performed what is known as a systematic review and meta-analysis.
Rather than conducting a single experiment, they carefully examined and combined findings from many earlier studies. The studies they reviewed were cohort studies, which follow groups of people over long periods and record their health outcomes and lifestyle habits.
One important issue the researchers paid close attention to was something called former drinker bias. In some studies, people who used to drink heavily but later quit are grouped together with people who never drank alcohol or drank only rarely.
This can create misleading results because former heavy drinkers may still experience long-term health effects caused by years of alcohol use. If these people are counted as non-drinkers, the true risks of alcohol can appear smaller than they really are.
The researchers adjusted their analysis to account for this problem. They also considered other factors that might affect cancer risk, including age, smoking habits, and socioeconomic status. After making these adjustments, they found a clear dose-response relationship.
This means that the more alcohol people consumed, the higher their risk of developing pancreatic cancer became.
The study found that drinking more than 24 grams of alcohol each day was associated with a 10 percent to 30 percent increase in pancreatic cancer risk. Twenty-four grams of alcohol is equal to a little less than two standard Canadian alcoholic drinks.
Scientists are still studying exactly how alcohol may contribute to pancreatic cancer. One possibility is that alcohol and its breakdown products can damage cells and DNA. Long-term alcohol use may also promote inflammation, increase oxidative stress, and affect how cells repair themselves. Over time, these changes may increase the likelihood that cancer develops.
The findings add to growing evidence that there may not be a completely safe level of alcohol consumption when it comes to cancer risk. Many people think only heavy drinking causes serious health problems, but this study suggests that even amounts that some people consider moderate may still increase the risk of a particularly deadly disease.
In reviewing these findings, the study makes a strong case that pancreatic cancer should be recognized as another alcohol-related cancer. The researchers used rigorous methods and carefully addressed biases that may have weakened earlier studies.
Although the increase in risk may appear modest, pancreatic cancer is extremely serious and often fatal, meaning that even relatively small increases in risk deserve attention. The findings also highlight the importance of providing clear information about alcohol’s health effects so that people can make informed decisions about their drinking habits.
If you care about cancer, please read studies that a low-carb diet could increase overall cancer risk, and vitamin D supplements could strongly reduce cancer death.
For more information about health, please see recent studies about how drinking milk affects the risks of heart disease and cancer and results showing higher intake of dairy foods linked to higher prostate cancer risk.
Source: University of Victoria.
