The discussion surrounding alcohol and its impact on health has persisted for years. It’s pretty well accepted that excessive drinking is harmful—most people agree on that. Researchers are aware that any regular consumption of alcohol has detrimental effects on liver health over time. Yet, interestingly, healthier individuals often indulge in alcohol, albeit in moderation. This pattern has fueled ongoing debates about whether light drinking might be beneficial or if it’s just a coincidence that healthier people occasionally enjoy a drink.
Recently, a new claim has emerged suggesting that champagne might be good for your health. It is said to potentially reduce the risk of sudden cardiac arrest, a serious condition where someone experiences a heart attack out of nowhere. While it’s often triggered by existing heart issues, it can strike unexpectedly.
From the standpoint of someone involved in epidemiology, like me, hearing this news was, well, a bit amusing. Allow me to break it down.
The research behind these headlines is based on a typical epidemiological study. The researchers analyzed a significant dataset from the British Biobank study, which contains various information—genetics, dietary habits, health outcomes, and more. This data helped them explore 125 risk factors and their connection to sudden cardiac arrest, factoring in age, sex, race, and recruitment site in their statistical model.
Out of the 125 risk factors examined, 56 showed some correlation to sudden cardiac arrest. These are mostly common findings: smoking is harmful, physical activity is beneficial, consuming more fruits and veggies is good, etc. The authors then conducted a less common analysis called Mendelian randomization. This method examines genetic factors related to specific behaviors—like a preference for sweets—to establish causality rather than mere association. So, if everyone with a gene linked to a sweet tooth also tends to face sudden cardiac arrest, it suggests a genuine connection.
In the final analysis, nine risk factors were identified as possibly having a direct relationship with sudden cardiac arrest, including champagne and white wine consumption. It appears that certain genes aligned with those drinks were associated with lower risks.
However, there are significant issues. First, Mendelian randomization relies on single-nucleotide polymorphisms (SNPs)—specific variations in genes that influence bodily functions. While this approach works effectively in straightforward genetic correlations, it becomes less reliable when many SNPs are related to one outcome. In this study, they used up to 524 SNPs, which requires numerous assumptions that may compromise the validity of the results. The most significant assumption being that these SNPs only influence heart attack risk through their connection to champagne consumption.
In the case of champagne, six SNPs are linked to how much one drinks. According to the researchers’ argument, the only reason these SNPs would affect heart attack risk would be through champagne consumption. This seems rather implausible, as factors influencing champagne intake—beyond financial means—mostly pertain to individual taste preferences, which also affect overall dietary choices. Essentially, people don’t possess “champagne-drinking genes.” They have genes that dictate their general preferences for food and drink, which could lead them to choose champagne, but drawing a direct line from genetics to champagne consumption to heart health is not convincing.
The second amusing element here, when I first encountered these headlines, is the concept of confounding. A classic example involves ice cream and drowning rates. More ice cream typically equates to a rise in drownings; these events correlate strongly. But it’s not that ice cream causes drownings—rather, warmer weather drives both increased ice cream sales and swimming activities, leading to more drownings. In this case, warm weather is the underlying factor affecting both behaviors.
Confounding applies to many areas of epidemiological research. In this situation, it’s clear that the authors missed an important correction for wealth or income. Individuals with higher incomes are more likely to enjoy champagne—a luxury item—and they generally have better health outcomes across the board. This oversight remains unaddressed in their analysis. Even with Mendelian randomization, it doesn’t completely resolve such issues. To claim that champagne prevents sudden cardiac arrest seems akin to suggesting that owning a Ferrari ensures you won’t default on your mortgage.
While this study is intriguing epidemiologically, revealing some associations worth further exploration, much of it reiterates previously known information. It’s no surprise that air pollution and high body mass index pose risks to health. Still, presenting the data in this manner could be valuable for those in the research field.
For the average person, however, the findings might feel insignificant. Yes, it’s conceivable that consuming champagne could have health benefits—anything is possible. Yet, it’s far more likely that these findings merely reflect yet another instance of coincidental correlation in the ongoing discourse about moderate alcohol consumption. So, if you feel like popping a bottle, do it for the joy of it, not because of perceived heart benefits.
