In a recent study, scientists have made strides in understanding why some people experience headaches after consuming red wine.
The research suggests that a naturally occurring flavonol called quercetin, found in red wines, may disrupt the body’s alcohol metabolism, leading to the accumulation of toxins responsible for sudden headaches.
Quercetin, present in various fruits and vegetables, including grapes, berries, onions, and broccoli, transforms into a different form called quercetin glucuronide in the bloodstream.
According to Andrew Waterhouse, a coauthor of the study and a wine chemist, this form inhibits the metabolism of alcohol, possibly contributing to the headaches associated with red wine consumption.
The study highlights that red wine contains significantly higher amounts of phenolic compounds, especially flavonoids, compared to white wine.
This high concentration makes red wine a leading candidate responsible for headaches.
Researchers aimed to uncover why even those who don’t experience headaches from other alcoholic beverages may still be affected after just one or two glasses of red wine.
The study focused on how quercetin might impact a genetic variant of the enzyme ALDH2, crucial for alcohol metabolism.
Individuals with a less active variant of this enzyme, affecting nearly 8% of the global population and around 40% of East Asians, may experience skin flushing, heart palpitations, and headaches after drinking.
The breakdown of alcohol in the liver involves the enzyme alcohol dehydrogenase, converting it into acetaldehyde, a well-known toxin.
The enzyme ALDH2 transforms acetaldehyde into less toxic acetate.
The study suggests that quercetin glucuronide interferes with this process, potentially leading to the buildup of acetaldehyde and subsequent headaches in susceptible individuals.
However, experts not involved in the research caution that the study proposes a theory rather than providing definitive proof.
Dr. Jonas Spaak, an associate professor of cardiology, emphasizes the need for human samples and tests to validate the proposed mechanism.
The authors plan to test their hypothesis in a small clinical trial comparing red wines with high and low quercetin content.
While acknowledging that all alcohol consumption is for enjoyment only, experts recommend moderation to minimize potential harm.
Additionally, trying wines from different producers and grape varieties may help reduce headaches, as the levels of headache-triggering compounds vary among different wines.
Ultimately, the study suggests that choosing cheaper red wines or opting for white wines with lower flavonol content could be alternatives for those prone to wine-induced headaches.
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