Everyone knows that gum chewing can sharpen focus and get the brain buzzing with increased blood flow. But what if there’s something even better? South Korean researchers think they’ve found it—chewing on wood. Yes, really.
A recent study found that chewing on wooden tongue depressors for just five minutes can significantly boost glutathione (GSH) levels in the brain. And why does that matter? Because glutathione is a powerhouse antioxidant that shields the brain from oxidative stress and is linked to sharper memory. In other words, swapping your gum for a wooden stick might just be a brain-boosting hack no one saw coming.
A Strange Yet Effective Experiment
Fifty-two university students in Daegu, South Korea, participated in the study, divided into two groups. Some chewed paraffin wax gum, while others were given wooden medical tongue depressors—basically, the same wooden sticks doctors use to check your throat. But instead of saying “ahh,” participants were told to chomp down, alternating between chewing and resting for five minutes.
Using advanced brain imaging, researchers measured changes in GSH levels in the anterior cingulate cortex—a part of the brain involved in decision-making, emotional regulation, and motivation. After the chewing session, participants were given cognitive tests. The results? Those who spent time chewing on wood had significantly higher GSH levels and outperformed their gum-chewing peers on cognitive tasks.
Why Is This Happening?
The exact mechanism remains unclear, but scientists have a few theories. One idea is that chewing increases cerebral blood flow, which delivers oxygen and nutrients to the brain. Since a lack of proper blood flow has been linked to cognitive decline, boosting it—even through something as simple as chewing on wood—could be beneficial.
Another theory is that the mechanical act of chewing stimulates the brain, similar to how exercise benefits cognition. Previous studies have shown that difficulty with chewing is associated with poorer cognitive function, suggesting a direct link between jaw movement and brain health.
What’s Next for This Research?
While the study results are compelling, the researchers acknowledge limitations. They only tested two materials—wood and gum—so it’s unclear whether other substances might have similar effects. Future research could explore different textures, chewing durations, and broader participant demographics to get a fuller picture.
For now, if you’re looking for an unconventional brain boost, maybe it’s time to ditch the gum and give chewing on wood a try. Who knows? The simple act of gnawing on a wooden stick might just be the mental edge you’ve been searching for.
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