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We often associate chewing with digestion, but what if the simple act of chewing could also enhance brain health and memory? A fascinating new study suggests that chewing harder foods—like wood—may boost cognitive function by increasing the levels of glutathione (GSH), a powerful brain antioxidant. This could mean that what we chew is just as important as the act of chewing itself.
How Chewing Harder Foods Boosts Brain Function
A study published in Frontiers in Systems Neuroscience tested how different chewing materials affect brain health. Researchers recruited 52 university students in South Korea and split them into two groups. One group chewed paraffin wax gum, while the other chewed wooden tongue depressors, similar to popsicle sticks.
Using Magnetic Resonance Spectroscopy (MRS), researchers measured the participants' glutathione levels before and after five minutes of chewing. They also had the students complete cognitive tests to assess their memory, attention, and thinking skills.
The results were surprising—those who chewed wood experienced a significant increase in glutathione levels in the brain, while those who chewed gum showed little to no change. Even more interestingly, the wood-chewing group performed better on memory tests than their gum-chewing counterparts.
Why Is Glutathione Important for the Brain?
Glutathione (GSH) is a naturally occurring antioxidant that helps protect brain cells from damage caused by oxidative stress. This type of stress occurs when harmful molecules called reactive oxygen species (ROS) build up in the brain, leading to cognitive decline, memory loss, and even neurodegenerative diseases like Alzheimer’s.
Since the brain requires a constant supply of oxygen and nutrients, maintaining high glutathione levels is crucial for cognitive function and long-term brain health. The study’s findings suggest that chewing harder foods could be a simple, natural way to increase glutathione levels, potentially slowing cognitive aging and improving memory.
The Link Between Chewing and Cognitive Health
The connection between chewing and brain health isn’t new. Research has previously shown that chewing gum can increase blood flow to the brain by 25-40%, stimulating the hippocampus—the part of the brain responsible for memory and learning. However, this new study takes things further by showing that what you chew matters just as much as the act of chewing itself.
BioMed Research International has also highlighted that tooth loss is a major risk factor for Alzheimer’s disease. The inability to chew properly reduces sensory input to the brain, which can negatively impact cognitive function. This further supports the idea that chewing harder foods may have long-term benefits for brain health.
Should You Start Chewing on Wood?
While the study's results are compelling, researchers caution that more studies are needed to confirm these findings. However, the evidence suggests that incorporating harder foods into your diet—like raw vegetables, nuts, or dried fruits—could have similar brain-boosting benefits.
Instead of always reaching for soft, processed foods, it might be time to add more crunch to your meals. If something as simple as chewing harder foods can improve brain function and memory, it’s definitely worth a try!