Women's Health May 13, 2026 0 Comments

Could Yawning Be Your Brain’s Secret Detox Hack? Here’s What New Science Reveals!

Ever caught yourself mid-yawn at the worst possible moment—like right when your boss drops a crucial point in a meeting—and thought, “Ugh, now everyone’s judging me”? Well, what if I told you that yawn might actually be doing your brain a solid? Yup, new research is shaking up what we thought about yawning, suggesting it could play a sneaky role in cleaning out your brain’s waste, giving your noggin a little rinse and refresh. It’s like your brain’s own secret detox session, triggered by that irresistible urge to yawn. Intriguing, right? But before you start using yawns as a full-on brain cleanse strategy, let’s dive into what this study really uncovered and what it means for all of us trying to keep our minds sharp and clear. Ready to get the scoop? LEARN MORE

3 min read

New research suggests yawning might help your ‘glymphatic system’—aka the brain’s waste clearance pathway.

In a small study of 22 participants who underwent MRI scans, yawning sent cerebrospinal fluid (or CSF) away from the brain. This suggests that it “reorganizes neurofluid flow,” per the researchers.

Experts suggest yawning might be a “potential backup system” for the brain, acting as a sort of backup pump to clear brain waste.

It can be hard to stop a yawn once the urge strikes, but now, new research suggests that going with it might be good for you. The latest study suggests that yawning might actually help “clean” your brain by facilitating fluid movement along brain waste-clearance pathways.

While yawning in the middle of your boss’s big work presentation might not ever be socially acceptable, you can at least console yourself with the knowledge that the yawn you just unleashed may help your brain.

Before you start yawning all day, every day in the name of health, know this: The study didn’t definitively prove that yawning is good for you—but it had some interesting findings that suggest a good yawn here and there might help more than hurt. Here’s the deal.

Meet the experts: Randy D’Amico, MD, neurosurgeon at Northwell’s Lenox Hill Hospital; Davide Cappon, PhD, neuropsychologist at Tufts Medical Center; W. Christopher Winter, MD, neurologist and sleep medicine physician with Charlottesville Neurology and Sleep Medicine and host of the Sleep Unplugged podcast

What did the study find?

In the small study, published in the journal Respiratory Physiology & Neurobiology, researchers recruited 22 participants and had them undergo MRI scans of their heads and necks. During those scans, participants were told to yawn, take deep breaths, try to stifle a yawn, and breathe normally.

Researchers discovered that yawning sent cerebrospinal fluid (CSF, a clear liquid that surrounds the brain and spinal cord) away from the brain. When people took a deep breath, the cerebrospinal fluid went the other way.

They also found that yawning and taking deep breaths increased blood flow away from the brain, creating room for more fresh blood to enter.

“These observations show that yawning is not simply an intensified breath but a distinct cardiorespiratory maneuver that reorganizes neurofluid flow,” the researchers wrote.

What’s the value in this?

It’s important to note that while the researchers found noteworthy CSF and blood flow movement in the brain after a yawn, they didn’t figure out why this is important. Still, the experts have some theories.

CSF cushions the brain and spinal cord, but it also helps to shuttle nutrients around and clear out metabolic byproducts your brain doesn’t need, explains Randy D’Amico, MD, neurosurgeon at Northwell’s Lenox Hill Hospital.

“In recent years, there has been increasing scientific interest in the so-called ‘glymphatic system,’ which is essentially the brain’s waste clearance pathway,” D’Amico says. “Impaired clearance has been discussed in relation to aging and neurodegenerative diseases—although this field is still evolving and these data are far from conclusive.”

All this to say, in theory, yawning may help support this waste-clearance pathway.

The study found that CSF and blood flowed out of the skull together in a coordinated way, which also strengthens that theory, points out Davide Cappon, PhD, a neuropsychologist at Tufts Medical Center.

“That said, this remains a hypothesis,” Cappon says. “The study does not show that yawning directly ‘cleans’ the brain, but it does highlight that yawning may have more complex physiological functions than we previously appreciated.”

What happens in your brain during a yawn?

Cappon points out that “yawning is actually a surprisingly complex neurological and physiological event” that involves a lot of networks and systems working together at once.”

“Over the years, yawns have been thought to have lots of potential benefits or roles,” says W. Christopher Winter, MD, neurologist and sleep medicine physician with Charlottesville Neurology and Sleep Medicine and host of the Sleep Unplugged podcast. (He lists off temperature regulation and helping the brain wake up as a few.)

Winter says the findings suggest that yawning is a potential backup system for the brain. “If you sleep well, the glymphatic system is doing its job,” he says. “If you are not sleeping enough—or well—then the yawn suddenly starts to feel like your brain saying ‘if you are not going to sleep properly and engage this glymphatic system, then we are going to turn on the back-up pump or hydraulic system.’”

What does this actually mean?

“The main takeaway is really about how dynamic the brain and body are,” Cappon says. “Even everyday behaviors like breathing, sleep, and yawning may influence brain physiology in ways we are still learning to understand.”

D’Amico adds that the findings stress that there’s a lot happening in the brain. “It relies on dynamic fluid circulation, sleep, vascular health, and physiologic rhythms to maintain normal function,” he says.

The next time you yawn, know that it might be more than just your body telling you that you’re tired. Yawning is an example of just how complex and smart our bodies can be.

Korin Miller is a freelance writer specializing in general wellness, sexual health and relationships, and lifestyle trends, with work appearing in Men’s Health, Women’s Health, Self, Glamour, and more. She has a master’s degree from American University, lives by the beach, and hopes to own a teacup pig and taco truck one day.

Carina Hsieh, MPH, is the deputy features editor of Women’s Health. She has more than a decade’s worth of experience working in media and has covered everything from beauty, fashion, travel, lifestyle, pets, to health.

She began her career as an intern in the fashion closet at Cosmopolitan where she worked her way up to Senior Sex & Relationships Editor. While covering women’s health there, she discovered her passion for health service journalism and took a break to get her Masters in Public Health. Post-grad school, she worked as a freelance writer and as The Daily Beast’s first Beauty, Health, and Wellness Reporter.

Carina is an alum of the Fashion Institute of Technology and the Yale School of Public Health. She and her French Bulldog, Bao Bao, split their time between Brooklyn and Connecticut. She enjoys reformer Pilates, (slow) running, and smelling the fancy toiletries in boutique fitness class locker rooms.