If you're waking up exhausted, battling daily brain fog, or finding your anxiety levels creeping up for no clear reason, the root of the problem could be hiding in an unexpected place: your tongue.
Recent research has linked obstructive sleep apnea (OSA) to tongue fat — a discovery that could change how doctors think about and treat the common sleep condition.
Your tongue is a major fat depot, and when you carry extra weight, that fat can accumulate in your tongue and block your airway while you sleep.
“I think tongue fat is a primary driver for the pathogenesis of sleep apnea,” said Richard Schwab, MD, a professor and co-director of the University of Pennsylvania Perelman School of Medicine’s Penn Sleep Center. Schwab has spent years studying how tongue fat contributes to OSA.
If you're one of the millions of women living with OSA, this information could change your life, Schwab said at a recent sleep medicine conference.
The Outsized Impact of Weight Loss
Doctors have long recommended that people with sleep apnea lose weight. Excess weight directly affects how the airway narrows or collapses during sleep, explaining why even modest weight loss can make a difference.
In a 2019 study of 67 patients, those who lost about 15% of their body weight (or 30 pounds for a 200-pound person) saw their sleep apnea severity improve by roughly 55%. Compared with changes to other upper-airway structures (like the soft palate and throat walls), a reduction in tongue fat was the strongest predictor of this improvement.
One patient’s apnea-hypopnea index score (a measure of sleep apnea severity) plummeted from 121 breathing interruptions per hour (severe) to just 25 — a difference that can have a life-changing impact on symptoms.
Can Weight Loss Drugs Target Tongue Fat?
Research in women with polycystic ovary syndrome (PCOS) suggests that GLP-1 agonist medications (popular drugs like Mounjaro, Ozempic, Wegovy, and Zepbound known for helping people lose a lot of weight) may specifically reduce tongue fat.
In a 2021 study, women with PCOS taking semaglutide (Ozempic, Wegovy) saw significant reductions in tongue fat volume, while a group taking a placebo saw a slight increase. That’s likely because the drug helped people lose more body fat overall, tongue fat included.
Other new research shows that tirzepatide (Zepbound, Mounjaro) can significantly help improve sleep apnea severity — a finding that led the FDA in 2024 to approve Zepbound for the treatment of sleep apnea.
The catch: These drugs can lead to muscle loss, too. Studies show that 15% to 60% of weight loss on GLP-1 medications comes from lean muscle mass if you're not actively protecting it. That means if you lose 50 pounds, up to 30 pounds of that could be muscle.
Muscle stokes your metabolism and helps you keep weight off long-term, so protecting it is important. Research shows total-body resistance training at least twice a week works best, along with eating 1 to 1.5 grams of protein per kilogram of body weight daily (20 to 30 grams per meal for someone who weighs 154 pounds).
What About Tongue Exercises?
Small studies have explored whether specific tongue and upper-airway exercises (like playing the didgeridoo, believe it or not) could help people with OSA. Results suggest that they might help as an added treatment alongside other therapies, but more research is needed to know for sure.
In the meantime, talk to your health care provider. Doctors don’t yet know if tongue fat returns when you stop taking GLP-1 medications, so you’ll want a comprehensive plan to protect your results.
Just remember: Every bit of fat you lose matters, even the kind you can’t see in the mirror.
