GLP-1 medications like Ozempic and Wegovy have transformed the weight-loss conversation, helping millions reduce appetite and lose weight. But alongside the dramatic results, a growing number of users are reporting an uncomfortable side effect that experts say deserves more attention: persistent acid reflux, pressure, and digestive distress.

Why Reflux Happens on GLP-1s

According to gut microbiome specialist and author of Get Off Your Acid, Dr. Daryl Gioffre, the real problem is what these medications are doing to digestion itself.

“GLP-1s work, in part, because they slow gastric emptying. In plain English: they put your digestion in a traffic jam,” says Dr. Gioffre. “Food sits in the stomach longer, the brain thinks you’re full, and that’s why appetite drops. But when food sits too long, it can ferment. Bacteria feed on that stuck food, gas builds up, and now you’ve got pressure pushing everything upward. That’s where the reflux starts.”

That pressure buildup is why many patients on GLP-1s experience symptoms like heartburn, burping, chest burning, nausea, throat irritation, and a feeling that food is “just sitting there” after meals. Dr. Gioffre explains that reflux on GLP-1s is often less about excess acid and more about delayed movement through the digestive tract. A 2025 study also linked GLP-1 receptor agonists with a higher risk of GERD in patients with type 2 diabetes.

“Think of your stomach like a highway,” he says. “GLP-1s slow the cars down. Now, food backs up, fermentation increases, gas is created, and that pressure pushes against the lower esophageal sphincter. When that valve opens, acid comes up. That’s reflux.”

He warns that constantly suppressing acid may miss the bigger issue entirely. “Acid is not the enemy. You need stomach acid to digest protein, absorb minerals, and protect the gut. The real issue to fix is: why is acid moving in the wrong direction?”

Could Gut Changes Be Driving “Ozempic Personality”?

Beyond reflux itself, some experts are also beginning to explore how long-term digestive disruption may impact mood and mental health. Because roughly 95% of serotonin is produced in the gut, ongoing microbiome imbalance and slowed digestion may influence the gut-brain connection in ways researchers are only beginning to understand. Discussions surrounding “Ozempic personality” and emotional blunting have increasingly surfaced online, with some users reporting lower motivation, increased anxiety, or changes in mood while taking GLP-1 medications.

How to Support Your Gut While on GLP-1s

For people experiencing reflux while on GLP-1s, Dr. Gioffre emphasizes that lifestyle changes matter just as much as medication. “First, work with your prescribing physician,” he says. “I’m not anti-medication for those suffering from obesity, but I am anti-using a drug long-term without changing the terrain that created the issue. I can understand GLP-1s being used as a bridge while implementing lifestyle changes. But if you don’t fix the gut, minerals, stress, and food quality, you’re just suppressing appetite while the underlying problem keeps building.”

His recommendations are easy to implement: eat smaller meals, avoid eating within three hours of bed, focus on fiber-rich, whole foods, and prioritize hydration and mineral intake.

“This is where my acid-kicking minerals become a game changer,” says Dr. Gioffre. “Add a scoop to water daily to flood the body with the minerals it’s missing like magnesium, potassium, calcium, and sodium bicarbonate, so you can calm the internal environment, reduce that gas and pressure buildup, and help things actually move again.”