I cannot count how many people I talk to who've been on a proton pump inhibitor for five, ten, sometimes fifteen years, and they still feel terrible after meals. Still bloated. Still burning. Still cutting out every food that brings them joy. And nobody has ever once asked them WHY their stomach is acting up in the first place. That's the conversation we need to have.

The Story I Hear Over and Over

Someone shows up with a long history of heartburn. Maybe it started in a stressful season of life. Maybe it got worse during pregnancy or after a round of antibiotics. A doctor runs no tests, sees the symptom, and hands them a prescription for a proton pump inhibitor (PPI). They take it. The burning backs off a little. They assume the problem is solved.

Except it's not. Because six months later, they can't eat tomatoes, coffee, or anything remotely interesting without that familiar fire creeping up their chest. They've been told their body makes too much acid. So they just... keep suppressing it. Year after year.

Here's what nobody told them: the sensation of heartburn does not always mean excess stomach acid. In a lot of cases, it means the opposite.

Wait, Too LITTLE Acid? Yes. Really.

This is the part that genuinely blows people's minds when I first bring it up in a coaching session. The burning sensation of GERD (gastroesophageal reflux disease) comes from stomach contents touching the delicate tissue of your esophagus. That's real. But the reason those contents are refluxing in the first place is often not overproduction of acid.

Functional medicine practitioners point to a condition called hypochlorhydria, which is low stomach acid, as a frequently overlooked driver of reflux symptoms. Here's the short version of why: your lower esophageal sphincter (the valve between your esophagus and stomach) is triggered to close tightly by adequate stomach acid levels. When acid is too LOW, that valve doesn't get the right signal. It stays looser than it should. And even a small amount of acid splashing up into the esophagus burns, because esophageal tissue is not built to handle acid at all.

The Cleveland Clinic notes that GERD is one of the most common gastrointestinal diagnoses, yet the standard treatment protocol focuses almost entirely on reducing acid rather than investigating why the reflux is happening to begin with.

And here's the kicker: long-term PPI use has been associated in research with reduced stomach acid over time, altered gut microbiome composition, and potential nutrient absorption issues, including B12, magnesium, and calcium. A 2022 review published in Nutrients found that PPI use was linked to meaningful reductions in several key micronutrients. That does not mean PPIs are wrong for you, and many people need them. It does mean long-term use deserves a regular conversation with your doctor.

The Root Causes a Functional Medicine Coach Looks At

In functional medicine, GERD is not a disease to suppress. It's a signal. The body is telling you something upstream is off. When I'm working with someone on this, I want to look at several root-cause drivers.

Low stomach acid (hypochlorhydria). As I mentioned above, this is more common than people realize, especially as we age and especially in people under chronic stress. Stomach acid production requires adequate cortisol balance, zinc, B vitamins, and a calm nervous system. If any of those are depleted, acid output can suffer.

Gut motility issues. If food is sitting in your stomach too long (a condition called gastroparesis or simply slow gastric emptying), pressure builds and reflux becomes more likely. This is often connected to blood sugar dysregulation, thyroid function, and even the vagus nerve. A study published in the American Journal of Gastroenterology found a meaningful association between delayed gastric emptying and GERD symptoms.

H. pylori overgrowth. This bacterial infection in the stomach lining is incredibly common and is directly linked to both ulcers and GERD-like symptoms. It can be tested for. A lot of people have never been tested.

Hiatal hernia. A portion of the stomach pushing up through the diaphragm is a structural contributor to reflux that no amount of dietary tweaking will fully resolve on its own. Worth ruling out with a provider.

Dysbiosis and small intestinal bacterial overgrowth (SIBO). When bacterial overgrowth is present in the small intestine, fermentation produces gas that creates upward pressure on the stomach. SIBO and GERD show up together frequently, and research is increasingly exploring that connection.

Stress and the nervous system. The gut and brain are in constant two-way communication through the vagus nerve. Chronic stress slows digestion, weakens the esophageal sphincter's function, and increases sensitivity to what would otherwise be tolerable sensations. I see this all the time in people who notice their symptoms flare during hard life seasons.

The Habit Shifts That May Actually Help

I want to be clear: I am not telling you to stop any medication without talking to your doctor. What I am telling you is that you deserve to understand the full picture, and that there are lifestyle and habit changes worth exploring alongside whatever your provider recommends.

Slow WAY down at meals. I mean this literally. Chewing thoroughly, not eating on the run, and not inhaling food while standing over the sink are not small things. Digestion starts in the mouth. Amylase (a digestive enzyme) is released in saliva. When you bolt your food, you skip step one. Take twenty minutes for a meal. Put the fork down between bites. This is free, and it makes a measurable difference.

Don't eat two to three hours before lying down. Gravity is doing a lot of work for your digestive system. When you eat dinner and go horizontal an hour later, you are making the stomach's job dramatically harder. The American College of Gastroenterology recommends not lying down within two to three hours of eating as one of the first lifestyle changes to try for reflux management.

Look at what you're drinking, not just what you're eating. Carbonated beverages, including sparkling water, expand in the stomach and increase pressure. Alcohol relaxes the lower esophageal sphincter. Large amounts of liquid with meals can dilute digestive enzymes and slow things down. I'd rather see someone sip a small amount of warm water with a meal than chug a kombucha.

Elevate the head of your bed. Not just propping up on pillows (that can actually increase abdominal pressure) but placing blocks or a wedge under the actual head of the bed frame. Even a six-inch elevation makes a real difference for nighttime reflux, according to research summarized by the National Library of Medicine.

Address the stress, not just the food. I know this sounds like a cop-out, but it is one of the most clinically relevant pieces of the puzzle. Breathwork, prayer, a ten-minute walk after dinner, turning off the news at 8 PM. Whatever brings your nervous system out of fight-or-flight and into rest-and-digest mode. Your vagus nerve is literally regulating your digestion. Tend to it.

Work with a practitioner on testing. A stool test for H. pylori, a SIBO breath test, basic bloodwork for thyroid and nutrient levels, even a review of your current supplement regimen (some things, like fish oil in large doses, can aggravate reflux). These are reasonable next steps that a good functional medicine-informed provider can walk you through.

What I See in People Who Start Making These Shifts

I'm not going to oversell this. Some people's GERD has a structural component, an infection that needs treatment, or a level of esophageal damage that requires medical management. Real talk.

But I will tell you that many people who slow down their eating, clean up their food quality, address their stress load, and work with a provider to actually investigate the root cause report real changes: less burning, better digestion overall, and more food freedom over time. Not because they found some magic protocol, but because their body was finally getting what it needed to do its job.

And honestly, that's what this is about. We were designed with extraordinary self-regulating, self-healing capacity. The body is not your enemy. When something is chronically wrong, it's asking you to look upstream, not just silence the alarm.

I think about that a lot. We've been given these bodies to steward. And stewardship, to me, means asking the hard questions, not just taking the easy pill that makes the discomfort quieter without ever finding out why it was there.

A Note on Elimination and Real Food

There's a lot of noise online about which specific foods "cause" acid reflux. And yes, common triggers like alcohol, refined carbohydrates, fried food, and excess caffeine are worth paying attention to. But the approach of just avoiding a list of trigger foods for the rest of your life is not the same as healing the underlying dysfunction.

In my experience, people who eat a whole-food, anti-inflammatory diet, with quality protein, lots of vegetables, healthy fats, and minimal processed food, tend to have a much easier time with digestive symptoms across the board. Not because any one food is magic, but because the overall inflammatory burden is lower, blood sugar is more stable, and the gut lining is better supported.

If you have not already made that shift and you're struggling with GERD, that is where I would start. Real food is not the whole answer, but it is almost always part of it.

Disclaimer

This article is for general informational purposes only and is not medical advice. Always consult a qualified healthcare professional before making changes to your diet or health routine.

Key Takeaways

  • GERD is a signal, not a sentence. It has root causes worth investigating, not just suppressing.
  • Low stomach acid, not excess acid, may be a driver of reflux for many people, especially those under chronic stress.
  • Long-term PPI use is associated with micronutrient depletion and gut microbiome changes, raising questions beyond short-term symptom relief.
  • Gut motility issues, H. pylori, SIBO, hiatal hernia, and nervous system dysregulation are all root-cause drivers worth evaluating.
  • Slowing down at meals, not lying down soon after eating, reducing carbonated drinks, and tending to stress are evidence-informed habit shifts.
  • A whole-food, anti-inflammatory diet is not a complete fix on its own, but it's almost always part of the picture.

Frequently Asked Questions

Can low stomach acid cause GERD and heartburn symptoms?

Yes, and this is one of the most overlooked pieces of the puzzle. When stomach acid is too low, the lower esophageal sphincter may not receive the right signal to stay tightly closed. Even small amounts of stomach contents reaching the esophagus cause burning, because esophageal tissue is not designed to handle acid at any level. Low stomach acid (hypochlorhydria) is worth investigating, especially in people under chronic stress or those who have been on PPIs long-term.

What does a functional medicine doctor look for with GERD that a regular GI doctor might miss?

A functional medicine approach tends to investigate root-cause drivers like low stomach acid, H. pylori infection, small intestinal bacterial overgrowth (SIBO), delayed gastric emptying, structural issues like hiatal hernia, nutrient deficiencies, and the role of chronic stress and the nervous system. Standard GI care often focuses on symptom management through acid suppression without investigating these upstream factors.

Are there risks to taking PPIs long-term for acid reflux?

Research has associated long-term PPI use with reductions in key micronutrients including B12, magnesium, and calcium, as well as changes to the gut microbiome. This doesn't mean PPIs are always wrong for every person, but it does mean they deserve ongoing conversation with your provider rather than indefinite, unreviewed use. Always talk to your doctor before changing or stopping any medication.

What lifestyle changes may help GERD naturally?

Some of the most evidence-informed habit shifts include eating slowly and chewing thoroughly, not lying down within two to three hours of eating, elevating the head of the bed, reducing carbonated beverages and alcohol, managing chronic stress through breathwork or movement, and eating a whole-food anti-inflammatory diet low in refined carbohydrates and processed food. These won't replace medical care where it's needed, but they address real drivers of reflux that acid suppression doesn't touch.

Sources

This article is for general informational purposes only and is not medical advice. Always consult a qualified healthcare professional before making changes to your diet or health routine.