Why Reflux Isn't Always About Too Much Stomach Acid — Digestive Clarity Series (Part 7)
If you have reflux, there's a good chance you've heard that you have too much stomach acid.
It's one of the most common explanations for heartburn and reflux:
Too much acid → acid comes up → heartburn.
And there’s some truth to that.
Stomach acid absolutely can contribute to reflux symptoms and irritation of the esophagus. That's one reason medications that reduce acid production can be so effective for many people with GERD.
And if you’ve been exploring naturopathic approaches to GERD, you may have heard that not having enough stomach acid can actually look exactly like having too much stomach acid.
And there’s some truth to that too.
But there's a problem with thinking about reflux as simply an issue of too much or too little acid.
Because the truth of the matter is that most people with heartburn and acid reflux have completely normal stomach acid.
The question is not necessarily:
"Why am I making too much acid?"
but:
"Why is the stuff in my stomach coming back up in the first place?"
That takes us into a much bigger picture.
Reflux is about more than acid
Your stomach is supposed to contain acid.
That's part of normal digestion.
The problem occurs when stomach contents repeatedly move upward into the esophagus, which isn't designed to handle that exposure in the same way the stomach is. And what comes back up isn't necessarily just acid. It can include food, stomach contents, digestive fluids, and sometimes bile.
So reflux is really a problem of movement and containment.
Your digestive system has several mechanisms designed to keep stomach contents where they belong.
When those mechanisms aren't working well, reflux can occur.
The lower esophageal sphincter plays a big role
At the bottom of the esophagus is a ring of muscle called the lower esophageal sphincter, or LES.
Think of it as one of the body's main gates between the esophagus and stomach. It needs to relax when you swallow so food can enter the stomach. But it also needs to remain closed most of the time to prevent stomach contents from coming back up.
If that barrier isn't functioning properly, reflux becomes more likely.
And this is one reason why simply reducing stomach acid doesn't necessarily address the entire problem.
You can have perfectly normal stomach acid and still have a problem with what's happening at the top of the stomach.
A full stomach changes things
This is where meal size becomes important.
The stomach needs to expand when you eat.
That's normal.
But the more distended the stomach becomes, the more likely it is that stomach contents can move upward, particularly if the LES relaxes at the wrong time.
This is one reason people often notice reflux after:
very large meals
eating quickly
eating late at night
meals that are particularly high in fat
And it helps explain something patients sometimes find confusing:
"I can eat the exact same foods if I eat a small amount, but if I have a big meal, I get reflux."
It may not be the individual food.
It may be what that food did to the size and pressure inside the stomach.
Stomach emptying matters too
Your stomach isn't just a storage container.
After you eat, it needs to accommodate the meal, mix it with digestive juices, and gradually empty its contents into the small intestine.
If that process is slowed, the stomach may remain full for longer.
And the longer the stomach remains distended, the more opportunity there may be for reflux symptoms to occur.
This is particularly relevant for people who experience a combination of:
reflux
early fullness
bloating
nausea
belching
feeling like food sits in the stomach for hours
In these cases, the reflux may be connected to a broader problem with upper digestive motility rather than simply an excess of acid.
Your diaphragm helps too
The LES isn't working alone.
The diaphragm also plays an important role in the barrier between the stomach and esophagus.
This is one reason a hiatal hernia can contribute to reflux. A hiatal hernia occurs when part of the stomach moves upward through the opening in the diaphragm where the esophagus passes.
Not everyone with a hiatal hernia will have significant reflux, and not everyone with reflux has a hiatal hernia.
But when the anatomy of this area changes, the normal anti-reflux barrier can become less effective.
Then there are the things that trigger reflux
This is where food comes back into the picture.
Certain foods and beverages can make reflux symptoms worse in some people.
Common examples include:
fatty meals
chocolate
peppermint
coffee
alcohol
spicy foods
acidic foods
But there's an important distinction here.
A food that triggers reflux isn't necessarily causing the underlying problem.
For example, if chocolate consistently causes symptoms, you may reasonably decide that chocolate isn't worth eating right now.
But that doesn't necessarily mean chocolate damaged your LES or that you have developed a chocolate intolerance.
It may simply be making an existing reflux tendency more noticeable.
And, just like we've discussed throughout this series, your tolerance can change depending on the circumstances.
Stress can make reflux feel worse
The digestive system is closely connected to the nervous system.
Stress can affect stomach function, motility, sensitivity, and the way the brain interprets sensations coming from the digestive tract. This means two people can experience the same amount of reflux and perceive it very differently.
And it also means that your own symptoms can change from one day to another.
A stressful week may bring much more noticeable reflux than a relaxed week, even if your diet hasn't changed significantly.
That doesn't mean the reflux is "just stress." It means the nervous system is part of the digestive system.
Why acid suppression can still be helpful
This is an important point. The message here isn't:
"Reflux isn't about acid, so you don't need acid-reducing medication."
That's not what I’m saying at all.
For some people, acid suppression can be an extremely effective treatment. Proton pump inhibitors are an important part of conventional GERD treatment, particularly when there is inflammation or damage to the esophagus.
Reducing the amount of acid in the stomach can make refluxed material less irritating and give damaged tissue a chance to heal.
That's valuable.
But treating the acidity of reflux isn't necessarily the same thing as addressing why reflux is happening.
Sometimes we need to think about both.
The bigger picture
Reflux can involve many different pieces of the digestive system:
the lower esophageal sphincter
the diaphragm
stomach distension
gastric emptying
meal size and timing
food triggers
abdominal pressure
nervous system regulation
anatomy, including hiatal hernia
and, of course, the acidity and composition of what is refluxing
This is why two people with "GERD" can have very different experiences.
One person may primarily struggle with nighttime reflux.
Another may reflux immediately after large meals.
Another may have reflux along with early fullness and nausea.
Another may have persistent symptoms despite acid suppression.
The diagnosis may be similar.
But the underlying pattern may be very different.
And that pattern can give us important clues about what needs to be looked at more closely.
The takeaway
If you have reflux, it can be tempting to ask:
"How do I reduce my stomach acid?"
Sometimes that's an appropriate question.
But it's not the only one.
We need to know why this is happening in the first place.
Once we start asking that question, reflux becomes much more understandable.
We can look at the LES, stomach emptying, meal size, motility, anatomy, nervous system regulation, and the individual factors that make symptoms better or worse.
Because just like we've seen throughout the Digestive Clarity Series, the symptom itself is only part of the story.
The pattern tells us much more.
This is Part 7 of the Digestive Clarity Series. In the next post, we'll look at why eliminating more and more foods isn't always the answer — and why constantly shrinking your diet can sometimes keep you stuck.
