Stomach Acid Imbalance: What’s Really Behind Your Heartburn?
What if your heartburn isn’t caused by too much acid… but not enough? In other words, a stomach acid imbalance.
Yep — I know. It sounds backwards.
But when it comes to that burning, uncomfortable, can-someone-please-put-a-fire-exit-in-my-chest feeling… the story is very rarely what you think.
Most people assume that the answer to their symptoms is simple: acid reflux → too much acid → take antacids.
But for a LOT of people, that chain of logic is completely the wrong way round.
Let’s break it down 👇
The surprising truth about stomach acid imbalance
For many, heartburn and reflux are actually linked to low stomach acid — a condition called hypochlorhydria. And here’s the kicker:
👉 Every time you take antacids, PPIs or H2 blockers, you may be making the underlying stomach acid imbalance worse.
This is how people accidentally slip into a vicious cycle:
Low acid → poor digestion → bloating → pressure → acid creeping upwards → more meds → even lower acid…
…and round we go.
Now — this is NOT to say antacids don’t have a place.
Used occasionally? Totally fine.
Used regularly? That’s where things can unravel.
Prolonged low stomach acid has been associated with:
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Nutrient deficiencies
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Blood sugar dysregulation
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Fatigue
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More frequent digestive infections
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And a whole host of other issues linked to stomach acid imbalance
Antacids and their side effects
Before we go any deeper, remember that many antacids come with their own list of common side effects:
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Constipation
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Diarrhoea
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Nausea
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Low appetite
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Headaches
And PPIs (proton pump inhibitors) take things a step further by blocking the production of both stomach acid and pepsin — the enzyme that helps you break down protein.
No pepsin = poorly digested protein = bloating.
Bloating = pressure.
Pressure = reflux.
See how this ties together?
So what’s actually causing the symptoms?
Reflux happens when the valve (LES) between your oesophagus and stomach becomes leaky, usually because of pressure.
Why might that pressure happen?
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1. Hiatal hernia
Where the top of the stomach pushes upwards into the diaphragm.
2. Eating large meals
A very full stomach can push acid upwards.
3. Eating foods that don’t agree with you
Not “bad” foods — just “bad for you right now.”
Your carb tolerance may have changed. Your gut bacteria may have changed. You may be reacting to foods that were once fine.
4. Dysbiosis or SIBO
More gas → more pressure → more reflux.
5. Food intolerances
A sneaky and VERY common trigger.
Stomach acid: your first line of defence
This is a biggie that most people don’t realise:
Your stomach acid isn’t just for digestion — it’s part of your immune system.
If your stomach becomes too alkaline from long-term antacid use, it’s less able to kill harmful bacteria like salmonella or listeria.
This is why maintaining healthy acidity matters.
So when you take antacids repeatedly, your body may respond by trying to produce more acid to rebalance the stomach environment… which can create that yo-yo pattern of symptoms.
So what can you actually do?
This is where detective work comes in. You need to understand the root of your stomach acid imbalance.
Start with simple nutritional shifts:
✔️ Reduce refined carbs and white grains
✔️ Increase fibre (fruit, veg, nuts, seeds)
✔️ Cut back on added sugars
✔️ Try probiotic-rich foods — but gently, especially if SIBO is a possibility
Supplements that may help (depending on cause):
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High-quality magnesium
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Digestive enzymes
But the right choice depends entirely on why you’re experiencing symptoms — and this is where proper assessment matters.
Want to get to the bottom of it?
If you’re nodding along and thinking, “This is literally me,” then let’s chat.
You can book a FREE 30-minute call with me so I can get a clear picture of what’s going on and give you personalised guidance that actually works for your digestive system.
If you’d like to find out which approach would work best for your digestive health, you can book a FREE 30-minute call with me here. We’ll chat about what’s really going on in your gut and whether I’m the right person to help you get it back on track.
If you would like to speak to me about any aspect of your gut health, then please use this link to book into my diary for a FREE 30 minute chat so I can find out more about what is going on for you. Alternatively please use the ‘Learn More’ link below.
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