Part 2 of 2 · Part 1 covers acid reflux and GERD
If antacids or long-term reflux medication haven't actually fixed your symptoms, here's a real possibility worth raising with your doctor: you might have too little stomach acid, not too much, and taking the wrong treatment could actually be making things worse. Part 1 covered acid reflux, where too much acid ends up in the wrong place. Its opposite gets far less attention: not having enough stomach acid to begin with. Low stomach acid is genuinely underdiscussed, and it often gets mistaken for the exact condition it isn't, since the symptoms overlap so heavily.
Why stomach acid matters more than people realize
Stomach acid does two essential jobs: breaking food down for digestion, and killing off harmful microbes you swallow along with your food. Its normal level is genuinely strong acid. When your body makes too little, both of those jobs suffer at once.
The confusing overlap with reflux
Symptoms of low stomach acid, bloating, fullness, discomfort after eating, can look almost identical to acid reflux, and undigested food fermenting in your gut can actually produce gas that pushes upward, carrying a trace of stomach acid into your throat and feeling exactly like classic heartburn. This means some people treating themselves for too much acid may actually have too little, and taking an antacid in that situation doesn't fix the real problem at all.
A common, medication-driven cause
Long-term use of proton pump inhibitors, one of the most widely prescribed types of medication in the world, is a leading cause of low stomach acid. Research comparing long-term users to non-users found significantly lower gut bacteria diversity and a meaningfully different bacterial makeup, a real, measurable effect from a medication many people take for years without ever revisiting whether they still need it.
What it does to nutrient absorption
Enough stomach acid is necessary for absorbing protein, vitamin B12, iron, calcium, and magnesium properly. Low stomach acid can lead to real, measurable deficiencies in these even when someone's diet looks perfectly adequate on paper, since the acid needed to actually extract and absorb these nutrients simply isn't there in sufficient amounts.
If you've been managing what you assumed was reflux with antacids or long-term PPI use without any real improvement, bring this up directly with your doctor, since the two conditions need genuinely different management, and taking acid-suppressing medication for a low-acid problem can make things worse rather than better. Eating protein first at each meal helps stimulate your body's natural acid production, and saving drinks for after your meal rather than during it gives your stomach more time to work properly. Chewing thoroughly and eating without rushing matters here too, since your teeth doing more of the work becomes more important when your stomach acid is already falling short. If you've been on a PPI long-term, ask your doctor whether a periodic reassessment or a tapering plan makes sense for you, rather than assuming it's a lifelong prescription that never needs revisiting.
This content is for educational purposes only and is not a substitute for professional medical advice.