When heartburn strikes, people reach for all sorts of home remedies — and Sprite or 7Up comes up surprisingly often. The logic makes a kind of intuitive sense: it’s clear, it’s light, it doesn’t have caffeine. People have been drinking fizzy lemonade when their stomach feels off for generations. Surely it can’t make things worse?

Unfortunately, it can — and for most people with acid reflux, GERD, or LPR, Sprite is one of the last things you should reach for.

No, Sprite does not help acid reflux. Its combination of high acidity (pH around 3.3), carbonation, sugar load, and citric acid-based flavouring makes it genuinely problematic for reflux sufferers. In the majority of cases, drinking Sprite when you have acid reflux will make symptoms worse, not better.

Key Takeaways

Sprite has a pH of approximately 3.3, placing it firmly in the high-acidity range — well below what’s safe for acid reflux and LPR sufferers
Carbonation increases transient lower oesophageal sphincter relaxations (tLESRs), which directly allows acid to reflux upward
The sugar content slows gastric emptying and contributes to gut fermentation, increasing pressure on the LES
Citric acid — Sprite’s primary acidulant — is a known reflux irritant, particularly for LPR where pepsin reactivation in throat tissue is a concern
Large-scale prospective research shows soda intake is associated with increased GERD symptom risk
Diet Sprite is no safer — it has a similar or lower pH than regular Sprite and still contains carbonation and citric acid
Better alternatives when symptoms flare include alkaline water, chamomile tea, or Gaviscon Advance
The folk remedy that Sprite “settles the stomach” has no evidence base and likely originated from a conflation with ginger ale or plain sparkling water, neither of which is safe for reflux either

Why Sprite Makes Acid Reflux Worse

1. It’s Highly Acidic

Sprite’s pH sits at approximately 3.3, driven primarily by citric acid and carbonic acid. To put that in context: lemon juice is around pH 2–2.5, orange juice around 3.5, and black coffee around 4.5–5. Sprite is more acidic than coffee.

Research measuring the pH of nearly 400 commercially available beverages found that sodas as a category have a mean pH of 3.12 — placing the vast majority firmly in what researchers categorise as “erosive” territory [Reddy et al., General Dentistry, 2016]. For acid reflux sufferers, introducing a beverage with a pH of 3.3 into an already-irritated oesophagus is counterproductive.

For LPR sufferers in particular, this acidity matters even more. If pepsin from previous reflux events has deposited in your throat tissue, any acidic exposure — including drinking Sprite — can reactivate that pepsin and trigger fresh damage to laryngeal and pharyngeal mucosa. For more detail on how this mechanism works, see my complete guide to LPR.

2. Carbonation Directly Weakens the Lower Oesophageal Sphincter

This is the mechanism that most people don’t know about — and it’s arguably more damaging than the acidity for habitual drinkers.

A controlled study measuring the effect of carbonated beverages on LES function found that ingesting a carbonated drink significantly increased the frequency of transient lower oesophageal sphincter relaxations (tLESRs) compared to both baseline and plain water. It also reduced basal LES pressure from a mean of 40.5 mmHg at baseline to just 18.5 mmHg after drinking the carbonated beverage [Ravi et al., Indian Journal of Gastroenterology, 2012].

tLESRs are the main mechanism by which reflux occurs — the LES briefly opens, allowing stomach contents to rise. If Sprite is doubling the frequency of these relaxations while simultaneously halving the resting pressure of the sphincter, you are mechanically creating conditions for reflux to occur.

A systematic review of carbonated beverages and GERD confirmed that carbonation reduces LES basal pressure and causes short-term drops in oesophageal pH [Johnson et al., Alimentary Pharmacology & Therapeutics, 2010]. There is nuance here — the review noted that carbonated beverages have not been consistently shown to cause GERD at a population level in all studies — but for someone who already has reflux disease, adding a trigger that weakens sphincter function and introduces acid is not a sensible choice.

To understand more about how the LES works and why keeping its pressure up matters, read my article on the stomach sphincter and LPR.

3. The Sugar Load and Gut Pressure

A standard can of Sprite contains around 38g of sugar — roughly 9.5 teaspoons. This sugar load has two relevant effects for reflux sufferers.

First, it contributes to delayed gastric emptying. The more slowly the stomach empties, the longer the window during which reflux can occur. Second, excess sugar is fermented by gut bacteria, which produces gas. That gas builds pressure in the stomach and small intestine, which in turn puts upward pressure on the LES — the same mechanism that makes overeating a reflux trigger.

A large prospective cohort study of 167,574 participants found that consuming more than one serving per day of sugar-sweetened beverages was associated with a significantly higher risk of developing GERD compared to non-consumers [Liu et al., Nutrition Journal, 2025]. Sprite sits squarely in the sugar-sweetened beverage category.

4. Citric Acid — A Direct Reflux Irritant

Sprite’s distinctive lemon-lime flavour comes almost entirely from citric acid. While citric acid is a naturally occurring compound found in citrus fruits, it is also one of the most consistently identified dietary reflux triggers — particularly for LPR patients.

Citric acid is highly pepsin-activating. At a pH of 3.3, Sprite creates exactly the kind of acidic environment in the throat and oesophagus that reactivates dormant pepsin and triggers mucosal damage. This is the same reason I advise LPR patients to avoid lemon water, citrus juices, and lime — and Sprite contains a concentrated dose of the same acidulant.

What the Population Research Shows

Individual mechanistic studies paint a clear picture, but it’s worth knowing what large-scale prospective research shows too.

An analysis of data from the Nurses’ Health Study II — covering 48,308 women over 262,641 person-years of follow-up — found that soda intake was independently associated with increased risk of GERD symptoms. Replacing just 2 servings per day of soda with water was associated with a measurable reduction in GERD risk [Mehta et al., Clinical Gastroenterology and Hepatology, 2020].

A related study from the same cohort examined combined lifestyle factors and found that limiting coffee, tea, or soda intake to no more than 2 cups per day was one of five key factors associated with significantly lower GERD risk [Mehta et al., JAMA Internal Medicine, 2021].

This isn’t a marginal finding. The evidence that soda — including clear sodas like Sprite — increases GERD symptom risk is now supported by multiple prospective cohort studies.

Is Diet Sprite Any Better?

No. Diet Sprite (Sprite Zero) has a pH of approximately 3.14, which is marginally less acidic than regular Sprite but still firmly in the problematic range for reflux. It still contains citric acid, still contains carbonation, and still reduces LES pressure through the same mechanisms. The only thing diet Sprite removes is the sugar load — which is one benefit — but it does nothing about the acidity or carbonation that make fizzy drinks problematic for reflux in the first place.

Artificially sweetened beverages as a category have also been associated with increased GERD risk in prospective research, suggesting the sweetener substitution doesn’t resolve the underlying problem [Liu et al., Nutrition Journal, 2025].

Why Do People Think Sprite Helps?

It’s worth addressing this directly, because the belief is widespread enough to keep coming up.

The most likely explanation is a conflation with the folk remedy of drinking ginger ale when you have an upset stomach. Ginger ale has a genuine mechanism of action through ginger’s prokinetic and anti-nausea properties (though many commercial ginger ales contain very little actual ginger). People may have transferred this folk remedy to other clear or lemon-lime sodas, assuming the benefit was in the bubbles or the flavour rather than the ginger itself.

The second explanation is the burp effect. When people drink Sprite and then burp, they sometimes feel momentary relief from pressure — and briefly mistake this for reflux improvement. In reality, all that’s happened is that the gas has escaped, while the LES has been temporarily weakened and the acidic liquid is now in contact with the oesophageal lining.

What to Drink Instead When Acid Reflux Strikes

If you’re looking for something to drink that will actually help when symptoms flare, here are the options with genuine evidence or practical reasoning behind them:

Alkaline water (pH 8+): Higher-pH water can help neutralise acidic conditions in the oesophagus and dilute pepsin. A pH above 8 is ideal. Plain tap water is also fine. For more detail, see my article on alkaline water and LPR.

Chamomile tea: One of the most consistently reflux-friendly herbal teas. Chamomile has mild anti-inflammatory properties and is well-tolerated even by LPR patients. See my article on chamomile tea and acid reflux.

Baking soda in water: Half a teaspoon of baking soda dissolved in a glass of water creates a strongly alkaline solution that can neutralise oesophageal acid quickly. It’s a short-term fix rather than a long-term strategy, but it works for acute heartburn. See my article on baking soda for heartburn.

Gaviscon Advance: The most evidence-based over-the-counter option, particularly for LPR. It forms an alginate raft that physically blocks reflux at the top of the stomach rather than simply neutralising acid. It’s the option I recommend most consistently for people in acute symptom episodes.

Frequently Asked Questions

Does Sprite hurt heartburn?

Yes, for the majority of people Sprite will worsen heartburn rather than relieve it. The pH of 3.3, combined with carbonation that relaxes the LES, creates conditions that actively promote reflux events. The brief feeling of relief some people experience after drinking it and burping is not genuine improvement — it’s temporary pressure release.

What about 7Up for acid reflux?

7Up has a very similar composition to Sprite — lemon-lime flavouring, citric acid, carbonation, and comparable acidity (typically pH 3.2–3.5). The same concerns apply. Neither is a safe choice for acid reflux or GERD management.

What drinks soothe acid reflux?

Alkaline water (pH 8+), chamomile tea, marshmallow root tea, and plain still water are the most consistently helpful options. Drinks to avoid include all carbonated sodas (including Sprite and 7Up), coffee, alcohol, citrus juices, and most energy drinks.

Is sparkling water OK for acid reflux?

Plain sparkling water is less problematic than Sprite or other flavoured sodas because it lacks citric acid, sugar, and other additives — but it still contains carbonation, which can increase tLESRs and belching. For people with mild reflux, plain sparkling water in moderate amounts may be tolerable. For those with LPR or more severe GERD, I’d stick to still water.

What is the fastest way to neutralise stomach acid?

Baking soda mixed with water acts quickly and is widely accessible. Gaviscon Advance provides longer-lasting relief by forming a physical raft that blocks reflux. Alkaline water at pH 8+ provides gentler ongoing neutralisation. Of the three, Gaviscon Advance is the most clinically reliable option for acute symptom control.

Can I drink any soda if I have acid reflux?

Root beer tends to be the least acidic soda option (pH typically around 4.1–4.6) and is caffeine-free, making it the most tolerable choice for occasional soda consumption among reflux sufferers. However, even root beer still has carbonation and sugar, so it should still be consumed in moderation if at all. No soda is genuinely safe or beneficial for acid reflux — the question is only which ones are least damaging.

Conclusion

The short version: Sprite does not help acid reflux, and for most people — particularly those with GERD or LPR — it will actively make things worse. The combination of pH 3.3 acidity, carbonation that relaxes the LES, high sugar content, and concentrated citric acid makes it one of the worst choices you could make during a reflux episode.

If you find yourself reaching for fizzy drinks when symptoms hit, the drink you actually want is still water or alkaline water — not something carbonated, not something acidic, and definitely not something with 38g of sugar per can.

Managing reflux well comes down to understanding which foods and drinks support your recovery and which ones undermine it. This is exactly what the Wipeout Diet Plan is built around — not just a list of what to avoid, but a structured approach to what to eat and drink that actively helps reduce symptoms over time, particularly for GERD and LPR. If you haven’t explored it yet, especially if you’re finding it hard to make consistent progress, it’s worth a look.

And if you’d like personalised guidance on your specific situation, I’m available for a one-to-one consultation.

Research Sources

A controlled manometry study found that carbonated beverage ingestion more than doubled the frequency of transient LES relaxations and halved basal LES pressure compared to plain water in healthy subjects [Ravi et al., Indian Journal of Gastroenterology, 2012]. A systematic review of carbonated beverages confirmed they produce short-term oesophageal pH drops and transiently reduce LES basal pressure [Johnson et al., Alimentary Pharmacology & Therapeutics, 2010].

A pH analysis of 380 commercially available beverages found that sodas have a mean pH of 3.12, placing the majority in the erosive category for dental and oesophageal tissue [Reddy et al., General Dentistry, 2016]. A prospective cohort study of 48,308 women in the Nurses’ Health Study II found that soda intake was independently associated with increased GERD symptom risk, with water substitution reducing that risk [Mehta et al., Clinical Gastroenterology and Hepatology, 2020].

Higher sugar-sweetened beverage consumption was associated with a significantly elevated risk of developing GERD in a UK Biobank prospective cohort of 167,574 participants; artificially sweetened beverages showed a similar pattern [Liu et al., Nutrition Journal, 2025]. Limiting coffee, tea, or soda to no more than 2 cups per day was identified as one of five key lifestyle factors significantly associated with lower GERD risk in a combined dietary and lifestyle analysis [Mehta et al., JAMA Internal Medicine, 2021].

David Gray

Content Researcher & Author

✓ Peer-Reviewed Research Medical Content

David Gray founded Wipeout Reflux to address a critical gap in reflux management. His research synthesizes over 100 peer-reviewed studies on laryngopharyngeal reflux (LPR), pepsin biology, and GERD pathophysiology. For LPR specifically—a condition most physicians misdiagnose—his work focuses on pepsin reactivation and why standard PPI therapy fails most patients. He develops evidence-based protocols targeting root causes of both LPR and GERD, integrating emerging research on sphincter dysfunction, dietary interventions, and newer clinical approaches. Wipeout Reflux represents practical application of clinical science for patients seeking real solutions.

View all articles by David Gray

Does Sprite Help Acid Reflux? (The Honest Answer)