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What is better for upset stomach, coke or Sprite?

4 min read

According to a 2025 review of decades of medical literature, there is no scientific evidence that soda, flat or otherwise, is beneficial for rehydration during illness. So, when facing the age-old question, 'What is better for upset stomach, coke or Sprite?', the surprising truth challenges conventional wisdom.

Quick Summary

Neither Coke nor Sprite is a recommended remedy for an upset stomach due to high sugar content and inadequate electrolyte levels, though Sprite is marginally better as it lacks caffeine; optimal choices include clear liquids like water or electrolyte drinks.

Key Points

  • Neither is Recommended: Health experts largely agree that neither Coke nor Sprite is a good remedy for an upset stomach due to high sugar content and poor electrolyte levels.

  • Avoid Caffeine: Sprite is marginally better than Coke for an upset stomach because it is caffeine-free, whereas Coke's caffeine can worsen nausea and dehydration.

  • High Sugar is Detrimental: The high sugar in both sodas can exacerbate symptoms like diarrhea and may irritate a sensitive stomach.

  • Carbonation Can Aggravate: For some, the bubbles can help with burping, but for others, the carbonation can increase gas and bloating, making discomfort worse.

  • Choose Better Alternatives: Safer and more effective options include electrolyte beverages, clear broths, and herbal teas (especially ginger), which properly rehydrate and soothe the stomach.

  • Recognize When to See a Doctor: Persistent or severe symptoms like prolonged vomiting, high fever, or dizziness warrant a doctor's visit, not sugary sodas.

In This Article

The Truth About Carbonated Drinks for Stomach Aches

For decades, people have reached for a can of soda when they feel nauseous or have an upset stomach. It's a common folklore remedy passed down through generations. The supposed benefits include the carbonation settling the stomach and the sugar providing a quick energy boost. However, scientific evidence largely contradicts this, and doctors often advise against it. The effectiveness is largely anecdotal and may be more related to the psychological comfort of a familiar routine than any true medicinal properties.

Why Neither Coke Nor Sprite Is a Good Remedy

When it comes to treating an upset stomach, the primary goals are to stay hydrated and avoid irritating the gastrointestinal (GI) tract further. This is where both Coke and Sprite fall short, though for slightly different reasons.

First, both sodas are high in sugar. When you have an upset stomach, particularly with diarrhea, a high sugar load can pull water into the digestive tract, potentially making diarrhea worse and hindering proper rehydration. For cases of simple nausea without diarrhea, the sugar can still upset a sensitive stomach.

Second, the carbonation itself can be a double-edged sword. While some people find that the fizz helps them burp and relieves pressure, for others, it can increase bloating and gas, exacerbating discomfort. The bubbles add air to your already sensitive digestive system, which can cause further distress.

The Caffeine Factor: Why Sprite is Marginally Better

Between the two, Sprite holds a slight advantage because it is caffeine-free. Coke, being a cola, contains caffeine, which is a diuretic that can contribute to dehydration. Additionally, caffeine is known to irritate the stomach and can make nausea and acid reflux worse. In a direct comparison, therefore, Sprite is the lesser of two evils for an upset stomach.

Comparison Table: Coke vs. Sprite for Upset Stomach

Feature Coke Sprite
Caffeine Content Yes No
Sugar Content High High
Acidity High (Phosphoric Acid) High (Citric Acid)
Electrolyte Replacement Poor Poor
Dehydration Risk Higher (due to caffeine) Present (due to high sugar)
GI Irritation Higher (caffeine + dark color) Lower (caffeine-free + clear)

Healthier and More Effective Alternatives

Instead of turning to soda, several other liquids and foods are much more beneficial for a queasy stomach. The key is to choose fluids that are easy to digest, help with rehydration, and don't exacerbate symptoms.

  • Electrolyte drinks: Beverages like Gatorade or Pedialyte are specifically designed to replenish lost fluids and electrolytes from vomiting and diarrhea, offering a far superior rehydration solution. For those who want to avoid artificial ingredients, there are also natural electrolyte powders available.
  • Clear broths: Chicken or beef broth can help rehydrate while also providing a small amount of electrolytes and calories. It's a gentle option that is often well-tolerated.
  • Herbal tea: Peppermint, chamomile, or real ginger tea can be soothing. Ginger, in particular, has long been recognized for its anti-nausea properties. However, be wary of commercial ginger ale, which often contains very little real ginger.
  • Plain water: Sipping small, frequent amounts of plain water is always a good choice for hydration. If water alone is too bland, adding a squeeze of fresh lemon can sometimes help.
  • BRAT diet: For those who can tolerate food, the BRAT diet (bananas, rice, applesauce, toast) is recommended. These bland foods are easy to digest and can help bind stools if diarrhea is a problem.

When to Avoid Soda and Seek Medical Advice

While a mild upset stomach may resolve on its own, it's important to recognize when symptoms warrant more attention. You should avoid soda entirely and seek medical help if you experience prolonged symptoms, especially dehydration. Persistent vomiting for more than 24 hours, extreme dizziness, blood in vomit or stool, and a high fever are all signs that you should consult a doctor. Soda is not a medical treatment and can do more harm than good in serious cases.

The Placebo Effect and Why We Keep Reaching for Soda

The powerful psychological effect of a childhood remedy cannot be understated. Many people associate the act of drinking a soda with feeling cared for and getting better, which can create a placebo effect. The comforting ritual may make them feel temporarily better, even if there's no underlying physiological benefit. For simple indigestion caused by overeating, the carbonation might help release some gas, but this is a very different scenario from a viral infection or dehydration. Understanding the difference between a placebo effect and a real remedy is crucial for making the best health decisions.

For more information on proper hydration and nutrition during illness, you can visit the CDC website.

Conclusion: Making the Right Choice

In the face of an upset stomach, the question of whether to choose Coke or Sprite is really a distraction from better options. Neither soda is truly beneficial for rehydration or treating the root cause of digestive distress. Sprite is the less harmful option due to its lack of caffeine, but its high sugar content remains a concern. The best approach is to choose clear, non-sugary liquids like water, broths, or electrolyte drinks, and to listen to your body. For prolonged or severe symptoms, it's always wisest to consult a healthcare professional rather than relying on a sugary, carbonated folk remedy.

Frequently Asked Questions

No, flattening soda by stirring out the carbonation does not remove the high sugar content or add beneficial electrolytes. While it might remove some of the bloating risk from bubbles, it does not make it a good rehydration fluid.

Any temporary relief is likely due to the placebo effect or a brief sugar boost. For simple gas or indigestion, the carbonation might provide temporary relief by helping with burping, but this is not a medical cure.

Electrolyte solutions like Pedialyte or sports drinks are the best choice for rehydration because they replace the necessary salts and minerals lost during illness. Water is also a good option, especially if taken in small sips.

Diet soda is not recommended as a remedy for an upset stomach. While it lacks sugar, the artificial sweeteners can cause GI distress and the carbonation can still lead to bloating.

Caffeine is a diuretic, which promotes fluid loss and can worsen dehydration. It can also act as a gut irritant, increasing nausea and stimulating bowel movements, which is unhelpful for diarrhea.

Most commercial ginger ale contains very little, if any, real ginger and is mostly just sugar and carbonated water. For a true ginger benefit, a tea made from real ginger root is far more effective for nausea.

Consider clear broths, herbal teas (peppermint or ginger), and electrolyte-fortified drinks. You can also try sucking on ice chips or bland foods from the BRAT diet (bananas, rice, applesauce, toast) if you can tolerate them.

References

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Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.