The Truth About Baking Soda for Health and Fitness

Baking soda, formally known as sodium bicarbonate, is a household staple often found in kitchens for baking or cleaning. Recently, it has gained traction in wellness circles as a "miracle" remedy for everything from acidity-related digestive issues to enhancing physical endurance. But what does the science actually say about consuming this common ingredient?

The Physiology of Baking Soda

Sodium bicarbonate acts as a buffer in the body, which means it helps regulate pH levels. When taken orally, it neutralizes stomach acid, which is why it has historically been used in over-the-counter antacids. Research published by institutions like the National Institutes of Health suggests that while bicarbonate can temporarily reduce the discomfort of heartburn, it is not a treatment for chronic conditions like gastroesophageal reflux disease. Relying on it frequently can mask underlying digestive issues that require a formal medical evaluation.

Its proposed uses fall into two main buckets: digestive relief and exercise performance. The evidence is clearer for short-term acid neutralization than for broad wellness claims, and the trade-offs become more important once side effects are considered.

Digestive Use vs Exercise Use

Use case	What it may do	What the evidence suggests
Digestive discomfort	Neutralizes stomach acid temporarily	May ease short-term heartburn discomfort, but does not treat chronic conditions like GERD
High-intensity exercise	Buffers hydrogen ions linked to muscle fatigue	Some studies show modest benefits for short-duration anaerobic performance, while endurance benefits remain inconclusive

From a metabolic perspective, some studies in peer-reviewed sports journals have explored its use among athletes. During high-intensity exercise, the body produces hydrogen ions, which contribute to muscle fatigue. Theoretically, increasing blood bicarbonate levels can buffer these ions, potentially delaying exhaustion. However, the evidence is mixed. While some studies show modest improvements in short-duration, high-intensity anaerobic performance, the benefits for endurance training remain inconclusive. Furthermore, common side effects include gastrointestinal distress, such as bloating, nausea, and diarrhea, which can more than offset any potential performance gain.

Risks and Practical Considerations

It is important to approach the intake of baking soda with caution. Because it is high in sodium, excessive consumption can lead to electrolyte imbalances, fluid retention, and potentially dangerous shifts in blood pressure. For individuals with hypertension, kidney disease, or those on sodium-restricted diets, increasing dietary sodium through supplements like baking soda is generally discouraged by cardiovascular health organizations.

If you are considering changes to your supplement routine for digestive or fitness purposes, the most reliable path is to focus on lifestyle fundamentals. For digestion, maintaining a balanced diet, eating slowly, and staying hydrated are far more effective and safer than relying on chemical buffers. For fitness, consistent training, proper periodization, and adequate nutrition remain the primary drivers of progress. Always prioritize evidence-based practices over health trends that prioritize quick fixes. If you have persistent symptoms or specific training goals, consult with a registered dietitian or a healthcare provider to develop a plan that is both safe and tailored to your individual needs.