Strategies to reduce GI distress when using sodium bicarbonate 📝
How to unlock the benefits without the risks.
Gastrointestinal Symptoms Associated With Sodium Bicarbonate Supplementation Protocols: A Systematic Review
Study Details
This new systematic review included 101 studies examining GI symptoms following sodium bicarbonate supplementation 📚
Including reviewing strategies to reduce GI issues 🔍
Here are the key findings ⬇️
Key Findings
🤢 Common acute doses of 0.2–0.4 g/kg produced GI symptoms ranging from mild discomfort to severe nausea, vomiting, bloating, cramping and diarrhoea
📈 GI symptoms generally became more frequent or severe as the size of a single dose increased
🥄 A single dose of 0.3 g/kg, the most commonly studied protocol, clearly increased the risk of gastrointestinal symptoms
⬇️ Reducing the acute dose to 0.2 g/kg may lower symptom severity, but some athletes still experience substantial discomfort
⏱️ Spreading sodium bicarb intake across several hours appears to reduce GI symptoms
⚖️ Spread-dosing protocols may require a higher total dose of approximately 0.4–0.6 g/kg to maintain the intended performance benefits
📅 Multi-day loading protocols may reduce symptoms immediately before and during exercise
⚠️ Symptoms experienced after each dose across multi-day protocols were rarely measured consistently and effects were therefore unclear
💊 Enteric-coated capsules or tablets appear to provide meaningful protection against GI symptoms
🟡 Sodium bicarb mini-tablets suspended within a carb hydrogel also substantially reduced symptoms in several studies
🧪 These delivery methods may work by limiting the reaction between bicarb and stomach acid, reducing carbon dioxide production in the stomach
🍞 Consuming sodium bicarbonate alongside a carb-rich meal may reduce GI symptoms, but evidence is limited
🔄 No studies have directly compared all the leading symptom-reduction strategies, so it is not currently possible to determine which protocol works best
👤 Responses were highly individual, meaning a protocol that is well tolerated by one athlete may still cause substantial symptoms in another
Conclusion
Athletes should trial sodium bicarbonate protocols during training and individualise the dose, delivery form and timing rather than using a new strategy before competition 📝
The most promising approaches are spread dosing, enteric-coated products and carbohydrate-hydrogel mini-tablets, but stronger head-to-head research is still needed ✅
Reference
https://onlinelibrary.wiley.com/doi/10.1002/ejsc.70225
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