Fast Talk 402: Fast Chats - Which Nutrition Gadgets are Worthwhile, Plus Health Impacts of Caffeine and Carbs
Dec 18, 2025
Explore the latest nutrition technologies that athletes are using, like sweat analysis and continuous glucose monitors. Discover the potential downsides of carbs and caffeine, including their effects on inflammation and gut health during exercise. The hosts discuss how wearable devices often fall short, lacking actionable insights for athletes. They emphasize the need for a balance between peak performance and long-term health. With a critical eye on emerging tech, the conversation sheds light on the complexities of nutrition science.
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Lab Accuracy Often Fails In Field Wearables
- Many lab-grade nutrition measurements struggle when translated into field wearables due to added variables and user error.
- The review concludes the wearable quest is noble but we're not there yet for reliable, actionable data.
Don't Rely On CGMs For Real-Time Racing
- Avoid relying on continuous glucose monitors for real-time athlete fueling because they lag and give limited value during rapid changes.
- Reserve CGMs for diabetics or wait for improved devices before using them as athletic tools.
Good Data Needs Action To Be Useful
- In-field sweat electrolyte devices can measure sodium and potassium reasonably well but lack evidence they improve performance.
- Measuring a number is worthless unless you have an actionable plan for it.