Boundless Life The Weirdest, Most Shocking Things You Can Learn About Your Body From A Blood Glucose Monitor with Josh Clemente
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Jan 10, 2026 Josh Clemente, founder and CEO of Levels, shares insights from his journey as a systems engineer at SpaceX to a metabolic health advocate. He discusses how coffee can spike glucose levels and the importance of context in interpreting continuous glucose monitoring data. The impact of alcohol on glucose, the benefits of red light exposure, and the influence of female hormones on insulin sensitivity are also explored. Josh emphasizes the power of monitoring for behavior change and the future of predictive health using technology.
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Caffeine Drives Acute Glucose Spikes
- Caffeine acutely raises blood glucose by increasing cortisol and epinephrine, but effects vary widely between people.
- Josh Clemente sees 0–30 mg/dL rises and recommends tuning caffeine (e.g., espresso) to personal response.
Don't Panic Over Single CGM Readings
- Treat CGM data as diagnostic information, not immediate cause for anxiety or knee-jerk action.
- Collect repeated measurements to contextualize trends before making big medical decisions.
Alcohol Can Mask Post-Meal Glucose
- Alcohol often causes a marked drop in blood glucose and blunts post-meal glucose responses despite added calories.
- The body prioritizes alcohol metabolism, likely converting substrates to triglycerides while lowering circulating glucose.