A masterful, rigorous, scientific debunking of everything we've ever been told about (de)hydration.

My key takeaways:
- Heat-induced illness (heatstroke) has almost nothing to do with how hydrated you are.
- Hydration does nothing for athletic performance, and drinking too much can and does kill people regularly (EAH/EAHE), especially slow walk/jog marathon runners.
- Overdrinking before or during an endurance event causes weight gain that negatively affects performance.
- Being misdiagnosed and treated as if you are dehydrated when you are in fact overhydrated will in many cases lead to an agonizing and painful death due to brain swelling.
- Glucose consumption during activity does provide a measured performance boost; there is no evidence that sodium (or any other electrolyte) consumption has any similar performance effect. All Gatorade-sponsored studies that show similar results conflate the results of glucose with those provided by the "electrolytes" and "hydration" aspects of the sports drink products.
- Gatorade and Gatorade Sports Science Institute (GSSI) have blood on their hands, the sports drink market is largely useless, and corrupt shill scientists still push dangerous misinformation.
- The sensation of "thirst" is a biological comfort indicator and is not a medical symptom of dehydration.
- The guideline for maximum safe fluid consumption during an endurance event is a rough approximation of how much you actually sweat.