The Physiological Case Against Routine Supplementation
On January 15, 2026, Smith published a detailed argument—developed in collaboration with nutrition expert Adam McDonald—that electrolyte supplements are unnecessary for the vast majority of people. At the core of their analysis is a physiological point that challenges the foundational premise of most electrolyte marketing: sweat is hypotonic, meaning it is less concentrated than blood. As a result, blood sodium concentration tends to rise during sweating rather than fall, directly undermining the narrative that exercise automatically depletes electrolytes in ways requiring supplementation.
Sodium Intake and the Research Gap
Smith grounds his critique in basic nutritional data. Table salt is composed of 40% sodium and 60% chloride, and the average American already consumes approximately 3.3 grams of sodium per day—a figure that exceeds the recommended daily limit of 2.3 grams. Against this backdrop, additional sodium from specialty supplements is redundant for most people. Reviewing the performance research, Smith and McDonald found no direct improvements—in metrics such as time to exhaustion, race times, or time-trial outcomes—attributable to sodium supplementation.
Product Testing: The Trainade Finding
Smith's product testing during this period produced a particularly revealing result. Trainade, a sports drink by the Fight Dietician that he had been using, tested at approximately 80% glucose. This composition indicated that any performance benefits he had perceived from the drink were far more likely the result of carbohydrate intake than electrolyte content—a distinction with significant implications for how athletes interpret their subjective experiences with such products.
Practical Alternatives and Honest Caveats
Smith does acknowledge one research-supported application for sodium: it can increase voluntary fluid intake in individuals who struggle to drink adequate amounts of water. For training sessions lasting under four hours or conducted at normal sweat rates, he characterizes most electrolyte products as little more than flavored salt. As a cost-effective alternative, he recommends combining ordinary table salt with cordial, squash, or fruit juice to achieve comparable functional results at a fraction of the price.
While stressing that severe electrolyte disturbances—including hyponatremia—are genuinely serious medical conditions, Smith argues that supplement companies routinely extrapolate findings from specific clinical contexts into sweeping claims about hydration, cramping, fatigue, brain health, and appetite control. He frames his critique as an open, evidence-based dialogue and explicitly invites scientific rebuttal.