No detectable effect of a widely marketed nootropic stack on working memory across 214 healthy adults: a pre-registered null
We tested the eight-ingredient formulation most frequently discussed in self-experimentation forums against placebo in a pre-registered, double-blind crossover (n = 214, twelve-week washout). Across n-back accuracy, reaction time, and a delayed-recall composite, we observed no effect distinguishable from zero at any dose (all 95% confidence intervals spanning the null. Largest standardized effect d = 0.04). Subjective alertness rose in both arms identically. We report the full negative in the interest of the several thousand people currently buying this compound monthly. The pre-registration predicted a moderate effect. It was wrong, and we are the only people who will tell you so.