Adequate hydration is the fundamental, and often overlooked, lever for optimizing cognitive performance, long before turning to expensive supplements.

noli's read

The scientific community strongly converges on the idea that physiological foundations (water, sleep, nutrition, exercise) take precedence over any supplementation. Scientific research, including meta-analyses published in journals such as 'Nutrients', confirms that mild dehydration can effectively impair concentration, working memory, and mood. However, the claim that increased hydration instantly 'unlocks' superior cognitive abilities is often exaggerated; the observed effect is primarily the return to normal functioning in a previously dehydrated individual. There is no robust evidence suggesting that water consumption exceeding actual physiological needs provides a surplus of mental clarity. The concept of 'specific need' also varies enormously depending on lifestyle, which makes the advice to drink a fixed amount sometimes imprecise. In short, hydration is a necessary, but not sufficient condition to 'boost' the brain beyond its baseline.

the sources

1. 1Valtin H 2002
2. 2r/Nootropics