Cognitive Performance
Research-led coverage of focus, memory, and the tools that genuinely support thinking work.
All guides in this category
The Evidence Behind Focus Supplements, Read Carefully
We went through the trials behind the most marketed nootropic ingredients. Some hold up modestly....
Note Taking Systems and the Illusion of Structure
Elaborate systems feel productive because organising is easier than thinking. Here is what the research...
Blue Light Glasses Reviewed Against the Studies
The category is built on a claim the evidence does not clearly support. We explain...
Building an Attention Routine That Survives a Bad Week
Most focus advice assumes ideal conditions. This is a routine designed for the weeks when...
Buying guides
Longer pieces that walk through a decision from first principles.
Reviews
Individual products after they have been through our full testing period.
Nothing published in this format yet. New work appears here as it is tested.
Comparisons
Side by side, with the trade offs stated plainly.
Daniel Reyes
A claim without a mechanism is a story, not a finding.
Daniel trained in cognitive psychology and spent six years in research before deciding that most people needed translation more than they needed another paper. He reads the studies behind the claims and reports what the evidence actually supports, including when the honest answer is that nobody knows yet.
View profileQuestions we get about this category
Each guide is reviewed when a significant product arrives or when further testing changes our view. The revision date appears at the top of every article.
Yes. If a product has not been through our own testing, we say so plainly in the article rather than implying otherwise.
One specialist owns each category and writes everything published in it, so the perspective stays consistent over time.
One email every five days
A short letter with what we published, what we are still testing, and the occasional thing we got wrong. No urgency, no filler.