Signal, written down.
Evidence-graded writing on nootropics and cognitive performance — what the trials actually show, where the hype outruns the data, and how to read a claim before you buy it.
9 articles · by KÖGN Editorial
LatestFoundationsOctober 20265 min read
Beating the 3pm slump without another coffee: what actually works
The afternoon dip is predictable — and the second coffee that papers over it often costs you that night's sleep. What the evidence supports instead: smaller, earlier caffeine, the caffeine–theanine pairing, and the upstream fixes that matter more than any supplement.
Read the article →- FoundationsOctober 20266 min readAre nootropics safe? Side effects, interactions, and who should be cautiousMost well-studied nootropics are low-risk at sensible doses — but low-risk isn't no-risk. An honest look at side effects, drug interactions, the people who should be careful, and why a hidden dose is a safety problem, not just a marketing one.
- EvidenceOctober 20266 min readThe best nootropics for focus: what the evidence actually supportsA short, evidence-graded list of the nootropics with real human data for focus — caffeine, L-theanine and citicoline lead — plus why 'best' depends on the kind of focus you need, and which popular picks the evidence doesn't back.
- EvidenceJune 20265 min readCreatine softened the cognitive cost of sleep loss in a 2026 trialA small 2026 trial found a single 0.2 g/kg dose of creatine blunted the cognitive losses of sleep deprivation by up to 12%. The effect is most reliable exactly when you're depleted — and a review notes the gains skew larger in women, who tend to start with lower stores.
- EvidenceJune 20265 min readAn L-theanine blend matched caffeine on attention — without the blood-pressure riseA 2026 randomised controlled trial found an L-theanine-based multi-ingredient blend improved selective attention and executive function comparably to 150 mg of caffeine — but without caffeine's rise in blood pressure. A clean case for stimulant-free focus, with the usual early-trial caveats.
- EvidenceJune 20266 min readCreatine and the brain: the energy case gets strongerNew 2026 brain-imaging trials show 5 g/day of creatine raises the brain's own energy reserve and may slow early Alzheimer's decline. The signal is real and worth watching — but still early, and not a treatment claim.
- FoundationsMay 20265 min readHow long until nootropics work? Acute vs. chronic effectsSome nootropics work within the hour; others take weeks. Knowing which clock an ingredient runs on tells you when to expect anything — and stops you judging the slow ones too early.
- StacksMay 20265 min readCaffeine and L-theanine: the evidence behind the classic stackWhy pairing L-theanine with caffeine is the most reliable beginner nootropic stack — what the human trials show, the ratio people use, and how to take it without leaning on tolerance.
- EvidenceApril 20266 min readDo nootropics actually work? What the evidence showsAn honest, evidence-graded answer: which nootropics have repeated human trials behind them, how large the effects really are, and where the marketing outruns the data.
About the Journal
- What is the KÖGN Journal?
- The KÖGN Journal is KÖGN Health's editorial blog: calm, evidence-literate writing on nootropics and cognitive performance. Every article is written by KÖGN Editorial and leans on the same A+ to C evidence grades used across the rest of the site, so claims stay tied to the published research. How KÖGN grades evidence →
- Is the Journal medical advice?
- No. The Journal is educational writing about cognitive performance and nootropic ingredients, not medical advice. Speak to a qualified clinician before changing what you take, especially if you are pregnant, taking medication, or managing a health condition.