Kanna and cognition
What 2 graded rows on kanna agree on for cognition, and where they differ. Counted side by side, never averaged.
Consensus finder Rows from the Kanna page, reviewed Oct 21, 2026 How it decides
What the rows agree on
Each block and row is one graded row from the Kanna page, with its PubMed record.
Your question
Kanna and cognition
2 rows · 81 peopleSplit. 1 row found an improvement and 1 had mixed results.
- DGrade D× 2
- Rows
- 2
- Trials
- 2
- People
- 81
What the rows share
From the rowsThe best-graded row, grade D, is a randomized trial of 60 people (2020) and reported mixed results.
The rows run from 21 to 60 people, published from 2014 to 2020: 2 single studies.
The rows
1 improved · 1 mixed- DGrade DCognitive set flexibility and executive function · Improved
Crossover RCT · n 21 · 2014 · Cognitively healthy adults (mean age 55, Canada)
25 mg/day · 3 weeks per arm
Cognitive set flexibility (p<0.032) and executive function (p<0.022) improved versus placebo; positive changes in mood and sleep were reported. Well tolerated.
- DGrade DReaction performance, alertness and mood · Mixed
RCT · n 60 · 2020 · Recreationally trained men and women aged 20–35 (Israel)
25 mg/day · 8 days
Complex reactive performance under cognitive load improved versus placebo, but alertness, energy, total mood score and simple reaction time did not change.