Green Oat Extract (Oat Herb) and cognition

What 2 graded rows on green oat extract (oat herb) agree on for cognition, and where they differ. Counted side by side, never averaged.

Consensus finder Rows from the Green Oat Extract (Oat Herb) page, reviewed Oct 21, 2026 How it decides

What the rows agree on

Each block and row is one graded row from the Green Oat Extract (Oat Herb) page, with its PubMed record.

Supplement

Green Oat Extract (Oat Herb) Choose another

2 rows · 324 people

Split. 1 row found no difference and 1 had mixed results.

No difference or mixed

Improved

Each block is one evidence row, sized by how many people it enrolled, with its grade inside. Outlined: mixed results.

From the rows

The best-graded row, grade C, is a systematic review of 287 people (2023) and reported mixed results.

The rows run from 37 to 287 people, published from 2012 to 2023: 1 pooled review and 1 single study.

1 no difference · 1 mixed

Grade CCognition after 12 weeks in older adults · No difference
Crossover RCT · n 37 · 2012 · Healthy Australian adults averaging 67 years with normal cognition
1,500 mg/day · 12 weeks per period
Daily supplementation did not affect any measure of cognition, tested at least 18 hours after the last dose.
Row on the Green Oat Extract (Oat Herb) page · PubMed 22690320 (opens PubMed)
Grade CCognitive accuracy and speed (systematic review of RCTs) · Mixed
Systematic review · n 287 · 2023 · Healthy adults in 6 randomized trials (3 crossover)
Varied between trials · Single dose to 12 weeks
Single doses appeared to improve accuracy and speed of performance. Short-term daily use improved cognitive function; longer-term daily use did not. Evidence was rated of average quality.
Row on the Green Oat Extract (Oat Herb) page · PubMed 36657906 (opens PubMed)