tuneTypical Dose
~430-1600
Natural Compound
Oat Straw
Avena sativa aerial-part extract
Evidence TierCWADA NOT PROHIBITED
watchEffect Window
Acute-to-weeks depending on endpoint.
check_circleCompliance
WADA NOT PROHIBITED
Overview
Clinical Summary
Oat-straw extract may offer modest cognitive and neurovascular support, with moderate uncertainty and strong dependence on product standardization.
Oat-straw evidence is mixed rather than uniformly positive. Acute standardized-extract trials often show small task-specific attention and working-memory benefits, and one vascular trial supports improved flow-mediated dilation and cerebrovascular responsiveness. But a chronic 12-week cognition trial in healthy older adults was null. The most defensible framing is modest acute cognitive support and exploratory neurovascular benefit, not dependable chronic nootropic enhancement.
Botanical extract with probable neurovascular and attention-modulating activity, supported by small human RCTs.
Outcomes
What This Is Expected To Influence
Primary Outcomes
- Modest acute cognitive-task support
- Potential neurovascular response support
Secondary Outcomes
- Mixed short-term stress-task support in selected settings
Safety
Contraindications and Interactions
Contraindications
- Oat allergy
Side effects
- Mild GI symptoms
- Headache
Interactions
- No major established interactions
Avoid if
- Severe gluten sensitivity without certified product quality
Evidence
Study-level References
oat-straw-SRC-001Randomized double-blind placebo-controlled crossover trial.
Sourceopen_in_newWong RH, Howe PR, Bryan J, Coates AM, Buckley JD, Berry NM. Chronic effects of a wild green oat extract supplementation on cognitive performance in older adults. A randomised, double-blind, placebo-controlled, crossover trial. Nutrients. 2012;4(5):331-342. doi:10.3390/nu4050331. PMID:22690320.
Population: Healthy older adults with normal cognition.
Dose protocol: Wild green-oat extract 1,500 mg/day for 12 weeks in crossover design
Key findings: No significant cognitive benefit after chronic supplementation in healthy older adults with normal cognition.
Notes: Important negative chronic trial that limits overstatement.
Paper content
This is an important limit-setting oat-straw trial. Despite earlier acute signals, 12 weeks of daily wild green oat extract did not improve cognitive performance in healthy older adults with normal cognition. It materially weakens broad chronic-use cognition claims.
oat-straw-SRC-002Randomized placebo-controlled within-subjects trial.
Sourceopen_in_newKennedy DO, Jackson PA, Forster J, Khan J, Grothe T, Perrinjaquet-Moccetti T, Haskell-Ramsay CF. Acute effects of a wild green-oat (Avena sativa) extract on cognitive function in middle-aged adults. A double-blind, placebo-controlled, within-subjects trial. Nutr Neurosci. 2017;20(2):135-151. doi:10.1080/1028415X.2015.1101304. PMID:26618715.
Population: Healthy adults aged 40 to 65 years who reported age-related memory decline.
Dose protocol: Single 800 mg or 1,600 mg dose in repeated within-subject testing
Key findings: Acute benefits were task specific, with the 800 mg dose appearing more favorable than 1,600 mg.
Notes: Best acute cognition anchor.
Paper content
This is one of the strongest acute oat-straw trials. The benefits were task specific rather than global and the apparent optimal dose was 800 mg, not the higher 1,600 mg dose. That pattern supports modest acute attention and executive-function claims while arguing against simple more-is-better dosing.
oat-straw-SRC-003Randomized double-blind placebo-controlled trial.
Sourceopen_in_newKennedy DO, Bonnländer B, Lang SC, Pischel I, Forster J, Khan J, Jackson PA, Wightman EL. Acute and Chronic Effects of Green Oat (Avena sativa) Extract on Cognitive Function and Mood during a Laboratory Stressor in Healthy Adults. A randomised, double-blind, placebo-controlled study in healthy humans. Nutrients. 2020;12(6):1598. doi:10.3390/nu12061598. PMID:32485993.
Population: Healthy men and women aged 35 to 65 years.
Dose protocol: 430 mg, 860 mg, or 1,290 mg daily for 29 days
Key findings: Selected working-memory and multitasking benefits emerged, but mood did not improve and effects were dose specific.
Notes: Largest modern trial and still formulation specific.
Paper content
This is the largest modern oat-straw trial. It supports modest acute and 4-week benefits on selected working-memory and multitasking outcomes, but not mood, and the benefits were dose specific rather than broad. The sponsor-employed authors are important context when interpreting a positive but formulation-specific result.
oat-straw-SRC-004Randomized controlled clinical trial.
Sourceopen_in_newWong RH, Howe PR, Coates AM, Buckley JD, Berry NM. Chronic consumption of a wild green oat extract (Neuravena) improves brachial flow-mediated dilatation and cerebrovascular responsiveness in older adults. J Hypertens. 2013;31(1):192-200. doi:10.1097/HJH.0b013e32835b04d4. PMID:23221935.
Population: Healthy older adults over 60 years of age.
Dose protocol: Wild green-oat extract 1,500 mg/day for 12 weeks
Key findings: Improved brachial flow-mediated dilation and cerebrovascular responsiveness without changing resting blood pressure.
Notes: Best neurovascular anchor.
Paper content
This trial supports the most distinctive oat-straw mechanism claim: improved systemic and cerebral vasodilator responsiveness in older adults. It strengthens neurovascular plausibility, but it is still one formulation-specific trial and does not prove durable cognitive benefit on its own.
oat-straw-SRC-005Systematic review of RCTs.
Sourceopen_in_newJibril AT, Arero AG, Kankam SB, Fuseini M. Effect of Avena sativa (Oats) on cognitive function. A systematic review of randomized controlled trials. Clin Nutr ESPEN. 2023;53:144-150. doi:10.1016/j.clnesp.2022.12.011. PMID:36657906.
Population: Healthy adults across randomized trials of Avena sativa extracts.
Dose protocol: Systematic review of six randomized trials
Key findings: Acute cognitive effects appeared more favorable than long-term chronic effects across the small trial base.
Notes: Best high-level review for calibration.
Paper content
This systematic review captures the real oat-straw evidence balance well: acute effects look more convincing than long-term chronic use, the trial base is small, and dose heterogeneity limits certainty. It supports modest, formulation-specific cognition framing rather than confident nootropic claims.
oat-straw-SRC-006Human physiological response study.
Sourceopen_in_newDimpfel W, et al. Ingested oat herb extract changes EEG spectral frequencies in healthy subjects. J Altern Complement Med. 2011. PMID:21563962.
Key findings: Neurophysiologic signal consistent with CNS effects.
Paper content
Neurophysiologic signal consistent with CNS effects.
oat-straw-SRC-007Acute randomized trial.
Sourceopen_in_newBerry NM, et al. Acute effects of an Avena sativa herb extract on responses to the Stroop Color-Word test. J Altern Complement Med. 2011. PMID:21711204.
Key findings: Improvement in selected executive-task measures.
Paper content
Improvement in selected executive-task measures.