Green Oat Extract
Also known as: Wild Green Oat Extract, WGOE, Avena sativa extract, Neuravena, Green Oats
Effective Dosage
900-1500 mg daily based on study doses
What the Science Says
Green oat extract is a concentrated herbal extract from the unripe Avena sativa plant, distinct from oatmeal or oat fiber. Clinical trials show it can meaningfully improve blood vessel flexibility in both the heart and brain after 12 weeks of daily use at 1500 mg. It has also shown promise for reducing perceived stress and improving sleep quality in people trying to cut back on smoking, though it did not produce lasting cognitive improvements in healthy older adults in one 12-week trial.
What It Doesn't Do
Won't reliably sharpen your memory or focus with long-term use — one well-designed trial found zero cognitive benefit after 12 weeks. Not a proven smoking cessation drug. Won't lower your blood pressure. Rat studies showing mood benefits don't automatically translate to humans.
Evidence-Based Benefits
Green oat extract is a concentrated herbal extract from the unripe Avena sativa plant, distinct from oatmeal or oat fiber. Clinical trials show it can meaningfully improve blood vessel flexibility in both the heart and brain after 12 weeks of daily use at 1500 mg. It has also shown promise for reducing perceived stress and improving sleep quality in people trying to cut back on smoking, though it did not produce lasting cognitive improvements in healthy older adults in one 12-week trial.
Moderate EvidenceEffective at: 900-1500 mg daily based on study doses
Source: auto-research
Absorption & Bioavailability
Unknown — no pharmacokinetic studies were provided. Studies used encapsulated oral doses taken daily, suggesting reasonable oral delivery, but absorption data is not available from the provided research.
Red Flags to Watch For
- Most research uses a single proprietary extract (Neuravena) — results may not apply to other green oat products on the market
- Cognitive benefits seen acutely in some studies did NOT persist with chronic supplementation in healthy older adults
- Only 5 clinical trials exist in the literature; long-term safety data beyond 24 weeks is not established
- Over 1,000 supplement products registered in NIH DSLD use this ingredient, but most are not backed by the specific doses or extract forms studied
- Animal (rat) behavior data should not be used to justify human cognitive or mood claims
Products Containing Green Oat Extract
See how Green Oat Extract is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-09