Last verified: 17 days ago
Olive Extract
Also known as: olive leaf extract, olive fruit extract, Olea europaea extract, oleuropein, hydroxytyrosol, HT
Evidence under review. — Not yet rated
Plant extract rich in polyphenols. Shows modest anti-inflammatory effects; blood pressure benefits remain unproven.
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What it does
Olive extract comes from the leaves, fruit, or oil of the olive tree and is rich in polyphenols like oleuropein and hydroxytyrosol. These compounds have antioxidant and anti-inflammatory...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
250-500 mg daily based on study doses
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Found in
What the Science Says
Olive extract comes from the leaves, fruit, or oil of the olive tree and is rich in polyphenols like oleuropein and hydroxytyrosol. These compounds have antioxidant and anti-inflammatory properties that may help reduce markers of oxidative stress and inflammation. Clinical trials show some promise for improving inflammatory markers in COVID-19 patients and reducing oxidative stress in metabolic syndrome, but effects on blood pressure and cholesterol have not been significantly better than placebo in controlled trials.
What It Doesn't Do
Won't meaningfully lower your blood pressure — a clinical trial showed it performed no better than placebo. Not a proven cholesterol treatment on its own. No solid evidence it prevents heart disease. Don't expect dramatic results from the doses used in most supplements.
Evidence-Based Benefits
Olive leaf extract improved vital signs and reduced inflammation markers in hospitalized COVID-19 patients.
Weak EvidenceEffective at: 250-500 mg twice daily for 5 days
Supporting studies (click to view on PubMed):
Combined with red yeast rice, olive extract reduced key oxidative stress markers in metabolic syndrome patients.
Weak EvidenceEffective at: 9.32 mg hydroxytyrosol as part of combination supplement
Supporting studies (click to view on PubMed):
A topical olive extract serum reduced post-inflammatory dark spots and improved skin hydration after 45 days.
Weak EvidenceEffective at: 0.1% olive extract (20% hydroxytyrosol) topical formulation
Supporting studies (click to view on PubMed):
Hydroxytyrosol from olive extract, combined with pilose antler extract, improved bone mineral density in postmenopausal women.
Weak EvidenceEffective at: No established dose for olive extract alone
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Unknown — absorption of key polyphenols (oleuropein, hydroxytyrosol) occurs but varies by formulation; one study used an ex vivo method to confirm metabolites reach circulation, but no formal bioavailability studies were provided.
Red Flags to Watch For
- Blood pressure benefits are unproven — a dedicated RCT found no significant difference vs. placebo
- Most positive findings come from combination products (e.g., with red yeast rice), making it impossible to isolate olive extract's contribution
- Animal and rat studies dominate the liver and neuroprotection data — human evidence is very limited
- Widely used in over 1,000 registered supplement products despite weak clinical evidence for most marketed claims
Products Containing Olive Extract
See how Olive Extract is used in these analyzed products:
Frequently Asked Questions
What does Olive Extract do?
Plant extract rich in polyphenols. Shows modest anti-inflammatory effects; blood pressure benefits remain unproven.
What is the effective dose of Olive Extract?
250-500 mg daily based on study doses
Is Olive Extract safe?
Blood pressure benefits are unproven — a dedicated RCT found no significant difference vs. placebo
What doesn't Olive Extract do?
Won't meaningfully lower your blood pressure — a clinical trial showed it performed no better than placebo.
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: 2026-05-25