Olive Leaf Extract
Commonly used for
Heart Health
Where to Buy
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The cheapest product is usually low quality, but more expensive doesn’t always mean better.
What is it? / Overview
Olive leaf extract contains oleuropein and hydroxytyrosol, compounds that improve endothelial function and may modestly reduce blood pressure and LDL cholesterol. Benefits appear greatest in people with mild hypertension or metabolic syndrome.
How is it used? / Administration
Form: Standardized extract, 15–25% oleuropein
Typical dose studied: 500–1,000 mg/day (~100–200 mg oleuropein)
Timing: With meals
Standardized oleuropein content matters more than total extract weight. May have additive blood pressure-lowering effects with medication.
How well does it work? / Evidence
~ Moderate evidence
Who should avoid it?
Avoid with: Hypotension / Low blood pressure
Interacts with: Antihypertensive medications; Diabetes medications
Already taking it? Monitor blood pressure after initiation.
Research & references
Lockyer S et al. (2017). Olive leaf extract and blood pressure RCT. European Journal of Nutrition. de Bock M et al. (2013). Olive leaf polyphenols and insulin sensitivity RCT. PLoS ONE. Angelopoulos N et al. (2023). CoQ10, grape seed, and olive leaf extracts RCT. Nutrients.
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