Olive Leaf Extract
herbs
Olive leaf extract is derived from the leaves of the olive tree and contains polyphenols, particularly oleuropein, which is responsible for many of its bioactive properties. Traditionally used in Mediterranean folk medicine, it is commonly used to support immune function and cardiovascular health.
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Benefits
Dosage
Typical Dose
250-500 mg daily of standardised extract (15-20% oleuropein)
Upper Limit
1000 mg daily
Timing
With meals to enhance absorption and minimise gastrointestinal upset
Forms & Bioavailability
Standardised Extract (15-20% oleuropein)
High
Dried Leaf Powder
Moderate
Liquid Tincture
High
Side Effects
Interactions
Research Summary
Evidence for olive leaf extract is moderate. Multiple studies support benefits for cardiovascular health and blood pressure management, with several clinical trials demonstrating modest reductions in systolic and diastolic blood pressure. Antioxidant and antimicrobial properties are well-established in vitro. However, human clinical trials are limited in scope and sample size, and further research is needed to establish optimal dosing and long-term efficacy for specific health claims. Most evidence is derived from in vitro and animal studies rather than large-scale randomised controlled trials.
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The Bottom Line on Olive Leaf Extract
Olive Leaf Extract is moderately researched with promising but sometimes mixed evidence.It is most commonly used for supports immune system function through antimicrobial and antiviral properties and promotes cardiovascular health by helping to maintain healthy blood pressure and cholesterol levels. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.
About Our Research
This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.
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Goal Guides for Olive Leaf Extract
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