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Olive Leaf

traditional health uses

Evidence · Grade B
Meta-analysis availableHuman trial evidenceTraditional useInteraction risk

Olive leaf, derived from the olive tree, contains oleuropein and has been traditionally used for health, though scientific evidence for its efficacy is still emerging.

Olive leaf extract, derived from the leaves of the olive tree (Olea europaea), has been traditionally used for its health benefits. It is rich in polyphenols, particularly oleuropein, which is thought to contribute to its medicinal properties, including effects on blood pressure.

Quick answer

What it is: Olive leaf extract, derived from the leaves of the olive tree (Olea europaea), has been traditionally used for its health benefits.

May support:Hypertension, High Blood Pressure

Evidence:Evidence · Grade B

Evidence Summary

Evidence · Grade B

Given the absence of specific PubMed studies provided, any claims regarding the efficacy of olive leaf for hypertension or other conditions are currently unsupported by direct scientific evidence in this context. Therefore, the evidence grade for specific health benefits remains low or unestablished.

Last reviewed · Jun 2026

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Why It Works

Oleuropein and other polyphenols in olive leaf are believed to act as vasodilators, improving blood flow by relaxing the smooth muscle in blood vessel walls. They may also exhibit ACE-inhibitory effects, similar to some pharmaceutical blood pressure medications, which reduces the production of angiotensin II, a potent vasoconstrictor.

How to use

Always consult a qualified clinician.

Editorial guidance

Suggested dosage
Standardized extracts are often dosed at 500-1000 mg daily, containing 15-20% oleuropein, divided into 1-2 doses.
Typical forms
capsule, tincture, tea, extract
Quality markers
Look for products standardized to a certain percentage of oleuropein, typically 15-20%. Reputable brands will provide third-party testing for purity and potency.
Medication interactions
  • Antihypertensive drugs
  • Anticoagulants
  • Antidiabetic drugs
Avoid if
  • Pregnant
  • Breastfeeding
  • Allergy to olives

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Suggested dosage

Standardized extracts are often dosed at 500-1000 mg daily, containing 15-20% oleuropein, divided into 1-2 doses.

General guidance — discuss specifics with a clinician.

Active medicinal compounds

Oleuropein, hydroxytyrosol, verbascoside, ligstroside.

Traditional use

Historically, olive leaf has been used in Mediterranean and Middle Eastern folk medicine. It was traditionally employed for its perceived health-promoting properties, including supporting general well-being and addressing various ailments. Its use dates back centuries, with ancient Egyptians and other cultures utilizing the olive tree for both its fruit and leaves.

Safety

Safety warnings

Olive leaf extract is generally considered safe for most adults when taken orally for short periods. Some individuals may experience mild gastrointestinal upset.

Avoid if

  • Pregnant
  • Breastfeeding
  • Allergy to olives

Medication interactions

  • Antihypertensive drugs
  • Anticoagulants
  • Antidiabetic drugs

Reported side effects

  • Stomach upset
  • Headache
  • Dizziness

General guidance — discuss specifics with a clinician.

Evidence ecosystem

Scientific literature, clinical guidance, government sources, ongoing research, traditional use, and lived experience — grouped by source type and quality.

Overall grade (B)

Given the absence of specific PubMed studies provided, any claims regarding the efficacy of olive leaf for hypertension or other conditions are currently unsupported by direct scientific evidence in this context. Therefore, the evidence grade for specific health benefits remains low or unestablished.

Meta-Analyses(1)

Pooled analyses across multiple human trials.

Very High Quality

  • What is the efficacy of dietary, nutraceutical, and probiotic interventions for the management of gastroesophageal reflux disease symptoms? A systematic literature review and meta-analysis.

    Martin Z, Spry G, Hoult J, Maimone IR, Tang X, Crichton M · Clinical nutrition ESPEN · 2022

    Treatments for Gastroesophageal Reflux Disease (GERD) symptoms include pharmaceutical, surgical, dietary, and lifestyle behaviors; however, dietary interventions lack evidence synthesis. What is the effect of dietary, probiotic, and nutraceutical interventions on GERD symptoms, with or without pharmaceutical therapy, in adults with a history of GERD or functional dyspepsia compared to no intervention, placebo, or usual care? A systematic review and meta-analysis was performed according to PRISMA. The search strategy was implemented in MEDLINE, CINAHL, CENTRAL, and Embase on the 28th October 2020 and updated to 27th July 2021. Intervention studies were eligible if they evaluated the effect of a dietary, nutraceutical, or probiotic intervention on GERD symptoms in adults with a history of GERD or functional dyspepsia. The internal validity of studies was assessed using the Academy Quality Criteria Checklist; Review Manager software was used to perform meta-analysis; and certainty in th

    Meta-AnalysisPubMedVery High Quality

Limitations: A significant limitation is the lack of specific PubMed studies provided for review, which prevents an assessment of study design, sample size, and clinical relevance. Without this information, it is not possible to determine the strength or weakness of any existing research on olive leaf.

This page is educational. Statements use phrases like "may support" and "has been studied for"because no remedy here is approved to cure, treat, or reverse any condition. Discussion happens on the ailment pages — community statistics here are derived from those reports. Always consult a qualified clinician.

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