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Oleuropein

Oleuropein

Best for

Lower blood pressure

Faint early signal 136.2–500 mg/day 8 weeks 1 meta-analysis, n=247

  • 13 papers
  • 1 of 65 outcomes
  • 1 positive

Oleuropein shows a faint early signal for lowering both blood pressure numbers, while evidence across other outcomes remains too limited for confident conclusions.

Median effective dose, most-studied outcomes

  • Lower your diastolic pressure 136.2 mg 6–8 wk
  • Lower your systolic pressure 136.2 mg 6–8 wk
Full protocol, 2 outcomes

Risk, worst reported severity

  • mild stomach upset mild
  • acne
  • ketamine moderate
  • xylazine moderate
All 14 events and interactions

What oleuropein actually does

Outcome Effect Evidence Dose Time Rank
Early research 1
Lower blood pressure Faint early signal Blood pressure is the force of blood against artery walls, and high levels strain the heart.
small 		1 meta-analysis 3 papers · n=247 136.2–500 mg 8 wk —

Effect tiers come from native-unit MCID where available, Cohen's d otherwise.

Protocol

Dose, timing & forms

How much

For blood pressure, the early clinical studies used oral olive leaf preparations supplying roughly 136 to 1,000 mg daily of oleuropein or related extract material for 6 to 8 weeks. The lowest effective amount in the reviewed trials was 136.2 mg daily, but the overall effect was small, so more is not automatically better.23 This is a daily trial protocol, not a quick fix for a high reading.

When and how long

The trials relied on steady daily use over several weeks, not occasional doses taken only when you feel stressed or see a higher reading.23 Take it at a consistent time that you can maintain. If it bothers your stomach, taking it with a meal is a practical choice, though the blood-pressure studies do not establish that food changes its effect.23

Forms & standardisation

Look for a product that clearly identifies olive leaf extract and states its oleuropein content, rather than a vague olive blend. The blood-pressure evidence comes from olive leaf preparations, so it does not automatically apply to olive oil, olive fruit powder, or a purified oleuropein product with no human trial data.23

Studied range, by outcome

Outcome Studied range Median effective Duration Evidence
Lower your diastolic pressure 136.2–1,000 mg 136.2 mg 6–8 wk 3 papers 3 sig. endpoints
Lower your systolic pressure 136.2–1,000 mg 136.2 mg 6–8 wk 3 papers 3 sig. endpoints

Adverse events and drug interactions

Safety events

mild stomach upset mild
acne
stomach ache
headache
gastrointestinal disorders
musculoskeletal and connective tissue disorders
severe headache
muscle pain

Drug interactions

ketamine moderate decreases effect
xylazine moderate decreases effect
adriamycin moderate increases toxicity
epirubicin moderate decreases effect
cyclophosphamide moderate decreases effect
propofol minor additive
Buy well

Recommended Oleuropein products

Real products that dose Oleuropein where the research does, in a clean formulation, from brands we've audited. We only list ones we'd stand behind.

Chosen for adequate Oleuropein dosing vs. the studied range, a clean formulation (grade A–C), and independent brand-quality audits. Not sponsored.

In context

What this is and how it works

  • Across 3 studies (n=247), oleuropein lowered systolic and diastolic blood pressure; noticeable-change thresholds were unavailable.2
  • The review covered 13 papers and 65 outcomes, with blood-pressure evidence concentrated in three studies.
  • Early-tier evidence limits confidence in the signal’s size and generalizability.

Oleuropein is a naturally occurring polyphenol, or plant compound, found in olives and especially olive leaves. It gives unprocessed olives much of their sharp bitterness, while commercial supplements usually provide it as part of an olive leaf extract rather than as a solo ingredient.123

Researchers are exploring whether olive leaf compounds influence the chemical signals that tell blood vessels when to loosen or tighten. Picture blood vessels as flexible garden hoses: the goal is not to force them open, but to improve the signaling that lets their walls relax when needed.23 The human trials show an early blood-pressure signal, but they do not yet establish exactly how oleuropein produces it.23

Bottom line

Oleuropein is worth watching if you are curious about olive leaf extract and want a supplement with an early, modest blood-pressure signal. Do not expect a dramatic change, and do not use it as a substitute for a blood-pressure care plan. Skip the self-experiment and speak with a clinician first if you take medicines or have persistent high readings.

Frequently asked

Common questions

What is oleuropein used for?

Oleuropein is best known as an olive-derived polyphenol. Early clinical research explores its effect on blood pressure, but the observed change is small and the evidence is not yet strong enough for a firm recommendation.23

Is oleuropein the same as olive leaf extract?

No. Oleuropein is one naturally occurring compound in olives and olive leaves, while olive leaf extract contains oleuropein plus other plant compounds. Most blood-pressure trials use an extract rather than purified oleuropein alone.123

How long does oleuropein take to work for blood pressure?

The available trials tracked blood pressure over roughly 6 to 8 weeks of daily use. It is not an occasional, same-day supplement for blood pressure.23

Can oleuropein replace blood pressure treatment?

No. The blood-pressure signal is early and small, and supplements do not replace a clinician's plan for high blood pressure. Talk with a clinician before adding it, especially if you use prescription medicines.

Sources

Sources

  1. 1. Oleuropein
  2. 2. Food supplementation with an olive leaf extract reduces blood pressure in borderline hypertensive monozygotic twins (2008) ↑
  3. 3. Olive leaf extract effectively lowers blood pressure in patients with stage-1 hypertension compared to captopril (2011) ↑

Generated August 27, 2026

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