Olive leaf extract and heart

What 2 graded rows on olive leaf extract agree on for heart, and where they differ. Counted side by side, never averaged.

Consensus finder Rows from the Olive leaf extract page, reviewed Oct 21, 2026 How it decides

What the rows agree on

Each block and row is one graded row from the Olive leaf extract page, with its PubMed record.

Supplement

Olive leaf extract Choose another

2 rows · 681 people

Split. 1 row found an improvement and 1 had mixed results.

Mixed

Improved

Each block is one evidence row, sized by how many people it enrolled, with its grade inside. Outlined: mixed results.

From the rows

The best-graded row, grade C, is a randomized trial of 621 people (2025) and reported mixed results.

The rows run from 60 to 621 people, published from 2017 to 2025: 2 single studies.

1 improved · 1 mixed

Grade DBlood pressure in men with prehypertension · Improved
Crossover RCT · n 60 · 2017 · Men with prehypertension (systolic 121–140 mmHg)
136 mg oleuropein + 6 mg hydroxytyrosol a day · 6 weeks per arm
24-hour systolic pressure was 3.3 mmHg and diastolic 2.4 mmHg lower than with the control drink; total and LDL cholesterol also fell.
Row on the Olive leaf extract page · PubMed 26951205 (opens PubMed)
Grade C24-hour blood pressure in people on blood pressure medicine · Mixed
RCT · n 621 · 2025 · Adults on treatment for hypertension
Not stated in the abstract · 12 weeks
24-hour systolic pressure fell 6.4 mmHg from baseline; the difference from placebo was 1.5 mmHg (95% CI −3.9 to 0.51), so the between-group effect was small and not clearly different from zero.
Row on the Olive leaf extract page · PubMed 40990594 (opens PubMed)