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Blog Heart & Circulation

High blood pressure: a clinical study evaluates olive leaf extract

21/10/2026

Traditionally associated with cardiovascular health, the olive leaf is the subject of clinical research. A new study involving 621 patients with high blood pressure assesses the effects of olive leaf extract on blood pressure.

📌︎ Key takeaways
  • ✓A randomised, placebo-controlled trial assessed olive leaf extract in 621 patients already being treated for high blood pressure, over a 12-week period.
  • ✓Blood pressure was measured over a 24-hour period, both during the day and at night.
  • ✓Mean systolic blood pressure fell by 6.4 mmHg with the extract, compared with 1.5 mmHg with the placebo.
  • ✓These results add to our understanding, but need to be confirmed.
  • ✓A supplement is not a substitute for antihypertensive treatment. Seek advice before taking any supplements and never alter your treatment without medical advice.

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