In a trial involving sets of twins, a study published in Phytotherapy Research suggests that a 1000mg of a specific olive leaf extract (EFLA®943, Trademark: Benolea) can lower cholesterol and lower blood pressure in patients with mild hypertension (high blood pressure).

To test this in humans, researchers from Switzerland and Germany conducted a pilot trial with 20 identical (monozygotic) twin pairs who had an increased blood pressure. Individuals were either given placebo capsules or capsules containing doses of 500mg or 1000mg of olive leaf extract EFLA®943. Pairs of twins were assigned to different treatments. After the subjects had taken the extract for eight weeks researchers measured blood pressures as well as collecting data about aspects of life-style.

The study used Frutarom's EFLA943 olive leaf extract, and the company also funded the study.

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