Benefits
Protects blood lipids from oxidation (EFSA-authorized claim)
Hydroxytyrosol and related olive polyphenols carry an authorized EFSA health claim for protecting LDL cholesterol from oxidative damage at 5 mg/day — a rare, regulator-backed benefit. Hydrovas 10 delivers this active.
Blood-lipid protection, not blood-pressure lowering
The authorized benefit for olive polyphenols is protecting blood lipids from oxidation, not lowering blood pressure. In the one placebo-controlled trial of a standardised olive extract in adults with raised blood pressure, systolic pressure and LDL fell about equally in the extract and placebo arms, with no significant advantage for the extract.
Potent antioxidant / anti-inflammatory action
Hydroxytyrosol is a well-characterised dietary antioxidant with documented anti-inflammatory activity in laboratory studies, supporting general antioxidant intake.
Mechanism of action
LDL oxidation protection
Hydroxytyrosol incorporates into lipoproteins and neutralizes free radicals, protecting LDL cholesterol from the oxidation that drives atherosclerosis — the basis for the EFSA claim.
Endothelial and anti-inflammatory effects
Olive polyphenols support nitric-oxide-mediated vascular function and dampen inflammatory signaling, contributing to cardiovascular benefit.
Clinical trials
Double-blind, placebo-controlled randomized trial of olive extracts on blood pressure and cardiovascular markers (PLoS One, 2026).
56 adults with elevated systolic blood pressure (a different olive extract, not Hydrovas 10).
In 56 adults with elevated systolic blood pressure, a standardised olive extract (about 25 mg/day hydroxytyrosol) taken for eight weeks did not lower blood pressure more than placebo. Systolic pressure fell about equally in both arms (extract minus 8.3 mmHg, placebo minus 7.3 mmHg, no significant between-group difference), and total cholesterol and LDL also fell similarly in both groups. The extract tested was not Hydrovas 10.
Reviews of olive polyphenols plus the EFSA opinion underpinning the authorized health claim.
Not a study in people: a review and the EFSA opinion.
Olive polyphenols (hydroxytyrosol) show strong antioxidant and anti-inflammatory activity, and the EFSA claim authorizes the LDL-protection benefit at 5 mg/day.