Oleuropein
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A bitter polyphenol compound found in olive leaves and olive fruit, particularly abundant in unripe olives and olive leaf extract.
Why it’s used
Taken as an antioxidant compound, often marketed for cardiovascular or general antioxidant support as part of olive-derived extracts.
What the evidence is for
protecting LDL cholesterol from oxidative damage, as part of olive polyphenol mixtures.
What the evidence says
Laboratory and some human studies suggest olive polyphenols, including oleuropein, may help protect LDL cholesterol from oxidative damage, a basis the European Food Safety Authority has recognized for olive oil polyphenols generally. Evidence specific to isolated oleuropein, rather than whole olive polyphenol mixtures, in humans remains limited.
Context
Much of the supporting research involves olive oil or leaf extracts containing a mix of polyphenols rather than oleuropein given alone, making it hard to attribute effects to oleuropein specifically.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.