Olive Leaf Extract and Oleuropein: What the Numbers on the Label Mean

By the Zespo team · Updated 26 October 2026

The olive tree (Olea europaea) gives us olives and olive oil, but its leaves have also been brewed as tea around the Mediterranean for centuries. Today they are dried and extracted for supplements.

What is oleuropein?

Oleuropein is a natural compound that gives olive leaves and unripe olives their bitter taste. When olives are cured or processed, part of it breaks down into hydroxytyrosol.

What does "standardised to 20% oleuropein" mean?

A standardised extract guarantees a minimum amount of a marker compound. 500 mg of an extract standardised to 20% oleuropein contains about 100 mg of oleuropein. A plain leaf powder has no guaranteed figure, so the two are not directly comparable.

What to check before you buy

• The amount of each ingredient per serving, not just per capsule
• How many capsules make one serving and how many servings are in the pack
• Whether any ingredient sits inside an undisclosed "proprietary blend"
• An FSSAI licence number and the veg/non-veg mark on the pack

Label facts: Zespo Olive Leaf and Fruit Extract Complex 1,360 mg - 60 Capsules

• A three-ingredient olive complex providing 1,360 mg per two-capsule serving from Olive Leaf Extract, Olive Fruit Extract and Hydroxytyrosol
• Contains 60 capsules providing a 30-day supply
• Made in India in a GMP-certified facility, FSSAI-licensed

See Zespo Olive Leaf and Fruit Extract Complex 1,360 mg - 60 Capsules on zespo.in · Also on Amazon.in (search "Zespo").

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Zespo products are food supplements, not medicines. This article is for general information and is not medical advice. Take supplements as directed on the label and speak to a qualified healthcare professional if you are pregnant, nursing, taking medication or have a medical condition.