Olive leaf is an herb that comes from the same Mediterranean tree from which olive oil is produced. Like the oil, the leaf contains antioxidant compounds. Of particular interest is a chemical called oleuropein, which is the same antioxidant polyphenol responsible for the tangy, slightly bitter taste of good quality olive oil. The whole herb is tinctured or used to make tea, usually in combination with other herbs to enhance flavor. Powdered olive leaf is encapsulated as a dietary supplement, used as an ingredient in cosmetics and other topical preparations, or is used as a seasoning and food additive.
Olive leaf comes from the same Mediterranean tree as olive oil. Just like the oil expressed from the fruit of this tree, the leaf is rich in nutrients, including a potent antioxidant called oleuropein. Because the structure of the whole leaf is left intact, its chemical composition is less processed and therefore uncompromised.
Whole olive leaf is typically used to prepare teas, infusions and liquid extracts.