Olive leaf extract and a method of manufacturing the same

The present invention provides a method for producing olive leaf extract containing a high concentration of oleuropein. Method for producing olive leaf extract The invention includes a first step of pulverizing the dried olive leaves, and a second step of extracting olive leaf extract using an extraction solvent from olive leaves was ground, in a second step, the extraction solvent is water, an alcohol, or a combination thereof, and is intended to extract at 70 ° C. or higher. .BACKGROUND