is obtained by pressing the peel of the fruits of the grapefruit tree. The essential oil is inside the chambers of the outer, spongy layer of the peel, which get opened and emptied by pressing. The yield of the extraction process is about 0.05 % and 0.6 %. The grapefruit belongs to the Cirtus type and is a crossing between orange and shaddock. The West Indies are probably the origin of the tree and it can reach a height of 15 meters.