Hydroxytyrosol 18 actually has a patent on the extraction process – which allows us to preserve 18 active components within the olive leaf, more than other products. Furthermore, East Park Research has completed clinical studies that proves Hydroxytyrosol 18 has anti-microbial and anti-bacterial activities. Our products is not standardized, and it contains a minimum of 18% hydroxytyrosol and 18% oleuropein.