Supports Blood Pressure already within the healthy range. Hawthorn leaves, flowers and berries have been used for generations by herbalists as a cardiovascular tonic. Hawthorn promotes cardiovascular health by supporting cardiac muscle tone and vascular integrity. Hawthorn Extract also exhibits powerful free radical scavenging activity. NOW Hawthorn Extract is standardized to 1.8% Vitexin that, along with other natural components, has been found to support normal blood flow and may help to maintain healthy blood pressure already within the healthy range.