This herbal extract has been used extensively in Europe for preventing and treating varicose veins and other vein disorders. This herbal extract has been safely used in controlled clinical trials involving over 700 patients and is approved by the German Commission E for the treatment of chronic venous insufficiency and feelings of heaviness in the legs. This herbal extract tones and strengthens blood vessels and inhibits the action of enzymes that can damage capillary walls. This herbal extract is standardized to contain the active ingredient aescin (also called escin), which has been shown to provide strong anti-inflammatory and antioxidant properties, as well as the ability to increase venous tone. What is this herbal extract?