Polygonum Cuspidtum, also known as Japanese Knotweed, is native to Eastern Japan, China, and Korea. It is known as a rich source of the antioxidant Resveratrol. It also contains emodin which has the ability to regulate bowel motility. The extract of this plant can be used as a natural laxative. Japanese Knotweed extracts are concentrated to maximize the Resveratrol and contain very little emodin. Resveratrol has the potential to support healthy blood vessel function and promote cardiovascular health.