Helps Maintain Normal Blood Pressure and Circulation. The incredible new breakthrough for circulation and blood pressure already in the normal range. Helps maintain normal blood pressure levels already within the normal range. Supports normal blood flow to the brain and throughout the body. Natto Hear is the finest quality most potent Nattokinase you can buy for maintaining normal blood pressure circulation and plasmin levels. . NattoHeart contains the new discovery Nattokinase an enzyme extracted from fermented soy that actually facilitates normal circulation and blood flow in the same way that plasmin does. Discovered by a Japanese medical research scientist Nattokinase has shown an extraordinary ability in extensive clinical testing to promote normal blood pressure levels and circulation. Not only that Nattokinase also has been shown to promote your body's own natural production of plasmin.