This document discusses the health benefits of nattokinase, an enzyme produced during the fermentation of soybeans to make natto. It notes that nattokinase helps break down fibrin and prevents the formation of blood clots, making it a natural blood thinner. It also claims nattokinase can help lower high blood pressure and cholesterol levels. The document recommends taking 100-200mg of nattokinase supplement per day to experience these potential health benefits.