Natto is a traditional Japanese food of fermented soybeans that has been eaten for many centuries. It is believed to be a health-giving delicacy & has an "acquired" taste & smell. New scientific research has discovered why natto is so good for health the Bacillus subtilis natto (the good bacteria that form during the fermentation process) produce functional proteins (including nattokinase) which naturally & safely help the body to maintain optimum blood viscosity. Natto is, therefore, an important food for those wishing to help reduce the risk of thrombosis (blood clots) a central factor in heart disease & strokes, two of the biggest killers in Western society today, & Deep Vein Thrombosis (DVT), a concern for those taking long haul airplane journeys. This is of particular interest for those wanting a safe, non-drug, Aspirin alternative for healthy blood flow.