Allergy Research Nattokinase 50 mgNattokinase 50mg by Allergy Research Group is a dietary supplement that contains natural ingredients for healthy blood circulation. Natto is a traditional Japanese food made from fermented soybeans that are believed to help your body combat cardiovascular diseases for decades. It contains an enzyme known as nattokinase that provides this benefit. This enzyme is four times more effective in disintegrating blood clots than naturally occurring plasmin,