The heart monitor i wore revealed i have what dr says some 5-10% of 80y-olds have (am 79 june 1), atrial fibrillation (AFib). He, the neurologist, said risk/benefit consideration suggest a blood thinner stronger than the one a day Cartia would be wise so put me on Eliquis .. https://scopeblog.stanford.edu/2018/10/11/understanding-afib-blood-thinners-simplified/ . And recommended seeing a cardiologist, in case. Will see the gp next week and ask him about your Nattokinase .. https://investorshub.advfn.com/boards/read_msg.aspx?message_id=162117268 .