The study I posted above showed a reduction in blood pressure with nattokinase supplementation. This case report suggests that orally administered nattokinase is an effective fibrinolytic, with all of the danger that implies:
Intern Med. 2008;47(5):467-9. Epub 2008 Mar 3.
Cerebellar hemorrhage provoked by combined use of nattokinase and aspirin in a patient with cerebral microbleeds.
Chang YY, Liu JS, Lai SL, Wu HS, Lan MY.
Department of Neurology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan.
Nattokinase is used as a health-promoting medicine for preventing thrombosis due to its fibrinolytic activity. Cerebral microbleed is remnant of blood extravasations from the damaged vessels related to cerebral microangiopathies. We report a patient, having used aspirin for secondary stroke prevention, who had an acute cerebellar hemorrhage after taking nattokinase 400 mg daily for 7 consecutive days. In addition to the hemorrhagic lesion, multiple microbleeds were demonstrated on brain MR images. We suggest that nattokinase may increase risk of intracerebral hemorrhage in patients who have bleeding-prone cerebral microangiopathy and are receiving other antithrombotic agent at the same time.
PMID: 18310985
Clearly this was a high risk patient, who combined the highest recommended dose of nattokinase (8000 FU) with aspirin therapy. This is also the only published report of such an occurrence that I can find. Taken together with the ubiquitous presence of nattokinase in the Japanese diet, I interpret this to mean that nattokinase does have real fibrinolytic activity, but is not normally dangerous at sensible doses in low-risk individuals who are not on concurrent antithrombotic medication.
lufega: I haven't decided how I will use these enzymes yet. Nattokinase seems to have more evidence of fibrinolytic activity so I am interested in incorporating that somehow (I keep seeing notes from the lab technicians on my blood test results about fibrin strands being present). Right now I'm taking doctor's best serrapeptase 40,000u 2-3x daily on an empty stomach with tetracycline.
I'm also looking into bromelain because it has been noted to synergize with antibiotics as well and might replace the function of one of these two expensive bacteria-derived enzymes for less money. I might even take all three.
Edited by FunkOdyssey, 05 March 2009 - 04:47 AM.