Nattokinase is a fibrinolytic enzyme from natto (fermented soybeans) that directly dissolves fibrin — the protein mesh of blood clots. Our research shows it has genuine anticoagulant activity: a single dose reduces fibrinogen by 7-10% within 8 hours, and chronic supplementation (2,000 FU/day) significantly reduces blood clot risk markers. This is NOT a mild supplement — it's a potent blood thinner with real clinical effects that make it dangerous to combine with ANY anticoagulant medication, including aspirin.
Nattokinase is a serine protease that works through four parallel anticoagulant mechanisms: (1) directly cleaves and dissolves fibrin — the structural protein of blood clots; (2) converts prourokinase to urokinase — enhancing the body's natural clot dissolution system; (3) increases tissue plasminogen activator (tPA) — the enzyme that activates plasminogen to plasmin; (4) degrades plasminogen activator inhibitor-1 (PAI-1) — removing the brake on your clot-dissolving system. This multi-target approach is why nattokinase is so potent — it's not just a blood thinner, it's actively dissolving existing clots while preventing new ones.
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.