Nattokinase vs Urolithin A

Mechanism

Nattokinase is a fibrinolytic serine protease extracted from natto (fermented soybeans). It directly degrades fibrin (the structural protein of blood clots) through four mechanisms: direct fibrinolysis, enhancement of endogenous tPA (tissue plasminogen activator) production, conversion of prourokinase to urokinase, and degradation of PAI-1 (plasminogen activator inhibitor-1). It also reduces blood viscosity and may inhibit ACE (angiotensin-converting enzyme), providing mild antihypertensive effects.

Standard Dosing

2000-4000 FU (fibrinolytic units) daily, equivalent to 100-200mg

Timing

On empty stomach, between meals or before bed. Morning and evening split dosing for 24-hour fibrinolytic coverage.

Cycle Duration

ongoing

Side Effects

• Easy bruising
• Nosebleeds
• GI upset
• Rare: serious bleeding events

Contraindications

• Active bleeding or bleeding disorders
• Scheduled surgery (discontinue 2+ weeks prior)
• Concurrent anticoagulant/antiplatelet therapy
• Hemorrhagic stroke history
• Soy allergy
• Active bleeding
• Bleeding disorders
• Pre-surgery (stop 2 weeks prior)
• Concurrent anticoagulation therapy without physician supervision

Best Stacking Partners

Mechanism

Gut metabolite of ellagitannins that activates mitophagy — selective clearance of damaged mitochondria. Improves mitochondrial function, muscle endurance, and cellular energy production. Only ~40% of population can produce it endogenously.

Contraindications

• Limited long-term safety data beyond 4 months