Glucoraphanin (Broccoli Seed Extract) vs Nattokinase

Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.

Glucoraphanin (Broccoli Seed Extract)Nattokinase
CategorySupplementsSupplements
Standard Dose2000-4000 FU (fibrinolytic units) daily, equivalent to 100-200mg
TimingOn empty stomach, between meals or before bed. Morning and evening split dosing for 24-hour fibrinolytic coverage.
Cycle Durationongoing
Evidence LevelModerate-Strongmoderate_human

Mechanism

Stable precursor to sulforaphane. Requires myrosinase enzyme (from gut bacteria or co-administered) for conversion. Provides sustained sulforaphane release compared to direct supplementation. Activates Nrf2 pathway for antioxidant and detoxification gene expression.

Contraindications

  • Thyroid conditions (goitrogen at very high doses)
B

Nattokinase

Supplements

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

SerrapeptaseOmega-3Vitamin K2 (for balanced coagulation support)

Buy these compounds

Fast buy links (we may earn a small commission at no extra cost).

Search Glucoraphanin (Broccoli Seed Extract) on Amazon →Search Nattokinase on Amazon →Search Glucoraphanin (Broccoli Seed Extract) on iHerb →Search Nattokinase on iHerb →

Not sure which is right for you?

Take our free assessment to get personalized recommendations based on your health goals, current stack, and biomarkers.

Get Your Free Protocol →or take the assessment →