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Nattokinase

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Nattokinase. Fermented soy serine protease with fibrinolytic activity.

How it works. Degrades fibrin directly and activates plasminogen activators.

What the research supports. 1 graded claims. Strongest: Lowers blood pressure and fibrinogen (moderate).

How much to take. Typical dose: 2000 FU (≈100 mg).

Side effects and interactions. 1 medication interaction listed. Serious: Bleeding risk if combined with anticoagulants.

Stacking. Pairs well with Omega-3, CoQ10.

Common forms. Available as Capsule or softgel, Powder, Sublingual or buccal, Liposomal liquid.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Nattokinase. Anecdotes are not medical advice.

Nattokinase. Fermented soy serine protease with fibrinolytic activity.

No single structure

What it is

Fermented soy serine protease with fibrinolytic activity.

Food sources

Endogenously produced or biosynthesized moleculeStandardized pharmaceutical- or food-grade supplementCombined with cofactors that improve absorption or activity

Goals

Cardiovascular Health

How it works

Degrades fibrin directly and activates plasminogen activators.

Pathways

  • Degrades fibrin directly
  • activates plasminogen activators

Effects

  • ↓blood pressure and fibrinogen decreases

What the research supports

Lowers blood pressure and fibrinogenmoderate

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
2000 FU (≈100 mg)
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodEither
Best formMost evidence is based on the capsule or softgel form.
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Side effects & interactions

Common side effects

  • GI upset

Serious

  • Bleeding risk if combined with anticoagulants

Medication interactions

Anticoagulants/Antiplateletssevere

Major bleeding risk; do not combine.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • Omega-3Anti-inflammatory cardiovascular synergy.
  • CoQ10Supports mitochondrial energetics in cardiac tissue.

Common forms

  • Capsule or softgel
  • Powder
  • Sublingual or buccal
  • Liposomal liquid

Key studies

8 studies cited in total.

PubMed: Nattokinase — Lowers blood pressure and fibrinogen ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Nattokinase and "Lowers blood pressure and fibrinogen". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Nattokinase — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Nattokinase and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Nattokinase — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Nattokinase and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

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