What is the recommended dose of Nattokinase?

- **Look for:** Minimum 2,000 FU (fibrinolytic units) per capsule; vitamin K2-free (this is critical — natto contains K2 which promotes clotting); NSK-SD or NSP branded nattokinase; enteric-coated ...

Is Nattokinase safe to take daily?

Nattokinase is rated "Generally Safe" based on clinical evidence. Always consult your healthcare provider before starting any supplement.

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Ingredient Research

Graded against 173,636 supplements + 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, NIH DSLD

Nattokinase

MODERATE EVIDENCESupplementLast updated

AVELOR SUMMARY

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.

WHAT IT DOES

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.

OPTIMAL DOSAGE

Look for: Minimum 2,000 FU (fibrinolytic units) per capsule; vitamin K2-free (this is critical — natto contains K2 which promotes clotting); NSK-SD or NSP branded nattokinase; enteric-coated
Avoid: Products measured only in mg without FU activity units (enzyme potency matters, not weight); natto food as nattokinase source (contains K2); products combined with other blood-thinning supplements
Minimum effective dose: 2,000 FU/day
Third-party tested brands: Doctor's Best (NSK-SD), NOW Foods (nattokinase), Jarrow Formulas

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SAFETY PROFILE

Critical Interactions (Do Not Combine Without Medical Supervision)

Moderate Interactions (Monitor Closely)

Theoretical/Low-Risk Interactions

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Independently graded against 173,636 indexed supplements with 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, and NIH DSLD | Last updated:

Not medical advice. Based on published clinical research and systematic reviews.

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