ByDr. Brennan Commerford, Chiropractic Physician·Last reviewed: April 2026
Systemic EnzymesModerate Evidence

Lumbrokinase vs Nattokinase: Which Systemic Enzymes Is Better?

Evidence-based comparison of bioavailability, absorption, and clinical use — 2026

Quick Answer

Lumbrokinase vs Nattokinase: which is better?

Nattokinase is our top-ranked form of Systemic Enzymes with high absorption bioavailability. It outperforms Lumbrokinase based on peer-reviewed absorption research.

Our recommendation: Nattokinase

High AbsorptionAbsorption Rating

Nattokinase is the expert-recommended form based on bioavailability research.

Lumbrokinase

Lumbrokinase (20,000 LKU/mg)

Formulary Tier
T2 — Specialist
Bioavailability
S2
Dose Range
—
Therapeutic Class
cardiovascular
vs
Preferred Form

Nattokinase

Nattokinase (2,000 FU/100mg)

Formulary Tier
T1 — Preferred
Bioavailability
S2
Dose Range
—
Therapeutic Class
cardiovascular

Absorption Rating

High AbsorptionvsHigh Absorption

Dose Range

not yet documented in our databasevsnot yet documented in our database

Expert Ranking

Highly RatedvsTop Ranked

Therapeutic Class

CardiovascularvsCardiovascular

Bioavailability by Form

S2 — Good
Lumbrokinase
S2 — Good
Nattokinase

Absorption & Bioavailability

When it comes to Systemic Enzymes supplementation, form selection is one of the most consequential decisions you can make. Different chemical forms of Systemic Enzymes vary significantly in how well your body absorbs and uses them — and Lumbrokinase vs Nattokinase is one of the most commonly compared pairs.

Lumbrokinase and Nattokinase share the same bioavailability tier (good (S2)).

Lumbrokinase carries a bioavailability tier of S2 (good (S2)) and is classified as T2 Specialist in the FormulaForge formulary. Nattokinase carries a bioavailability tier of S2 (good (S2)) and is classified as T1 Preferred.

Lumbrokinase is a complex of fibrinolytic enzymes derived from earthworms (Lumbricus rubellus), standardized to 20,000 LKU/mg. Research suggests it may have broader fibrin-degrading activity than nattokinase, with the ability to act on both fibrin clots and fibrin degradation products. Used in functional medicine for cardiovascular and circulatory support.

Dosing Comparison

Recommended dose ranges reflect both the potency and bioavailability of each form. Dosing data for Lumbrokinase is being compiled, while dosing data for Nattokinase is also being compiled.

Because forms with lower bioavailability require a larger amount to deliver equivalent absorbed nutrient, dose ranges should not be compared interchangeably between forms without accounting for these differences. Speak with your healthcare provider to determine the appropriate dose for your goals.

Side Effects & Tolerability

Both Lumbrokinase and Nattokinase are generally well-tolerated at recommended doses. Always consult a healthcare provider before starting any new supplement, particularly if you have existing health conditions or take medications.

Consult your healthcare provider before starting or changing a supplement regimen. These statements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease.

Who Should Choose Lumbrokinase vs Nattokinase?

Choose Lumbrokinase if: your healthcare provider has recommended it for a specific therapeutic goal, or you require a specialist form not covered by the T1 preferred option.

Choose Nattokinase if: bioavailability is a priority, you are focused on supporting cardiovascular function, or you want the form with the strongest formulary evidence.

Speak with your healthcare provider for personalized guidance. The best Systemic Enzymes form for you depends on your individual health goals, existing nutrient status, and the dose your provider recommends.

These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare provider before starting or changing a supplement regimen.

Frequently Asked Questions

Is Lumbrokinase better than Nattokinase?
Nattokinase (2,000 FU/100mg) is classified as T1 Preferred in the FormulaForge formulary, while Lumbrokinase (20,000 LKU/mg) is T2 Specialist. This reflects a research-based assessment of relative bioavailability for each form. "Better" depends on your individual goals and healthcare provider's guidance — the higher-tier form generally indicates more efficient absorption.
How much Lumbrokinase should I take compared to Nattokinase?
Dosing information for Lumbrokinase (20,000 LKU/mg) and Nattokinase (2,000 FU/100mg) is being compiled in our database. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen.
What is the difference between Lumbrokinase and Nattokinase?
Lumbrokinase (20,000 LKU/mg) and Nattokinase (2,000 FU/100mg) are two distinct chemical forms of Systemic Enzymes. Lumbrokinase has a bioavailability rating of good (S2) and is classified as T2 Specialist, while Nattokinase has a rating of good (S2) and is classified as T1 Preferred. These differences mean the two forms are not interchangeable at equal doses and may suit different health goals.
Which form of Systemic Enzymes is best absorbed — Lumbrokinase or Nattokinase?
Based on our formulary bioavailability data, Lumbrokinase (20,000 LKU/mg) has a higher absorption rating (good (S2)) compared to Nattokinase (2,000 FU/100mg) (good (S2)). Higher bioavailability means more of the active compound reaches systemic circulation per dose unit. We do not publish raw dose conversion ratios or proprietary calculation methodology.
Can I switch from Nattokinase to Lumbrokinase?
Switching between Nattokinase and Lumbrokinase is possible but requires dose adjustment due to differences in bioavailability. Because the two forms have different absorption rates, an equal milligram dose will not deliver the same absorbed amount. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen. Do not self-adjust dosing when switching supplement forms.
What does research say about Lumbrokinase vs Nattokinase?
Published bioavailability research forms the basis for our formulary tier assignments. Lumbrokinase (20,000 LKU/mg) is rated good (S2) and classified as T2 Specialist; Nattokinase (2,000 FU/100mg) is rated good (S2) and classified as T1 Preferred. Our formulary citations are drawn from peer-reviewed absorption studies. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.

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FormulaForge formulates and sells supplements containing the ingredients discussed on this page. Our formulary recommendations are based on peer-reviewed bioavailability research. All cited studies are independently verifiable.