Question explored with the scientific record
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- 1 what is naltrexone for/do? + a private exchange
- 2 what about use in long covid? + a private exchange
- 3 wgat does CoQ10 400mg do + a private exchange
- 4 Nattokinase what does it do?
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Nattokinase what does it do?
Nattokinase is a clot-dissolving enzyme from fermented soybeans. The lab and animal work is real. Proof that it prevents heart attacks or strokes in people is not in this evidence.
It is a protease, an enzyme that cuts proteins. Its target is fibrin, the mesh that holds a blood clot together [2]. In the lab it breaks down fibrin and fibrinogen directly [1], and it degraded abnormal microclots in a dish [4]. In rats it shrank laser-induced thrombi, and a 14-week diet lowered fibrinogen from 375.6 to 206.9 mg/dl [5]. Those are rats, not people.
The one human trial gave a single dose to healthy young men. It nudged D-dimer, factor VIII, and antithrombin, all lab markers, not outcomes like heart attack or death [3]. A single dose in healthy volunteers cannot tell you whether it prevents anything.
| Finding | Model | What it shows |
|---|---|---|
| Fibrin breakdown | Lab dish | Enzyme cuts fibrin [2][1] |
| Microclot degradation | Lab dish | Reduced clot formation [4] |
| Thrombus shrinkage | Rats | Dose-dependent lysis [5] |
| Clotting markers | 1 dose, healthy men | Small lab shifts [3] |
Nothing here measures heart attacks, strokes, or death. Nothing here is a long-term safety study. Nattokinase thins the blood, so bleeding risk is the obvious concern, and this evidence does not quantify it.
My call: it does what an enzyme that digests fibrin does in a dish and in rats, but no human trial here shows it prevents a real event, so the benefit is unproven. Confidence: low.
Sources used 5
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Purification and characterization of recombinant nattokinase from Bacillus subtilis R0H1
This study purified and characterized recombinant nattokinase produced by Bacillus subtilis R0H1 using a two-step membrane filtration method, achieving high recovery (>80%), a 3.2-fold purification, and detailing its kinetic parameters, pH/temperature optima, metal ion effects, …
DOI: 10.15625/1811-4989/16027 -
A novel fibrinolytic enzyme (nattokinase) in the vegetable cheese Natto; a typical and popular soybean food in the Japanese diet
This study identifies and characterizes a novel fibrinolytic enzyme, nattokinase, found in Natto, a traditional Japanese soybean food, demonstrating its potential therapeutic applications in fibrinolytic therapy.
DOI: 10.1007/BF01956052 -
A single-dose of oral nattokinase potentiates thrombolysis and anti-coagulation profiles
This study investigates the effects of a single-dose of nattokinase on coagulation and fibrinolysis parameters in healthy young males, demonstrating significant changes in D-dimer concentrations, factor VIII activity, and antithrombin levels, suggesting its potential as a fibrin…
DOI: 10.1038/srep11601 -
Automated, Microscopic Measurement of Fibrinaloid Microclots and Their Degradation by Nattokinase, the Main Natto Protease
Recombinant nattokinase degraded ThT-positive fibrinaloid microclots in vitro, and automated fluorescence microscopy tracked microclot number, intensity, and size over time.
DOI: 10.62767/jecacm504.6557 -
The Effect of Dietary Bacillus Natto Productive Protein on in vivo Endogenous Thrombolysis
In rats, 14 weeks of dietary Bacillus natto productive protein (BNPP) enhanced endogenous thrombolysis dose-dependently; 1% BNPP matched 0.2 mg/kg i.v. t-PA and lowered plasma fibrinogen, while argatroban was not additive.
DOI: 10.1159/000077822