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Head-to-head evidence comparison — which supplement is right for you?
Nattokinase vs Omega-3: Omega-3 has the stronger overall evidence (9 vs 6/10); they're alternatives for support heart health — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Omega-3 wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mostly mechanism / observational
0 of 1 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
10 of 15 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Nattokinase and Omega-3 have evidence — compare verdict strength side-by-side.
2000-4000 FU (fibrinolytic units)
No particular time of day or relation to meals is established
Capsules standardized to FU
2-3g combined EPA+DHA daily (a typical label dose, not the dose used in the cited trials, which gave 1 g or 3.25 g of omega-3 a day, or 1 to 4 g of fish oil a day without stating its EPA+DHA content)
With meals containing fat
Triglyceride form fish oil
2-8 weeks
4-8 weeks
4-8 weeks
2-4 weeks
Immediate
4-12 weeks
Research Progress of Nattokinase in Reducing Blood Lipid
Nutrients (2025) · Review
Narrative review of nattokinase and blood lipids, covering its proposed mechanisms (HSL activation, HMG-CoA reductase inhibition, lipoprotein lipase), clinical studies and safety.
Navigating the Effects of Anti-Atherosclerotic Supplements and Acknowledging Associated Bleeding Risks
International journal of molecular sciences (2025) · Review
Omega-3 fatty acids, berberine, garlic, and nattokinase exert favorable metabolic and vascular effects, yet their clinical efficacy depends on formulation, dosage, and patient characteristics and may be limited by bleeding risk or drug interactions.
Fermented Fruits, Vegetables, and Legumes in Metabolic Syndrome: From Traditional Use to Functional Foods and Medical Applications
Nutrients (2025) · Review
Fermented fruits and vegetables, including table olives, caper fruits, and kimchi, contain polyphenols and probiotic bacteria, which are beneficial in terms of obesity and impaired glucose and lipid metabolism.
Marine n-3 Fatty Acids and Prevention of Cardiovascular Disease and Cancer
The New England journal of medicine (2019) · Rct · n=25871
During a median follow-up of 5.3 years, a major cardiovascular event occurred in 386 participants in the n-3 group and in 419 in the placebo group (hazard ratio, 0.92; 95% confidence interval [CI], 0.80 to 1.06; P=0.24).
Omega-3 fatty acids for intermittent claudication
The Cochrane database of systematic reviews (2024) · Meta analysis · n=1830
Omega-3 compared with a control may have little to no effect on ankle-brachial index (MD -0.02, 95% CI -0.08 to 0.04; 3 studies, 168 participants; very low-certainty evidence).
A systematic review and meta-analysis of the omega-3 fatty acids effects on brain-derived neurotrophic factor (BDNF)
Nutritional neuroscience (2024) · Meta analysis · n=587
12 RCTs with 587 subjects: omega-3 supplementation increased serum BDNF versus placebo (SMD 0.72, 95% CI 0.28 to 1.15), with high heterogeneity (I2 = 84.39%).
No trial of nattokinase alone found a lipid effect at either dose tested. In a 3-year double-blind RCT in 265 adults (PMID 33843667), 2,000 FU a day had no effect on any laboratory measure, lipids included, or on carotid atherosclerosis. In a 2-month open-label study in 45 adults (PMID 19358933), 4,000 FU a day (2 capsules of 2,000 FU) left blood lipids unaffected. The lipid benefits in the nattokinase-monascus (PMID 37836525) and red yeast rice combination trials (PMID 38812930) cannot be credited to nattokinase alone, and their abstracts give no nattokinase dose.
The points are the dose bands of a meta-analysis of 10 randomised trials with 1,426 adults (PMID 37028202): EPA-rich products at 1 to under 2 g of EPA a day reduced depression severity (SMD -0.43), while 2 g a day or more did not (SMD -0.20, not significant), so the 2 g point is plotted as no effect. Doses are grams of EPA, not EPA plus DHA. The Cochrane review of 33 placebo-controlled trials found a small to modest effect, unlikely to be clinically meaningful and rated very low certainty, with no difference in remission or response (PMID 34817851). No trial compared doses directly.
AI-estimated from published studies. Interpret as directional guidance.
Omega-3 has a higher evidence score (9/10 vs 6/10) and wins in 3 of 3 categories.
For support heart health, Nattokinase has a higher relevance score (88 vs 82).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
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The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.