Statins are among the most widely prescribed medications in the world, and many people who take them are also curious about nattokinase, a fibrinolytic enzyme derived from fermented soybeans that has gained attention for cardiovascular support. If you are on a statin such as atorvastatin, rosuvastatin, or simvastatin, the first question is straightforward: is it safe to add nattokinase? The short answer is that no formal, documented drug interaction between nattokinase and statins has been established, but that is different from saying the combination has been proven safe in controlled trials, and there are still reasons to loop in your physician before combining them.
This article separates what is actually known about nattokinase-statin co-use from what is simply theoretical, and explains why nattokinase’s own risk profile matters more than any statin-specific interaction.
Key Takeaways
- Pharmacist-reviewed interaction databases do not list a documented interaction between nattokinase and common statins like atorvastatin.
- Absence of a documented interaction is not the same as proof of safety, statins and nattokinase have not been studied together in controlled human trials.
- Some preclinical and mechanistic research suggests nattokinase may have complementary, not conflicting, effects on lipid metabolism alongside statins, but a 2023 meta-analysis of randomized trials found no significant lipid lowering at relatively low doses [3].
- The real caution with nattokinase is its own fibrinolytic and antiplatelet activity, which matters most if you also take a blood thinner or antiplatelet drug alongside your statin.
- Always disclose nattokinase use to your prescribing physician or pharmacist, especially if you take other cardiovascular medications.
What Interaction Checkers and Pharmacists Say
Drug-supplement interaction databases used by pharmacists generally report no known interaction between nattokinase and atorvastatin, one of the most commonly prescribed statins. The same holds for combinations involving other lipid-lowering drugs such as ezetimibe and pravastatin, no established interaction has been documented in the pharmacological literature reviewed by these tools.
That reassurance comes with an important caveat that pharmacists themselves flag: a lack of a documented interaction usually reflects a lack of dedicated research, not a guarantee of safety. Nattokinase and statins have not been studied together in randomized controlled trials designed specifically to assess their combined use. The absence of red flags in interaction-checker databases is reassuring but not conclusive.
Why Nattokinase and Statins May Actually Be Complementary
Mechanistically, nattokinase and statins act on cardiovascular risk through different pathways, and some research suggests these pathways may be complementary rather than conflicting. Statins primarily work by inhibiting HMG-CoA reductase, the rate-limiting enzyme in cholesterol synthesis, which lowers LDL cholesterol. Nattokinase’s proposed lipid effects are unclear. A 2023 meta-analysis of randomized trials found no significant lipid lowering at relatively low doses, and total cholesterol was slightly higher in the nattokinase groups than in controls [3].
Research note: In a small 2017 carotid trial comparing the two, simvastatin lowered TC, LDL-C and triglycerides significantly more than nattokinase did, although nattokinase also lowered them [10].
A 2025 review in the journal Nutrients examining nattokinase’s role in blood lipid reduction noted that, compared with traditional lipid-lowering drugs, nattokinase works through a multifaceted mechanism and may offer a complementary role when combined with statins, fibrates, or other lipid-modifying agents in reducing overall cardiovascular disease risk. This is preliminary and mechanism-based reasoning rather than confirmed clinical outcome data, but it does not suggest a conflict between the two.
Human lipid data are less encouraging. A 2023 meta-analysis of randomized trials found no significant lipid lowering at relatively low doses, and a 2025 review says short-term, low-dose nattokinase may not significantly reduce lipid levels. One placebo-controlled trial that did lower LDL used a product combining nattokinase with lovastatin from red yeast rice, so that result cannot be credited to nattokinase alone [8][3][9].
The Real Caution: Nattokinase’s Own Bleeding Risk Profile
The more relevant safety conversation for statin users is not statin-specific, it is the same fibrinolytic and antiplatelet caution that applies to anyone considering nattokinase. In lab and animal studies nattokinase degrades fibrin and inhibits platelet aggregation, independent of any interaction with cholesterol-lowering drugs, and human interaction data are lacking [4][5][6].[1] If you are on a statin and also take aspirin, clopidogrel, warfarin, or a direct oral anticoagulant for a separate cardiovascular indication, that combination, not the statin itself, is where meaningful bleeding-risk caution applies.
Many people prescribed statins are managed for broader cardiovascular risk and may also be on low-dose aspirin or another antiplatelet for primary or secondary prevention. In that context, it is the antiplatelet or anticoagulant drug, not the statin, that creates the interaction risk worth discussing with a physician before adding nattokinase.
Real-World Safety Signals
An open-label study of 153 vascular surgery patients, with no placebo group, recorded no adverse drug reactions or interactions with nattokinase alongside their usual medications, which for many would have included statins. Its authors still warned that people on nattokinase should have their coagulation parameters monitored [7]. This kind of real-world safety signal is reassuring, though it is not a substitute for a dedicated interaction trial, and individual results and risk profiles vary.
What to Actually Do Before Combining Them
If you are taking a statin and are not on any anticoagulant or antiplatelet medication, the interaction risk specific to statins appears low based on current pharmacist-reviewed data and mechanistic research. Even so, disclose your interest in nattokinase to your physician or pharmacist, particularly if you have any other cardiovascular condition, take multiple medications, or have a personal or family history of bleeding disorders.
If you are on a statin plus any blood thinner or antiplatelet drug, treat that combination, not the statin, as the priority safety conversation. Bring the specific nattokinase product and dose (measured in FU, fibrinolytic units) to that conversation so your provider can assess your full medication picture.[2]
A Note on the Evidence
No dedicated randomized controlled trial has specifically tested nattokinase combined with statins for safety or interaction outcomes; the information here reflects interaction-database findings, mechanistic research, and observational safety data, not a confirmed clinical consensus. This is educational information, not medical advice. Anyone on statins or any other prescription cardiovascular medication should consult their physician or pharmacist before adding nattokinase.
Frequently Asked Questions
Can I take nattokinase with atorvastatin?
Pharmacist-reviewed interaction checkers do not list a known interaction between nattokinase and atorvastatin. However, this reflects a lack of dedicated research rather than proof of safety, so it is still worth mentioning to your physician or pharmacist, especially if you take other medications.
Does nattokinase interfere with how statins work?
There is no evidence that nattokinase blocks or reduces a statin’s cholesterol-lowering effect. Some research suggests the two may work through complementary mechanisms on lipid metabolism, though this has not been confirmed in dedicated combination trials.
Is it the statin or something else I should worry about?
The main safety concern with nattokinase is its fibrinolytic and antiplatelet activity, which matters most if you also take a blood thinner such as warfarin or an antiplatelet drug such as aspirin or clopidogrel, not the statin itself.
Should I tell my doctor if I want to try nattokinase while on a statin?
Yes. Even without a documented statin-specific interaction, disclosing all supplements to your physician or pharmacist ensures your complete medication list is considered, particularly if you have other cardiovascular risk factors or take additional medications.
References
- Nattokinase: An Oral Antithrombotic Agent for the Prevention of Cardiovascular Disease. International Journal of Molecular Sciences (2017). PMID 28264497
- Nattokinase: production and application. Applied Microbiology and Biotechnology (2014). PMID 25348469
- Li X et al. Nattokinase Supplementation and Cardiovascular Risk Factors: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Reviews in cardiovascular medicine (2023). PMID 39076715
- Ja‐Young Jang et al. Nattokinase improves blood flow by inhibiting platelet aggregation and thrombus formation. Laboratory Animal Research (2013). PMID 24396387
- Chen H et al. Nattokinase: A Promising Alternative in Prevention and Treatment of Cardiovascular Diseases. Biomarker insights (2018). PMID 30013308
- Jae-Bum Kim et al. Evaluation of Nattokinase for Antithrombotic Effect and Pharmacological Efficacy by a Biological Test and Clinical Trial. KSBB Journal (2011). doi:10.7841/ksbbj.2011.26.5.393
- Gallelli G et al. Data Recorded in Real Life Support the Safety of Nattokinase in Patients with Vascular Diseases. Nutrients (2021). PMID 34199189
- Maria-Zinaida Dobre et al. Navigating the Effects of Anti-Atherosclerotic Supplements and Acknowledging Associated Bleeding Risks. International Journal of Molecular Sciences (2025). PMID 41155474
- Liu X et al. The Effect of Nattokinase-Monascus Supplements on Dyslipidemia: A Four-Month Randomized, Double-Blind, Placebo-Controlled Clinical Trial. Nutrients (2023). PMID 37836525
- Ren NN et al. [A clinical study on the effect of nattokinase on carotid artery atherosclerosis and hyperlipidaemia]. Zhonghua yi xue za zhi (2017). PMID 28763875
These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. Content is for informational purposes only and is not medical advice; consult a qualified healthcare provider before starting any supplement. As an Amazon Associate we earn from qualifying purchases.
