Nattokinase Supplements Review & Top Picks

Latest Update: Nattokinase Supplements Fall Short

Nattokinase supplements are frequently marketed for their potential cardiovascular advantages. However, clinical evidence remains limited regarding their ability to reduce blood clots—though a decrease in clotting factors has been observed—as well as their efficacy in lowering blood pressure, cholesterol, triglycerides, or slowing the progression of atherosclerosis.

When selecting a nattokinase supplement, it is essential to prioritize products that specify their enzyme activity in FU (fibrinolytic units). Relying solely on milligram measurements is insufficient, as the potency of nattokinase can vary significantly. Ideally, seek out products that offer between 1,000 and 2,000 FU per serving. Furthermore, verify that the enzyme activity has been confirmed by a reputable independent third party, such as ConsumerLab.com.

ConsumerLab’s testing revealed that only five out of eight evaluated nattokinase supplements contained the amount of enzyme activity stated on their labels within an acceptable margin. Two products fell significantly short of their claims, while one exceeded them. Among the supplements that met quality standards, one was identified as a “Top Pick” due to its exceptional value and appropriate dosage.

The nattokinase supplements evaluated in this study included offerings from Allergy Research Group, Doctor’s Best, Double Wood, NOW, Nutricost, and Toku Flow, alongside Nattovena (Arthur Andrew Medical) and NSK-SD (Pure Encapsulations).

While short-term use of nattokinase is generally considered safe, individuals taking blood thinners or blood-pressure-lowering medications should exercise caution. Additionally, nattokinase may increase the risk of bleeding following surgery or physical trauma. Because many of these supplements are derived from soy, they should be avoided by those with soy allergies. Be aware that nattokinase itself can trigger severe allergic reactions in some individuals.

In addition to its expert laboratory testing, ConsumerLab utilizes high-quality, evidence-based information sources. These include peer-reviewed research, as well as data from agencies such as the FDA, the USDA, and the National Academy of Medicine. For emerging topics, pre-print journals may also be referenced. All content is reviewed by medical doctors and experts in pharmacology, toxicology, and chemistry. Information is updated and medically reviewed on an ongoing basis to ensure accuracy and reliability.

Ensure you are selecting the most effective nattokinase supplements verified by our testing protocols.

Nattokinase supplements compared in this review: Allergy Research Group Nattokinase 100 mg, Arthur Andrew Medical Nattovena, Doctor’s Best Nattokinase, Double Wood Supplements Nattokinase 4,000 FU, NOW Nattokinase 100 mg, Nutricost Nattokinase 2,000 FU, Pure Encapsulations NSK-SD 100 mg, and Toku Flow 10,800 FU Nattokinase – Chocolate.

Membership is required to access full test results, expert recommendations, and quality ratings. This includes detailed findings for the eight nattokinase supplements selected for this evaluation.

In this comprehensive review, you will discover: which nattokinase supplements passed or failed ConsumerLab.com’s testing; which products offer the best value and our top recommendations; the current evidence regarding nattokinase for blood clot reduction, blood pressure management, cholesterol and triglyceride control, and atherosclerosis progression; appropriate dosages for various applications; and potential side effects, allergic reactions, and drug interactions.