Nattokinase
Nattokinase is a supplemental form of nattokinase. An enzyme isolated from natto (fermented soybeans). 1 studies on nattokinase are available in our database. Learn how nattokinase compares to other forms.
Content reviewed by ZYNAVA Research Team · Last updated February 2026 · Editorial policy
What Is Nattokinase?
Nattokinase is a supplemental form of nattokinase. An enzyme isolated from natto (fermented soybeans). Labels may use FU (fibrinolytic units) to describe activity.
How Nattokinase Compares
Nattokinase is also available as NSK-SD.
About Nattokinase
An enzyme isolated from natto (fermented soybeans).
Find Nattokinase Supplements
Compare nattokinase products and explore your options.
Other Nattokinase Forms
Compare different forms of nattokinase and explore your options:
Research on Nattokinase
Our database contains 1 peer-reviewed studies on nattokinase:
FAQ: Nattokinase
What is Nattokinase?
Nattokinase is a supplemental form of nattokinase. An enzyme isolated from natto (fermented soybeans). Labels may use FU (fibrinolytic units) to describe activity.
How does Nattokinase compare to other forms?
Nattokinase is also available as NSK-SD.
What other forms of Nattokinase are available?
Nattokinase is also available as Nattokinase NSK-SD. The best form depends on individual absorption, tolerance, and specific needs.
Natural Food Sources of Nattokinase
Before considering supplementation, it is worth exploring dietary sources of nattokinase. Whole foods provide nutrients in their natural matrix alongside fiber, enzymes, and other beneficial compounds that can enhance absorption and utilization.
- Lean meats — Complete protein sources providing all essential amino acids
- Eggs — Considered one of the highest-quality protein sources with excellent amino acid balance
- Dairy products — Whey and casein proteins contain all essential amino acids
- Legumes — Good plant-based protein sources, though may lack some essential amino acids
- Soy products — Tofu and tempeh are complete plant proteins with all essential amino acids
Dietary Context
Amino acids are the building blocks of protein and can be obtained from a wide range of protein-rich foods. Essential amino acids must come from the diet, while the body can synthesize non-essential amino acids. Individual amino acid supplements provide concentrated doses of specific amino acids, which may be useful when dietary intake is insufficient for specific purposes.
Absorption: Food vs. Supplements
Amino acids from whole food proteins are released during digestion and absorbed in the small intestine. Free-form amino acid supplements are absorbed more rapidly since they don't require digestion. However, whole food proteins provide a complete amino acid profile along with other nutrients.
Practical Tips
- A varied diet with adequate protein from multiple sources typically provides all essential amino acids
- Combining plant proteins (grains + legumes) can provide a complete amino acid profile
- Individual amino acid supplements are best taken on an empty stomach for optimal absorption
How to Take Nattokinase
Getting the most from nattokinase supplementation involves more than just choosing the right product. When and how you take it can significantly affect absorption and effectiveness.
Best time to take: Varies by herb — check specific guidance
With or Without Food
Many herbal supplements are better tolerated when taken with food. Fat-soluble herbal compounds (like curcumin) benefit from being taken with a fat-containing meal.
How Often
Typically 1-3 times daily. Many herbs take weeks of consistent use before effects are noticeable.
Practical Tips
- Consistency is key — many herbs require weeks of regular use for noticeable effects
- Some practitioners recommend cycling herbal supplements (e.g., 8 weeks on, 2 weeks off)
- Start with lower doses and increase gradually to assess tolerance
Important Interactions
- Many herbs can interact with prescription medications — always inform your healthcare provider
- St. John's Wort is particularly known for numerous drug interactions
- Pregnant and breastfeeding women should consult a provider before using herbal supplements
This is not an exhaustive list of interactions. Always consult a healthcare provider or pharmacist about potential interactions with your specific medications and health conditions.
Where to Find Nattokinase Supplements
If you are considering nattokinase supplementation, choosing a quality product from a reputable retailer is an important step. Here are some trusted options where you can browse and compare nattokinase supplements.
How to Choose a Quality Nattokinase Supplement
- Verify the expiration date and that the product is stored appropriately
- Research the brand — established companies with transparent testing are generally more reliable
- Consider subscription options for supplements you plan to take long-term — many retailers offer discounts
- Check the other ingredients list for potential allergens (soy, gluten, dairy, nuts)
To explore supplements by ingredient or health goal, try our AI Supplement Advisor.
Important Information
Smart Supplement Shopping — Comparing Value
Supplement pricing can be confusing because products vary in serving sizes, ingredient amounts, forms, and number of servings per container. A product that appears cheaper may actually cost more per effective dose when you account for these variables. ZYNAVA's price comparison tools calculate the cost per serving and cost per milligram to help you make apples-to-apples comparisons between products.
When evaluating supplement value, consider factors beyond price alone: the form and bioavailability of ingredients, whether the product has third-party testing, the reputation of the manufacturer, and whether the product contains unnecessary fillers or additives. The cheapest product is not always the best value, and the most expensive product is not always the highest quality. Our goal is to give you the data needed to find the right balance of quality and affordability for your budget.
Our Commitment to Editorial Independence
ZYNAVA maintains strict editorial independence from supplement manufacturers, retailers, and advertisers. Our research summaries are based on peer-reviewed studies indexed in databases such as PubMed, Cochrane Library, and other scientific repositories. We do not accept payment from supplement brands to feature, promote, or favorably review their products. Our evidence grading system applies consistent criteria to all supplements regardless of commercial relationships.
Every supplement page on ZYNAVA is generated using the same data-driven methodology. We do not cherry-pick studies to support a predetermined conclusion. When evidence is mixed or insufficient, we say so clearly. Our editorial policy requires transparent disclosure of study limitations, conflicts of interest, and the overall quality of available evidence.
This content is for general educational purposes only and is not intended as medical advice. Consult a healthcare professional before starting any supplement. See our full disclaimer and affiliate disclosure.