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Luma Insider
Wellness Health 5 min read

The 5 Best Nattokinase Supplements in 2025

Author Jake L.

Jake L.

US Army Veteran • Tuesday 24 , 2025

Nattokinase is a powerful enzyme derived from fermented soybeans (Natto), widely known for its natural ability to support circulation and cardiovascular health. It works by helping to break down fibrin—a protein involved in blood clotting—making it a promising option for promoting healthy blood flow and heart function.

But not all nattokinase supplements are created equal. Some brands use weak doses, others add unnecessary fillers, and many skip third-party testing altogether. That’s why we’ve reviewed the top nattokinase supplements of 2025 to highlight the ones that are truly worth your trust.

What To Look For In A Nattokinase Supplement

  • Powerful Dosage

    You want a product that delivers at least 2,000 FU (fibrinolytic units) of nattokinase per serving. 4,000 FU is even better..

  • Money-Back Guarantee

    Brands that offer a 90-day guarantee show confidence in their product. It gives you time to try the supplement and feel the difference (risk free).

  • Fair and Hassle-Free Returns

    It should be easy to return a product if it doesn’t work for you. Avoid brands with unclear or restrictive return policies—look for those that make the process simple and honest.

What to Avoid

  • Low FU Dosage

    Some brands offer just 1,000 FU or don’t even specify the unit. Without the right dose, you likely won’t see any benefit.

  • Soy-Free Claims

    If a brand claims to be soy-free but doesn’t provide details on sourcing or extraction—be cautious. Always look for transparency.

  • No refund policy

    If there’s no money-back guarantee, think twice. Reliable brands make it easy to return a product if it doesn’t work for you.

  • The Cheapest Option

    Cheaper products often mean weak doses, fillers, or poor sourcing. For something you take daily, it’s worth paying for quality.

#1 choice

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Top 5 Nattokinase Supplements in 2025

1. Nattokinase

by Luma Nutrition

Product image
A+ Overall Grade *
Product image
Overall Grade * A+
REVIEW SCORE 4.9 EXCELLENT
BASED ON 1,477 REVIEWS
  • Benefit icon 1
    American Made

    Made in the USA in an FDA-regulated facility. Luma Nutrition adheres to Good Manufacturing Practices (GMPs).

  • Benefit icon 2
    Contains 4,000 FU of Nattokinase

    Other brands only provide 1,000 FU—or don’t disclose the amount at all. But our Nattokinase delivers a full 4,000 FU per serving, the clinically studied dose for effective cardiovascular support.

  • Benefit icon 3
    3rd Party Tested for Potency & Safety

    An independent lab tests all Luma Nutrition products to make sure they’re potent and free from harmful substances.

  • Benefit icon 4
    90 Day Return Policy

    Luma Nutrition offers a fair, 90-day, risk-free, money-back guarantee. If you don't like the product, simply return it for a refund.

  • Made in
    the USA
  • Contains 4,000 FU Of Nattokinase
  • 90 Day Money Back Guarantee
  • 3rd Party Tested For Safety

Pros

  • Contains quality ingredients
  • Positive verified reviews
  • Subscribe & Save options

Cons

  • Sometimes runs out of stock
  • Only available online
Overall

We ranked our Luma Nutrition’s Nattokinase at the top because it checks all the right boxes: potency, purity, and transparency.

Our formula delivers 4,000 FU per serving, sourced from high-quality natto and manufactured under strict U.S. standards.

If you’re looking for real support for heart health and circulation, this is the supplement we personally trust.

$34.99 $17.99 /Per Bottle
  • Sell Out Risk: High
  • FREE shipping
  • 90-Day Guarantee
*Scores and results are based on our ranking system and do no necessarily reflect typical results from the use of these products. Please visit product websites for more information.

2. NSK-SD

by Allergy Research Group

Product image
B+ Overall Grade *

Pros

  • Contains quality nattokinase
  • Positive reviews
  • Solid brand

Cons

  • Lacks proper dosage
  • Expensive

OVERALL

Number two on our list is NSK-SD by Allergy Research Group.

This is a well regarded brand, but the biggest problem is that it only contains 2,000 FU of nattokinase per serving.

The price is also quite high. Definitely a more expensive option.

Overall, NSK-SD by Allergy Research Group does use great ingredients, but fall short on the effective dose to the other products on this list.

*Scores and results are based on our ranking system and do not necessarily reflect typical results from the use of these products.Please visit product websites for more information.

*Scores and results are based on the our ranking system and do not necessarily reflect typical results from the use of these products.

Please visit product websites for more information.

View Product Details

3. XYMOGEN Nattokinase

by XYMOGEN

Product image
B Overall Grade *

Pros

  • Great quality
  • Contains pure nattokinase

Cons

  • Only 2,000 FU per serving
  • Very expensive option

OVERALL

Number three on our list is XYMOGEN Nattokinase.

Again, this is another brand with a very good reputation for quality. The issue with this product is that the dosage is a bit lower a tonly 2,000 FU per serving. They make it confusing on the label to make it seem like it contains 20,000 FU.

This one was also the more expensive products we analyzed.

Overall, XYMOGEN Nattokinase is not to bad,and could be an option if you are willing to spend top dollar. But it falls short when compared to other products on the list.

*Scores and results are based on the our ranking system and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.

*Scores and results are based on the our ranking system and do not necessarily reflect typical results from the use of these products.

Please visit product websites for more information.

View Product Details

4. NSK-SD Nattokinase

by Pure Encapsulations

Product image
B- Overall Grade *

Pros

  • Good brand reputation

Cons

  • Only contains 2,000 FU of nattokinase per serving

OVERALL

Number four on our list is Pure Encapsulations Nattokinase.

While a this brand does have a good reputation, the biggest problem is that the supplement only contains 2,000 FU of nattokinase per serving. And they charge avery high price.

In summary, Pure Encapsulations Nattokinase does use quality ingredients, butit ranks lower because of the less potent dosage and high price.

*Scores and results are based on the our ranking system and do not necessarily reflect typical results from the use of these products.Please visit product websites for more information.

*Scores and results are based on the our ranking system and do not necessarily reflect typical results from the use of these products.

Please visit product websites for more information.

View Product Details

5. Nattokinase Plus

by DAVINCI Labs

Product image
B- Overall Grade *

Pros

  • Good brand reputation

Cons

  • High price
  • Only 2,500 FU per serving, low dosage

OVERALL

Number five on our list is Nattokinase Plus by DAVINCI Labs.

This product is priced very high for only having 2,500 FU of nattokinase per serving, but it does appear to be good quality ingredients.

In conclusion, Nattokinase Plus by DAVINCILabs is a good choice based on quality, but we have to rank it lower based on the high price and lower dosage.

*Scores and results are based on our ranking system and do not necessarily reflect typical results from the use of these products.Please visit product websites for more information.

*Scores and results are based on the our ranking system and do not necessarily reflect typical results from the use of these products.

Please visit product websites for more information.

View Product Details

Top Rated Nattokinase

Our Nattokinase earns the top spot with a clinically effective dose of 4,000 FU per serving, the gold standard in cardiovascular support.It’s a pure, single-ingredient formula—no blends, no fluff.

Made in the USA and third-party tested, it reflects our highest standards for quality and safety.With a 90-day risk-free return policy, you can try it with complete confidence.

#1 Choice Product Image
Luma’s Nattokinase for Heart & Circulatory Support
  • 4,000 FU of pure Nattokinase per serving
  • Supports healthy blood flow and circulation
  • Helps maintain normal blood pressure and cardiovascular function
  • Non-GMO and free from unnecessary fillers or additives
  • Sell Out Risk: High
  • FREE shipping
  • 90-Day Guarantee
Banner Image Banner Image

What is Nattokinase?

What is this product?

Nattokinase is a naturally occurring enzyme extracted from natto, a traditional Japanese food made from fermented soybeans.It’s shown to support circulatory health by breaking down fibrin, a protein that contributes to blood clot formation.
By promoting better blood flow, nattokinase has been studied for its potential in supporting healthy blood pressure, reducing clot risk, and improving overall cardiovascular function.

Safe, natural, and widely researched, nattokinase offers an alternative way to care for your heart—without synthetic drugs or harsh side effects.

Citations

THIS IS AN ADVERTORIAL AND NOT AN ACTUAL NEWS ARTICLE, BLOG, OR CONSUMER PROTECTION UPDATE

This is an advertisement for Luma Nutrition and is intended for informational purposes only. All information provided by Luma Nutrition does not constitute medical advice and should not be used as a replacement for your doctor's advice. Please consult your doctor regarding any change in treatment or supplementation.

The views and opinions expressed are solely those of the Luma Nutrition or a testimonial from a verified Luma Nutrition customer based on his/her real-life experiences. Individual results may vary.

Please note that Luma Nutrition's products are not drugs and are not intended to treat, prevent, or cure any disease. The use of the logos are copyrighted by each respective entity and use of any particular logo may represent a publication, advertisement, or mention of Luma Nutrition on a local affiliate or regional carrier.

* These statements have not been approved by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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