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Nattokinase Product Buyer’s Guide (updated May 2025)

Approved Science Nattokinase Review

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Our research has shown that this manufacturer creates products born from science and clinical data. We found that this top-quality formula provides nattokinase in the optimal dosage of 4000 FU, split between 2 capsules. It is one of the only products to have proper certifications and provide a 60-day money-back guarantee.  

Why do we recommend Approved Science Nattokinase?

Main Benefits:

  • Provides the clinically studied dosage of 4000 FU.
  • Splits the daily dosage into 2 capsules for dosage flexibility.
  • Free of vitamin K2 to ensure efficacy.
  • Contains BioPerine® to enhance absorption.
  • Made in a FDA-approved facility.
  • GMP-certified
  • 60-day money-back guarantee.
  • Good customer service.
  • Affordable price.
  • Discounted price when buying more than a 1-month supply.

Performance

Approved Science Nattokinase delivers all the much-praised health benefits of nattokinase but in a more bioavailable and efficient way. Any health benefits you have come to expect from natto are multiplied with this nattokinase supplement. While natto naturally contains vitamin K2, this vitamin can actually be counterproductive to the desired effects of nattokinase. Therefore, Approved Science Nattokinase is made with no vitamin K2. Furthermore, the product contains BioPerine® which is a bioavailability enhancer that is intended to improve the absorption of this supplement and maximize results. 

In regards to potency, this product provides the ideal strength of 4000 FU (fibrin units). The dosage is split into 2 capsules which is ideal because it means that they can be taken at intervals in order to maintain nattokinase levels in the body. Additionally, this enables individuals with a lower dosage need to still be able to choose this product and take only 1 capsule per day. Both 2000 FU and 4000 FU dosages of nattokinase have been studied and found to produce positive effects on cardiovascular health. A doctor can advise you on which dosage is right for you.

We were pleased to note that the reviews for this product indicate a product that works effectively. Customer reviews provide great insight into how a product really works. Many supplements will seem to present a great formula, but their capsules are all fillers and don’t contain what the labels say they should. When the reviews are positive, it implies that the active ingredients are actually inside the pills. Additionally, Approved Science manufactures their products in accordance with the current Good Manufacturing Practices (cGMP) and has their products third-party tested, so we’re confident that the capsules contain what the label says.

What we really like is that this nattokinase supplement is made by a company that consistently uses clinical studies as a benchmark for the dosage of all their health supplements. There are so many products out there that do not fall within the realm of high standards, offering artificial alternatives and all sorts of extras inside their formulas. It is a relief to be able to recommend a company that manufactures such a well-researched product.There is also a money-back guarantee which can be claimed by speaking to their customer service agents who are real people, and not AI! 

To summarize, Approved Science Nattokinase Supplement uses top-quality natural ingredients, provides awesome results, has a caring customer support team and comes at a great price. From what we saw, without a doubt, this is an extremely good product.

Quality Assurance

We were very happy to discover that Approved Science Nattokinase is manufactured in an FDA-registered facility. Moreover, it is cGMP recognized and complies with the US Pharmacopeia’s standards for quality and purity. This suggests that Approved Science takes what it does very seriously, and strives to keep its products safe, natural, and effective – a mentality that we totally appreciate.

Value

Approved Science Nattokinase comes at an affordable price with some excellent multiple purchase deals, allowing you to save big. Rather than offering a subscription and auto-ship program (which often works out better for the company than the consumer), Approved Science allows you to buy several bottles at once for a discounted price, allowing you to maintain control over your ordering and spending. This policy further supports the evidence that Approved Science is a top quality company.

Orders are shipped within 24 hours, with the exclusion of any orders placed on weekends and holidays. They are wrapped and sent in discreet packaging, with no identifying marks on the outside, unlike other companies who often have embarrassing slogans or logos. Furthermore, this company provides a 60-day risk-free money-back guarantee. If you are not 100% happy with the results, you can return the product (opened and unopened bottles) and receive a full refund. That shows the company’s strong confidence in its products and we totally support that kind of guarantee.

In Conclusion

Of all the products that we reviewed, across all parameters, none compared to Approved Science Nattokinase. This product complies with the high standards of the US Pharmacopeia, undergoes third-party testing, and is backed by comprehensive customer reviews that give us a great indication of how the product really works. If you are looking for a top-quality formula backed by research and scientific data that is an effective solution to improving cardiovascular health, you would be hard pressed to find anything better than Approved Science Nattokinase.

 
 
Approved Science Nattokinase
Allergy Research Group Nattokinase
Ortho Molecular Nattokinase
Xymogen Nattokinase
2000 FU nattokinase per capsule
States it is free of vitamin K2
x
x
Includes a bioavailability enhancer
x
x
x
Under $50 per month at 4000 FU a day
x
x
Vegan-friendly
x
x
GMP-certified
Made in the USA
x
60-day money-back guarantee
x

FAQs about Approved Science Nattokinase:

How does Approved Science Nattokinase work?

Approved Science Nattokinase provides nattokinase, a natural enzyme that has various effects on the blood and the cardiovascular system. Nattokinase has the ability to break down fibrin, which is a protein that forms blood clots and plaque in the arteries. Its effects are beneficial for overall cardiovascular health, including helping to lower blood pressure.

This product provides the clinically studied dosage of 4000 FU split between 2 capsules. It contains no vitamin K2 which is naturally found in natto and can interfere with the effects of nattokinase. Additionally, BioPerine® is included to enhance absorption for better results. 

Do all nattokinase supplements work?

No, they do not. There are many companies that just ride the trends, producing inferior products with weak formulas in the wrong proportions. For example, some nattokinase supplements will not have the vitamin K2 removed, which can reduce the effects of using the product. Therefore, it is important to choose a top-quality product such as Approved Science Nattokinase.

What should I look for in an effective nattokinase supplement?

  • It should provide 4000 FU nattokinase per daily serving, split into 2 capsules to provide flexibility.
  • It should not contain vitamin K2 which can interfere with its efficacy.
  • It should contain a bioavailability enhancer to optimize results.
  • It should not contain any harmful additives or preservatives.
  • It should be formulated in a certified lab and in accordance with the GMP guidelines.

Are there any side effects noted when using this product?

Nattokinase is often taken as a blood thinner, which can increase the risk of bruising or bleeding. Additionally, nattokinase may lower blood pressure, which some people will see  as the desired result and some may perceive as a side effect. Nattokinase may also cause allergic reactions in individuals who are allergic to soy. As with any supplement, we recommend consulting with a doctor, especially if you are pregnant, breastfeeding, have an existing medical condition, or are taking regular medication.

What are the dosage instructions for Approved Science Nattokinase?

The manufacturers of this product suggest taking 1 capsule, twice a day per day, before meals.

As with any supplement, always follow the recommended dosage or your doctor’s instructions, and do not exceed them as this poses health risks.

How long before I can see any results?

The time it takes to see results will vary depending on why you are taking nattokinase. Some consumers experience positive effects within the first month, while for others it can take 2 months or more. Results will also be impacted by other factors such as your diet, lifestyle, and genetic disposition. With Approved Science, you have a 60-day timeframe in which you can return the product for your money back in the event that you do not experience results within that time frame. 

What price should I expect to pay?

The cost of Approved Science Nattokinase varies depending on how many bottles you buy at a time. A 1-month supply is around $50, but you can buy a 3 or 6 month package for a discounted price per bottle so that you can pay as little as $23 per month. Considering that it can take some time to see the results of a nattokinase supplement, we recommend choosing the 3 month package; this way you can give the product a real chance and save money in the process, plus there’s a 60-day satisfaction guarantee so you don’t have to worry about buying for more than the first month.

Which nattokinase supplement should I buy?

As each person’s experience of a product is different, it is difficult to say specifically which one is the best. That said, based on several factors, we did like Approved Science Nattokinase the most. We found that, from the 50+ products that we looked at, Approved Science Nattokinase had the best quality of ingredients, potency and strength, positive consumer feedback, and excellent customer service.

How safe is it to order over the internet?

Ordering from Approved Science is safe to do over the internet. The manufacturer utilizes the latest encryption software to protect your credit card information and does not engage in shady schemes such as ‘automatic billing’ programs like many other companies do. They also deliver very efficiently and quickly, using discreet packaging.

Why should I choose Approved Science Nattokinase?

There are several reasons why we liked this product including effectiveness, purity of ingredients, customer service, and consumer satisfaction. Its formula is backed by clinical studies and we feel it values consumers’ health above and beyond the profit margins.

Approved Science Nattokinase  is a great product that you can depend on. It has a well-researched formula with the right ingredients in the correct potency. We will summarize the key benefits one more time:

  • Provides the clinically studied dosage of 4000 FU.
  • Splits the daily dosage into 2 capsules for dosage flexibility.
  • Free of vitamin K2 to ensure efficacy.
  • Contains BioPerine® to enhance absorption.
  • Made in a FDA-approved facility.
  • GMP-certified.
  • 60-day money back guarantee.
  • Good customer service.
  • Affordable price.
  • Discounted price when buying more than a 1-month supply.

The Bottom Line

We like Approved Science Nattokinase because we feel that this company is different. It is in it for the long haul. It has researched its ingredients well and produced its formula using ingredients with a lot of clinical data to back them up. Approved Science offers what more companies should – an effective, affordable product supported by a real concern for the health of its customers. As an added bonus, Approved Science Nattokinase has many happy testimonials to support our belief that this is a great product and a great company.   

What You’ll Discover:

Which nattokinase supplement is the BEST BUY and comes with a great GUARANTEE!
Which formula and ingredients are the most EFFECTIVE and work the fastest?
How NOT to get ripped off! BE AWARE of poor quality and cheap products.

Top 6 Items to Consider:

  1. Ingredients
  2. Cost Per Serving
  3. Product’s Testing Results
  4. Company’s Reputation
  5. Consumer Reviews
  6. Return Policy & Satisfaction Guarantee

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