Clinical-Grade 10,800 FU Nattokinase
Clinical-Grade 10,800 FU Nattokinase
Clinical-Grade 10,800 FU Nattokinase
Clinical-Grade 10,800 FU Nattokinase
Clinical-Grade 10,800 FU Nattokinase
Research Backed Dosage
Reduction In Arterial Plaque
Reduction In Arterial Plaque
3rd Party Lab Tested
3rd Party Lab Tested
Clinical-Grade 10,800 FU Nattokinase
Clinical-Grade 10,800 FU Nattokinase
Clinical-Grade 10,800 FU Nattokinase
Clinical-Grade 10,800 FU Nattokinase
Clinical-Grade 10,800 FU Nattokinase

4.9/5

(1,422+ reviews)

Clinical-grade 10,800 FU Nattokinase

30 Capsules / 10,800 FU Each
  • Proven 36.6% Arterial Plaque Reduction
  • Support Healthy Blood Flow & Arterial Function
  • 6x More Potent Than Your Body's Natural Enzymes
  • Clinical-Grade 10,800 FU Dose
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  • Improved Sleep
  • Reduced Stress
  • Enhanced Focus
  • Better Mood
  • Increased Energy

What the Research Shows About Nattokinase

A peer-reviewed 12-month study followed over 1,000 participants taking 10,800 FU of nattokinase. The results showed meaningful improvements across key cardiovascular markers
39%

Coronary plaque score improvement

measured by coronary plaque score
25%

Carotid artery wall thickness improvement

measured by CCA-IMT
17%

Total cholesterol decrease

16%

Triglyceride level decrease

The 90-Day protocol

Month 1

Early Cardiovascular Support

During the first few weeks of daily use, nattokinase begins working to support healthy blood flow and fibrin metabolism. Some users notice warmer hands and feet and a gradual lift in everyday energy as circulation improves.

After 2 Months

Building on Consistency

Published research suggests nattokinase may support healthy blood pressure levels within 8 weeks of consistent use. With continued daily supplementation, the enzyme works alongside your body's natural cardiovascular processes.

After 3 Months

Sustained Cardiovascular Wellness

By the 3-month mark, many users report a noticeable difference in how they feel day to day. Research on nattokinase at this timeframe has shown continued support for healthy blood pressure and balanced clotting factors.

6 Months And Beyond

Long-Term Circulatory Health

Ongoing daily use supports arterial health, healthy blood pressure, and overall cardiovascular function. This is why we recommend making nattokinase part of your long-term wellness routine.

Rated 4.8/5 based on +10,839 Total Ratings

See what our customers are saying

Review by Michael
Michael, 68 Verified Buyer
Been tracking my blood pressure at home for years and it was always hovering around 145/92 even on meds. My calcium score from last year was 287 which my cardiologist said was "moderate" but concerning. Started taking this in January and by March my home readings were consistently in the 118/66 range. Just got my labs done and my doctor actually commented that my numbers looked better. Can't get another calcium scan until next year but if my BP improvement is any indication, something's working.
Review by Robert T.
Robert T., 52 Verified Buyer
My legs felt so heavy by afternoon I could barely walk my dog. Stairs were brutal. Doctor mentioned arterial stiffness but just wanted to add another pill. Tried this instead and within a month the heavy feeling started going away. Now at 3 months I'm walking the dog twice a day no problem. Even my blood pressure came down. Really glad I found this.
Review by Sarah
Sarah, 58 Verified Buyer
My feet have been freezing for years. Like ice blocks even with thick socks. Doctor said just circulation from getting older. Been taking this for about 2 months and honestly my feet feel warm again. I can't believe it. Such a simple thing but when you've had cold feet for 5 years it's huge. Sleeping better too

Clinically Studied Benefits of Nattokinase

Supports Healthy Blood Flow & Circulation

Supports Healthy Blood Flow & Circulation

Nattokinase is a fibrinolytic enzyme studied for its ability to break down excess fibrin — a protein that can accumulate in blood vessels and contribute to restricted circulation.

Helps Maintain Healthy Blood Pressure

Helps Maintain Healthy Blood Pressure

Clinical research suggests nattokinase supports vascular relaxation and healthy blood viscosity, helping maintain normal blood pressure already within a healthy range.

Warmth in Hands and Feet

Warmth in Hands and Feet

By supporting smoother peripheral circulation, nattokinase helps improve oxygen delivery to extremities often affected by sluggish blood flow.

Mental Clarity & Sharpness

Mental Clarity & Sharpness

Healthy cerebral circulation is essential for brain performance. Nattokinase supports efficient blood flow to help maintain focus, memory, and mental sharpness.

Clinical-Grade 10,800 FU Nattokinase
Excellent 4.7

Clinical-Grade 10,800 FU Nattokinase

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The Truth About Heart Disease

Heart disease can often start with endothelial damage—the breakdown of the thin lining inside our blood vessels. This damage can often be driven by metabolic dysfunction, oxidative stress, and chronic inflammation from poor diets, sedentary habits, environmental factors and more.*

Kiva supports a healthy endothelial lining by promoting clear, efficient blood flow—delivering vital nutrients to your heart and organs, and helping your body remove metabolic waste for sustained vitality.

Image with text

Introducing ancient Nattokinase

Nattokinase is an enzyme derived from natto, a fermented soybean dish, which has been a staple in Japan for over a thousand years.While cardiovascular disease is the leading cause of death in most developed nations, Japan and South Korea stand out with lower rates. Their diets, rich in fermented foods like natto and kimchi, may contribute to better heart health by improving blood flow and reducing clot formation​.Discovered in the 1980s by Dr. Hiroyuki Sumi for its potent ability to break down blood clots, it works by targeting fibrin—the key protein involved in clot formation.

"Best Natto I ever had"

My feet aren’t ice blocks anymore

I used to joke that my feet were permanently frozen. Even in bed with socks and a blanket they felt cold from the inside out. After about two months on this, I realized I wasn’t layering socks at night anymore. It’s such a small thing, but it’s honestly made winters way more comfortable. I didn’t expect to actually feel a difference like this.

L
Linda M. Verified customer

I tried nattokinase before and felt nothing

I bought a cheaper nattokinase supplement a few years ago and gave up because nothing changed. This time has been different. Around week 8–9 my legs didn’t feel as heavy when walking uphill, and I wasn’t crashing mid-afternoon like before. The higher dose clearly makes a difference.

R
Robert K. Verified customer

Worth It!

I originally bought this for heart health, but the biggest change has been mental clarity. I was starting to feel slower when speaking and would lose my train of thought more often. After a couple months, I feel sharper and more “on.” My husband even noticed before I mentioned it.

J
James M. Verified customer

Taste Amazing

I’ve tried a few brands, but most are too bitter or processed. This Natto has a refined, woody flavor with a hint of sweet

L
Liam B. Verified customer

10,800 FU vs. market dosing

Most nattokinase supplements provide small “maintenance” amounts that is only placebo. Kiva delivers the full 10,800 FU clinical-level dose used in research the level associated with meaningful support for healthy circulation, blood flow, and vascular function.

10,800 FU vs. market dosing

Most nattokinase supplements provide small “maintenance” amounts that is only placebo. Kiva delivers the full 10,800 FU clinical-level dose used in research the level associated with meaningful support for healthy circulation, blood flow, and vascular function.

Kiva
others
Increase Blood Flow
Antioxidant Powerhouse
Clears Artery Plaque
Supports Focus
Boosts Energy
No Heavy Metals

90-day satisfaction Guaranteed

We're so confident in the quality of our product that we offer a satisfaction guarantee. If you're not completely satisfied with your purchase, simply return the item within 90 days for a full refund.

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100% Satisfaction
Fast Shipping
Easy Returns

90-day satisfaction Guaranteed

We're so confident in the quality of our product that we offer a satisfaction guarantee. If you're not completely satisfied with your purchase, simply return the item within 90 days for a full refund.

TRY IT NOW RISK FREE
100% Satisfaction
Fast Shipping
Easy Returns

Frequently Asked Questions

We offer a 90-day money back guarantee.

What makes 10,800 FU different from other nattokinase supplements? +

Most nattokinase supplements contain 2,000 FU. The 10,800 FU dose is based on published research where lower doses (3,600 FU/day) showed less effect on cardiovascular markers. We chose this dose to align with the research

what exactly is nattokinase? +

Nattokinase is a fibrinolytic enzyme that supports the breakdown of fibrin. It works differently from pharmaceutical blood thinners like warfarin (which inhibits clotting factors) or aspirin (which affects platelets). It’s a supplement, not a medication replacement. Consult your doctor if you’re on blood thinners.

When should I take it? +

Most customers take one capsule in the morning with their first drink of the day.

How long until I notice results? +

Individual experiences vary. Most research studies nattokinase over 8–12 weeks. We recommend 90 days of consistent use." For side effects: "Nattokinase may affect blood clotting. Avoid if on blood thinners, before surgery, or if pregnant. Consult your doctor.

Can I take this with other supplements? +

Nattokinase is commonly taken alongside other wellness supplements. If you are taking prescription medication or blood thinners, consult your healthcare professional before use.

Is it safe for long-term use? +

Nattokinase has been consumed for decades as part of traditional diets and is widely used as a daily wellness supplement.

what exactly is nattokinase? +

Nattokinase is a fibrinolytic enzyme that supports the breakdown of fibrin. It works differently from pharmaceutical blood thinners like warfarin (which inhibits clotting factors) or aspirin (which affects platelets). It’s a supplement, not a medication replacement. Consult your doctor if you’re on blood thinners.

How long until I notice results? +

Individual experiences vary. Most research studies nattokinase over 8–12 weeks. We recommend 90 days of consistent use." For side effects: "Nattokinase may affect blood clotting. Avoid if on blood thinners, before surgery, or if pregnant. Consult your doctor.

Is it safe for long-term use? +

Nattokinase has been consumed for decades as part of traditional diets and is widely used as a daily wellness supplement.