The UK's most rigorously tested Nattokinase. 5,000 FU per capsule. Manufactured in-house in our GMP-certified UK facility. Every batch tested by ISO/IEC 17025 accredited labs.
Select Your Offer (30 capsules per bottle)
3 bottles · 90-day supply · Free UK shipping · 90-day money-back guarantee
Real customers. Real results. Independently verified reviews.
Just one capsule of 5,000 FU Nattokinase a day works on three fronts to support a cleaner, healthier cardiovascular system.
Nattokinase is one of the few orally-active fibrinolytic enzymes — it goes to work on the sticky fibrin proteins behind dangerous blood clots.
Emerging research from the Journal of the American College of Cardiology shows daily Nattokinase use is associated with reduced carotid artery plaque thickness.
With fewer obstructions, blood flows more freely — supporting healthy pressure, oxygen delivery, energy, and recovery. Customers feel it within 30 days.
In 2025, our team tested 8 leading UK Nattokinase brands at SORA Laboratories. 6 of 8 failed the standard GM0068 enzyme assay — meaning the capsules contained nowhere near the FU printed on the label.
The average Japanese person lives to 84.4 years. The average Briton? 80.9 years. That's around three and a half extra years of life — and the gap isn't shrinking.
Even more striking: Britons die of cardiovascular disease at around 1.5× the rate of the Japanese. Same heart. Same biology. Very different outcomes.
So what does Japan eat that we don't? Natto — a traditional fermented-soybean breakfast staple consumed daily by tens of millions of Japanese for over 1,000 years. It's where Dr. Hiroyuki Sumi isolated Nattokinase in 1980 — the powerful fibrinolytic enzyme behind every capsule of NF.
Sources: ONS / UN Population Division (2024); Global Burden of Disease, age-standardised CVD mortality per 100,000 (Japan 77 · UK 113).
One capsule a day. Three measurable effects. Here's exactly what 5,000 FU of Nattokinase does inside your cardiovascular system.
Once absorbed into the bloodstream, Nattokinase's powerful fibrinolytic enzymes go to work on the sticky fibrin proteins that thicken blood and form the scaffolding behind clots and arterial buildup.
As fibrin breaks down, the structural framework that holds plaque and traps LDL cholesterol comes apart with it — supporting cleaner artery walls and reducing the conditions that allow dangerous blood clots to form.
Cleaner, more flexible arteries mean lower blood pressure, better oxygen delivery, and a meaningfully reduced cardiovascular risk profile — for years to come.
Nattokinase is one of the most-studied natural compounds in cardiovascular medicine — with over 40 published human clinical trials. Here are three of the most compelling.
In a 12-month trial of 1,062 men & women (average age 68), daily Nattokinase at 10,800 FU/day was shown to significantly reduce carotid artery plaque, alongside improvements in total cholesterol (95.4% of patients), LDL (84.3%), HDL (89.1%) and triglycerides (85.2%).
View study (DOI: 10.3389/fcvm.2022.964977) →A landmark observational study of 29,079 Japanese adults tracked over 16 years found that those who ate the most natto had a 25% lower risk of cardiovascular death and a 33% lower risk of dying from ischemic stroke.
View study (DOI: 10.3945/ajcn.116.137281) →After just 2 months of daily Nattokinase, three of the key proteins that drive clot formation — fibrinogen, factor VII, and factor VIII — dropped significantly across healthy adults, cardiovascular-risk patients, and dialysis patients alike.
View study (DOI: 10.1016/j.nutres.2009.01.009) →All studies above are publicly indexed and accessible via DOI. NF Nattokinase contains 5,000 FU per capsule — within the clinically-studied dose range. Individual results vary.
Lower cholesterol. Cleaner arteries. Better energy. Sharper thinking. Here's everything daily 5,000 FU Nattokinase has been shown to support — both directly in clinical trials, and indirectly through the cascade of better blood flow.
Plaque, reduced
In a 12-month trial of 1,062 men & women (avg. age 68), daily Nattokinase was shown to reduce carotid artery plaque by up to 36% — alongside significant improvements in total cholesterol, LDL, HDL and triglycerides.
Frontiers in Cardiovascular Medicine, 2022
The clinically-studied dose. Nothing complicated.
Take with a glass of water in the morning, on an empty stomach 30 minutes before food. Most customers feel the difference within 30 days of consistent daily use.
Important: If you take blood thinners (Warfarin, Eliquis, aspirin), are pregnant, or are scheduled for surgery within 14 days — speak with your doctor before starting.
SHORT
SHORT
SHORT
SHORT
SHORT
SHORT
SHORT
SHORT
Now non-hypertensive. I have been using the supplement for 33 days. My doctor has just confirmed I am now non-hypertensive.
It works. Down from 145/94 to 125/82 on average.
I can genuinely feel the benefits. At 59 years old I had growing concerns about my arterial health. I am only three weeks in and my breathing is better, I'm feeling more awake and I cannot recommend Nattokinase enough!
Incredibly impressed by the results. My blood pressure was on average 155/95 and my latest reading was 119/75. I found Natural Foundation and I have to say I'm incredibly impressed.
A customer for about 4 months. My blood pressure has come right down so I will keep taking it.
Recommend to all my patients. Been on Nattokinase for several months. I like it and recommend to all my patients and family. I am a physician in practice.
BP is definitely sorting itself out. Started taking the tablets about 3 weeks ago and my blood pressure is definitely sorting itself out — steady and a lot lower which is a big relief.
Outstanding. I've noticed a change in my circulation. It feels a lot different for the better.
Whether your goal is preventative, performance, or post-event recovery — here's who NF Nattokinase is designed for.
Your last reading was higher than you'd like and you want to take action before the prescription pad comes out.
Heart attacks or strokes run in your family. You'd rather invest in prevention than play catch-up.
You've read the emerging research on circulation after illness and want a clean way to support healthy blood flow.
You train hard and want to recover faster. Healthy circulation = more oxygen to working muscles.
Long-haul flights and sedentary days take a toll. Daily support keeps your circulation moving even when you can't.
You're in your 40s, 50s or 60s and want one daily ritual that pays off for the next 30 years. This is it.
We've spent four years and over £1M building NF Supplements around one principle: radical transparency. That's why our guarantee is the most generous in the industry.
If you have a question we haven't answered, our team is one email away at help@naturalfsupplements.co.uk.
121,023+ people across the UK have made the switch. Join them — risk-free for 90 days.
🔒 Secure checkout · 90-day money-back guarantee · Free UK shipping
