NF Nattokinase Arterial Support 5,000 FU Review
NF Supplements · Last updated 1 June 2026
Trust Checklist6/6 passed
3rd Party Batch Tested
Every batch tested by SORA Labs
Met or Exceeded Label Potency
5,210 FU vs 5,000 FU claim (104%)
Public Certificates of Analysis
Published at testing.nfsupplements.co.uk
GMP Certified
In-house GMP facility, Oxford
Made in the UK
Made in Kidlington, Oxford
Vitamin K2-Free (warfarin safe)
Independently verified K2-free
Rating Breakdown
Pros & Cons
Pros
- The ONLY brand to exceed its label claim — lab tested at 5,210 FU vs 5,000 FU claim (104% potency)
- Every production batch independently tested by SORA Labs with COAs published publicly
- Made in-house at their own GMP facility in Kidlington, Oxford — no white-labelling
- Independently verified vitamin K2-free (important if you're on blood thinners like warfarin)
- Single-capsule daily serving
- Also available in a higher-strength 10,000 FU option for those wanting a stronger dose
Cons
- More expensive than budget alternatives
- Direct-only and Amazon — not on the high street
- Smaller brand with less mainstream recognition
Product Details
- Form
- Capsule (Nattokinase enzyme)
- Dosage per Serving
- 5,000 FU nattokinase
- Potency
- 5,000 FU (tested 5,210)
- Serving Size
- 1 capsule
- Servings per Container
- 30
- Price
- £29.99
- Price per Serving
- £1.00
- Other Ingredients
- Capsule shell (HPMC)
- Certifications
- SORA Labs Batch Tested (COAs Public), Made in Oxford, UK, GMP Certified, Verified Vitamin K2-Free
Full Review
Ingredient Quality
Nattokinase is a fibrinolytic enzyme derived from fermented soybeans (natto), measured in Fibrinolytic Units (FU). Quality comes down to one thing above all: does the capsule actually contain the potency stated on the label? Most don't. NF Supplements is the standout — independent testing by SORA Labs measured 5,210 FU against a 5,000 FU label claim, or 104% of the stated potency. It was the only brand in the test to exceed its claim rather than fall short of it.
Every production batch is independently tested by SORA Labs, and the Certificates of Analysis are published publicly at testing.nfsupplements.co.uk — so you can verify the exact batch you're holding. The product is made in-house at NF Supplements' own GMP facility in Kidlington, Oxford, rather than being white-labelled from a third party.
Value Analysis
It's priced above the budget options, but the premium buys verified, over-delivered potency and batch-level transparency that none of the cheaper brands match. When several competitors deliver only 18–28% of their claimed FU (see the failed brands below), paying a little more for a product proven to contain 104% of its claim is genuinely better value per active unit.
Effectiveness
Nattokinase is studied for cardiovascular and circulatory support. Effectiveness depends entirely on receiving a genuine, active enzyme dose — a meaningless number on a label that the capsule doesn't contain helps no one. With verified 5,210 FU per serving, NF delivers a real, research-relevant dose. It's also independently verified to be free of vitamin K2, which matters because K2 can counteract blood-thinning medication like warfarin.
Who Is This Best For?
Anyone who wants nattokinase that is independently proven to contain what it claims — especially people taking it for cardiovascular support, and those on blood thinners who need a verified K2-free formula. If verified potency and batch transparency matter to you, this is the clear choice.
Where to Buy
Prices are approximate and may vary. As an affiliate, we may earn a commission from qualifying purchases at no extra cost to you. This does not influence our reviews or rankings of NF Nattokinase Arterial Support 5,000 FU.
NF Nattokinase Arterial Support 5,000 FU FAQ
Why does potency matter so much for nattokinase?
Nattokinase is a delicate enzyme measured in Fibrinolytic Units (FU). It can degrade in manufacturing and storage, so many products contain far less active enzyme than their label claims — some as little as 18%. NF was independently tested at 5,210 FU against a 5,000 FU claim (104%), the only brand in the test to exceed its label.
Is NF Nattokinase safe with blood thinners?
NF Nattokinase is independently verified to be vitamin K2-free, which is important because K2 can counteract anticoagulant medication like warfarin. However, nattokinase itself has blood-thinning properties, so always consult your GP before combining it with prescription blood thinners.
Where can I see the lab test results?
NF publishes Certificates of Analysis for every production batch at testing.nfsupplements.co.uk, so you can verify the exact potency of the batch you have. This batch-level transparency is rare in the nattokinase market.
Does NF Nattokinase come in a stronger dose?
Yes — alongside the 5,000 FU Arterial Support, NF Supplements offers a higher-strength 10,000 FU option for those who want a stronger daily dose. Both are made to the same standard and independently batch tested.