Ultimate Nattokinase by Healthletic is a high-strength nattokinase capsule: 10,800 FU in 2 capsules a day, 60 servings per bottle according to the label, from $26.69 to $44.49 per bottle. That works out to well under a dollar a day.
I went through the official page, the Supplement Facts label, the published lab certificate, every price and the seller's written policies. Here is what you get, what it costs per day, and who should not take it.
A high, clearly printed dose of the enzyme from Japanese natto, a lab certificate you can read yourself and a low cost per day. Before you order, read our note on the guarantee and on blood thinners.
Made in USA · 3rd-party lab tested · 10,800 FU per serving
Choose one-time purchase or refills on the official page. You decide.
Made in USA
GMP FacilityThe short version
Ultimate Nattokinase is a dietary supplement with nattokinase, an enzyme from natto, the fermented soybean dish eaten in Japan for centuries. It is marketed to support healthy circulation and heart health. You take 2 capsules a day on an empty stomach, which gives 540 mg of nattokinase, listed as 10,800 FU of enzyme activity. The label lists 60 servings per bottle, so one bottle lasts two months.
Why people buy it instead of eating natto: natto has a strong smell and a sticky texture most people never get used to. A capsule gives you the enzyme without the taste, at a measured dose.
Is this you?
Most people look at nattokinase after something makes heart health feel personal:
If that is you, nattokinase is one of the most popular circulation supplements, and a capsule is the easiest way to take it. If you are already under treatment, the next sections matter: this enzyme affects blood clotting, so your doctor needs to know before you start.
The basics
A bottle of delayed-release vegetable capsules. Two capsules is one serving, taken once a day on an empty stomach, about 30 minutes before a meal.
| Ultimate Nattokinase | Typical nattokinase | |
|---|---|---|
| Dose per day | 10,800 FU (540 mg) | Often 2,000 to 4,000 FU |
| Capsules per day | 2 | 1 to 2 |
| Lab certificate | Published on the official site | Often not shown |
| Capsule | Delayed-release | Usually standard |
Adults who want daily support for healthy circulation and heart health, who are already working on diet and movement, and who do not take blood-thinning medication.
Inside the bottle
Here is the Supplement Facts panel as published on the official product page.
Per 2 capsules: Nattokinase 540 mg, which the brand lists as 10,800 FU. Other ingredients: microcrystalline cellulose (120 mg), fumed silica (10 mg) and magnesium stearate (10 mg), in a vegetable capsule. One active ingredient, with its dose printed. No proprietary blend.
An enzyme produced when soybeans are fermented with Bacillus subtilis natto. It breaks down fibrin, a protein involved in blood clotting, which is why it is studied for circulation and why it interacts with blood thinners.
FU (fibrinolytic units) measures the enzyme's activity, not its weight. It is the number to compare between brands. Many products sell 2,000 FU per capsule; this one lists 10,800 FU per daily serving.
A plant-based shell designed to pass the stomach before opening. Enzymes can be damaged by stomach acid, so this is a sensible choice for nattokinase.
Healthletic publishes a Certificate of Analysis from an independent US lab (Contract Testing Laboratories of America) for its nattokinase powder, testing heavy metals (arsenic, cadmium, mercury, lead) and enzyme activity. You can read it yourself:
Nattokinase has a long history as a food and a growing body of human studies on circulation markers, blood pressure in the normal-to-high range and arterial health. Results are mixed and studies are mostly small, and high doses such as 10,800 FU are the ones used in some of that research. The sales page goes much further, talking about "reversing" plaque and preventing clots: those are claims about diseases, and no supplement can be sold to treat them. Take it as daily support, not as treatment.
Daily routine
The balance sheet
The big question
It is a real product from a real online brand. Healthletic sells a line of supplements through its own store, publishes lab certificates and lists a US phone line and a business address in Casper, Wyoming.
The product page promises a "60-Day 100% Money-Back Guarantee": "If you don't feel a change in your arterial health within 60 days, we will refund you hassle free." The written Refund Policy on the same site, however, describes a full refund only when a product arrives damaged or broken, and says shipping fees are non-refundable.
Only through the official Healthletic site, where you know you are getting this exact formula and dose.
No surprises
Read this part
Nattokinase is generally well tolerated, and natto has been eaten in Japan for centuries. Because it acts on clotting, the main risk is bleeding in people who should not take it:
Do not take Ultimate Nattokinase if you take blood thinners or antiplatelet medication without your doctor's approval, have a bleeding disorder, have surgery planned within 2 weeks, or are pregnant or nursing. Talk to your doctor first if you take blood pressure medication or have any medical condition. Stop and seek medical help if you notice unusual bruising or bleeding.
People with a soy allergy should check with their doctor, since nattokinase comes from fermented soybeans. Ultimate Nattokinase is a dietary supplement: it is not intended to diagnose, treat, cure or prevent any disease.
What customers say
These are reviews shown on the official Healthletic product page, lightly shortened. We cannot verify them independently, and individual results vary.
"I'd been keeping an eye on my heart health for years and tried a lot of things. Six weeks into Ultimate Natto I felt noticeably better, with more energy. It's part of my daily routine now."
Robert, 62As shown on the official site
"My doctor and I agreed I'd focus on my heart health naturally first. I started Ultimate Natto, cleaned up my diet, and walked daily. Six months in, I feel genuinely good."
David K., 59As shown on the official site
"I have three grandkids and I want to see them grow up, so I take my health seriously. I feel steady, I sleep well, and I've got the energy to keep up with them."
Nate K., 76As shown on the official site
The real cost
Sold in three packages on the official site, as a one-time purchase or with a subscription:
| Package | Lasts | One-time total | Per bottle | Per day | Subscribe |
|---|---|---|---|---|---|
| 1 bottle | 60 days | $44.49 | $44.49 | $0.74 | $39.99 |
| Buy 2, get 1 free | 180 days | $88.98 | $29.66 | $0.49 | $79.98 |
| Buy 3, get 2 free · Best value | 300 days | $133.45 | $26.69 | $0.44 | $119.97 |
For a first try, Buy 2, get 1 free is the sweet spot: about six months of daily use for $88.98, under 50 cents a day. If you already know nattokinase suits you, Buy 3, get 2 free is the lowest price per day.
Up to 2 free bottles · One-time purchase available · Made in USA
Straight answers
Nattokinase has human studies on circulation markers and blood pressure, mostly small and with mixed results. This product gives a high, clearly labelled dose, 10,800 FU a day. It is daily support for heart health, not a treatment, and results vary.
It is a real product from an online supplement brand that publishes an independent lab certificate and a US contact line. The one thing to check is the guarantee: the sales page promises 60 days, while the written refund policy covers damaged products. Ask support to confirm it in writing before you order.
Each 2-capsule serving contains 540 mg of nattokinase, listed as 10,800 FU, plus microcrystalline cellulose, fumed silica and magnesium stearate in a vegetable capsule.
2 capsules once a day on an empty stomach, about 30 minutes before a meal, with water.
The label lists 60 servings of 2 capsules per bottle, so one bottle lasts about 60 days.
Not without your doctor's approval. Nattokinase acts on blood clotting and can add to the effect of warfarin, Eliquis, Xarelto, clopidogrel, aspirin and similar drugs, raising the risk of bleeding.
Yes. The brand itself says not to take it if you have surgery within 2 weeks. Tell your surgeon or dentist you take it.
Only if you choose it. The product page offers a one-time purchase or a subscription at about 10% off that bills until you cancel. Pick one-time if you just want to try it.
The sales page advertises a 60-day money-back guarantee. The written refund policy describes refunds for products that arrive damaged or broken and says shipping is non-refundable. Get the 60-day guarantee confirmed in writing by support before ordering.
It is easier: no smell or sticky texture, and a measured dose. Natto as food also brings vitamin K2, which capsules like this do not list.
Who wrote this
Supplement Research Editor, Global Review Network · Updated October 2026
Before I recommend anything, I do the homework most buyers don't have time for:
I write the way I'd talk to a friend: what I like, the catches up front, and who should check with a doctor first.
Overall 4.3/5 is the simple average of the five scores (21.7 ÷ 5).
Ultimate Nattokinase is a straightforward, high-dose nattokinase: one active ingredient, the dose printed on the label, a lab certificate you can read and a cost of under a dollar a day. For adults who want simple daily support for circulation and heart health, it is one of the easier products in this category to recommend.
Choose the one-time purchase, ask support to confirm the 60-day guarantee in writing, and skip it if you take blood thinners or have surgery coming up.
Official site only · Up to 2 free bottles · One-time purchase available
You pick your own package on their product page.