Man holding a bottle of Fortalyn Nattokinase 10,000 FU
★★★★★ Rated 4.8 · 12,000+ men

Normal labs.
Still not yourself? Check the pipes.

Performance runs on blood flow through some of the narrowest arteries in your body. Fortalyn delivers the full 10,000 FU of nattokinase, the dose the research used, in one daily capsule.†

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Healthy Blood Flow† Male Vitality† 10,000 FU Studied Dose Heart & Circulation† Fibrin Breakdown Support† One Capsule a DayHealthy Blood Flow† Male Vitality† 10,000 FU Studied Dose Heart & Circulation† Fibrin Breakdown Support† One Capsule a DayHealthy Blood Flow† Male Vitality† 10,000 FU Studied Dose Heart & Circulation† Fibrin Breakdown Support† One Capsule a DayHealthy Blood Flow† Male Vitality† 10,000 FU Studied Dose Heart & Circulation† Fibrin Breakdown Support† One Capsule a Day
Fortalyn bottle on a breakfast table Man taking his daily capsule Fermented natto soybeans Three bottles of Fortalyn The 7 natural actives in Fortalyn
Fortalyn Nattokinase 10,000 FU
Our flagship formula

Fortalyn Nattokinase 10,000 FU

The full studied dose of nattokinase, plus CoQ10, bromelain, turmeric, aged garlic, pine bark and grape seed. One capsule a day for healthy blood flow where it matters most.†

$39.99$49.99 Save 20%
  • Healthy blood flow & male vitality†
  • 10,000 FU, the dose the research used
  • One capsule a day · 90-day money-back
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“173 foods were tested on an artificial clot. Only one dissolved it: Japan's fermented soybean breakfast.”
— The 1980 discovery of nattokinase by Dr. Hiroyuki Sumi

Your blood panel forgot something.

Most men go in because something that used to be automatic isn't anymore. Testosterone gets checked, it comes back normal, and the conversation ends.

But performance is a blood-flow event, and the arteries that drive it are only 1 to 2 mm wide. They feel narrowing first, often years before anything else does.

For a thousand years, Japan ate a fibrin-clearing enzyme for breakfast without knowing it. Fortalyn brings it back at the dose the research used.†

See the science
★★★★★

"Labs normal. Now I feel normal too."

Ten weeks in, things are a lot more reliable. My wife noticed.*

— James R.
★★★★★

"The first nattokinase I actually felt."

Three brands at under 2,000 FU did nothing. This one is the full dose.*

— Frank D.
★★★★★

"Mornings are back."

I'm 58 and hadn't woken up like that in a long time.*

— Tom H.
★★★★★

"Same arteries, same care."

Looking after my circulation, not just one symptom. Easier stairs too.*

— Michael T.

The Studied Dose.
Real Results.†

When a thousand-year-old Japanese food meets modern enzyme research, men feel the difference.

Try Fortalyn Risk-Free ✓ 90-day money-back guarantee

Is Fortalyn right for you?

★★★★★

Real People, Real Results

Here's what men taking Fortalyn every morning are telling us.

5.0 ★★★★★

"Labs normal. Now I feel normal too."

My testosterone came back fine and I was told that was that. Reading about the artery side of things finally made sense. Ten weeks on Fortalyn and things are a lot more reliable. My wife noticed.*

JJames R.
PerformanceConfidence
5.0 ★★★★★

"I wish I'd known this at 50."

I spent two years thinking it was age. It's blood flow. A month in, mornings felt like they used to, and my hands and feet aren't cold anymore either.*

RRon K.
Blood flowMornings
5.0 ★★★★★

"The first nattokinase I actually felt."

I'd tried three brands before and noticed nothing. Turns out they were all far below the studied dose. This is the first one at 10,000 FU, and the first that did something for me.*

FFrank D.
Real doseFinally noticeable
5.0 ★★★★★

"Doing something for my heart too."

What sold me is that it's the same arteries. I'm not just fixing one thing, I'm looking after my circulation overall. Easier stairs, more energy, and the bedroom is better than it's been in years.*

MMichael T.
Heart & circulationEnergy

Frequently Asked Questions

Why nattokinase?

Because it's one of the few natural compounds that helps your body break down fibrin, the protein mesh that thickens blood and gives buildup something to grip. It comes from natto, a fermented soybean food Japan has eaten for over a thousand years.†

Why 10,000 FU?

That's the high dose used in the research. Below roughly 6,000 FU, studies found little to no effect, yet most bottles on the shelf contain under 2,000 FU.

My testosterone is normal. Why would this help?

Performance is mainly a blood-flow event, and the arteries involved are only 1 to 2 mm wide. A hormone panel doesn't measure flow at all. Fortalyn supports the circulation side.†

Can I take it with medication?

Ask your doctor first, especially if you take blood thinners, daily aspirin, ED medication or blood-pressure medication. Never stop or change a prescription on your own.

What if it's not for me?

Every order is covered by our 90-day money-back guarantee. You can return your bottles within 90 days of delivery. Just email us first and we'll send you the return instructions.