Rated 4.9 Excellent 150,312+ Reviews

Aviora CardioFlow Nattokinase + K2

Clinical-strength nattokinase, paired with K2 — full-dose circulation support in one softgel.

check_circle 10,800 FU Nattokinase

check_circle Full-Dose K2 (MK-7)

check_circle Third-Party Tested

check_circle No Serving-Size Games

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Trusted by 100K+ customers

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Refills every 4 weeks at $39.99/ea
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What Customers Report With Daily Nattokinase and K2 Use

We built CardioFlow because we were tired of watching the category get away with diluted doses and vague labels. Customers who add it to their routine finally get both actives at the strength research actually calls for — no splitting softgels, no guessing, no second bottle for K2. This is what nattokinase was supposed to be all along.

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verified

3rd Party Lab Tested

0%

Lower Stroke Death Risk

0%

Lower Cardiovascular Death Risk

0%

Reduction in Arterial Plaque

0%

Showed Improved Artery Thickness

Proven Benefits. Backed by Science.

From full-strength dosing to lab-verified purity, each layer plays a distinct role

Full-Dose Nattokinase

10,800 FU per softgel

We didn't cut corners here. This is the full research-level dose of a high-potency enzyme sourced from fermented soybean — not the diluted 2,000–4,000 FU version that lets most brands print a number and hope you don't do the math.

Full-Dose K2

MK-7 per serving

We paired nattokinase with a real, full dose of Vitamin K2 — researched for its own role in healthy calcium metabolism and normal vascular flexibility. Most brands skip it entirely or sprinkle in a token amount. We didn't.

Enhanced Absorption

Delayed-release capsule technology

A dose on a label means nothing if it never survives your stomach. Our delayed-release shell protects both actives from stomach acid, so what you take is what actually reaches your bloodstream.

Third-Party Verified

Independently tested for potency & purity

Every batch is independently lab-tested for identity, potency, and purity — results are published, not just claimed

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

eco 10,000 FU Per Capsule

labs Third-Party Verified

gastroenterology Heart Control

  1. check_circle

    WEEKS 1–2

    Easy Start

    ✔ Simple routine with 2 capsules daily
    ✔ No splitting doses or tracking capsule counts
    ✔ Your body begins adjusting to full-strength nattokinase
    ✔ Consistency starts to feel natural

  2. check_circle

    WEEK 3-4

    Building The Habit

    ✔ Daily dose becomes part of your routine
    ✔ Some report steadier energy through the day
    ✔ No missed doses, no serving-size guesswork
    ✔ Full potency, every single day

  3. check_circle

    WEEK 5-8

    Noticeable Consistency

    ✔ Circulation support continues building
    ✔ Energy feels more consistent day to day
    ✔ Confidence in hitting the full dose, daily
    ✔ Routine feels effortless by now

  4. check_circle

    WEEK 8+

    Long-Term Support

    ✔ Ongoing full-strength daily support
    ✔ A routine built on the dose research actually uses
    ✔ Consistent potency, batch after batch
    ✔ Built for the long haul, not a quick fix
 

Real Stories. Real Life Support.

See how consistent daily use of Aviora has helped customers feel lighter, more comfortable, and better balanced from the inside out.

  • Didn't Know K2 Even Mattered

    "I'd never heard of pairing K2 with nattokinase until a friend mentioned it. Now I get both, full-strength, without figuring out separate dosing myself. Simple change, easy to stick with."

    EMILY R.

  • Stopped Buying Two Bottles

    "I was already taking a separate K2 supplement alongside my nattokinase — CardioFlow just combined what I was already doing into one softgel, at a real dose of both. One less bottle on my counter, same routine."

    JASON M.

  • Exactly the dose I needed.

    I've tried a couple of nattokinase brands over the years, but Aviora is the first one where I actually knew what I was getting. Two capsules, 10,000 FU, no blend, no serving-size confusion. Consistent use has made it an easy habit to keep

    SARAH T.

  • Simple. Full-dose. Effective

    I wanted a nattokinase that didn't require four softgels to hit the label claim. After using Aviora consistently, I've noticed steadier energy and better circulation throughout the day. I'll definitely keep using it

    DAVID K.

    Discover Why Thousands Trust Aviora

    More Than a Maintenance Dose – Full Concentration, Done Right.

    Aviora delivers nattokinase at the full 10,800 FU dose used in research — not the diluted, split-across-softgel version most brands ship — paired with a full dose of Vitamin K2 (MK-7), researched for its own role in calcium metabolism and vascular flexibility. A delayed-release softgel shell protects both actives from stomach acid, while third-party testing verifies potency and purity in every batch.

    • Full-strength 10,800 FU nattokinase
    • Full-strength K2 (MK-7) — not a token amount
    • No splitting softgels to hit the label claim
    • Support for healthy circulation, from two different angles
    • Verified potency, batch to batch
    • One consistent daily routine

    A Single Enzyme, Dosed at Full Strength.

    Aviora delivers 10,800 FU of nattokinase per serving — the concentration used in research, not the diluted 2,000–4,000 FU maintenance dose most brands ship — paired with a full research-level dose of Vitamin K2 (MK-7), the nutrient most commonly recommended alongside it. Both actives sit in a delayed-release softgel built to survive stomach acid, so more of each dose reaches your bloodstream instead of breaking down early. Three softgels, once daily — no blends, no fillers, no serving-size math for either ingredient.

    Backed By Research & Traditional Use

    Nattokinase is an enzyme derived from natto, a fermented soybean food with centuries of traditional use in Japan, and it continues to be studied for its role in healthy circulation and fibrin balance. Aviora delivers it at 10,800 FU per serving — the concentration used in that research — with every batch independently tested for potency and purity. Designed for consistent daily support, not a quick fix.

    Frequently Asked Questions

    Find answers about Aviora’s formula, daily use, expected results, and quality standards.

    Vitamin K2 (MK-7) is researched for helping activate proteins that direct calcium toward bone and away from soft tissue, supporting normal vascular flexibility — a different mechanism from nattokinase's role in fibrin balance. We paired them because that's how the research pairs them, not because one boosts the other's marketing story.

    Because 2,000–4,000 FU — what most of the category ships — isn't the dose research actually uses. We built CardioFlow around the number that matters, not the number that's cheap to manufacture.

    Nattokinase works with your body's natural fibrin balance rather than blocking enzymes. Vitamin K2, separately, can reduce how well warfarin works, since warfarin functions by blocking vitamin K. Talk to your doctor before adding it to your regimen, especially if you're on anticoagulants like warfarin or Eliquis.

    Dosage: 3 softgels daily (10,800 FU Nattokinase + K2)

    Timing: On empty stomach, 30 minutes before meals

    Consistency: Same time every day — this is a routine, not a quick fix

    Nattokinase has over 1,000 years of safe use in Japan and is well-tolerated. Vitamin K2 is also well-tolerated with no established upper intake limit. Do not take it if: scheduled for surgery within 2 weeks, have bleeding disorders, are pregnant/nursing, or take warfarin without doctor approval.

    Yes — and honestly, that's part of the point. Natto's smell and texture keep most people from ever getting a consistent dose of either compound from food. We deliver both, full strength, verified, in a softgel you'll actually want to take every day.

    Your purchase is protected by a 30-day money-back guarantee. Contact the support team within the guarantee period to request a refund.