Daizu — Nattokinase
Something went wrong adding this to your cart. Please try again.
Subscribe & Save 55%: Ships every 30 days at your locked-in subscriber price. Skip, pause, swap, or cancel anytime from your account — no fees, no phone calls. Your card is only charged when each order ships.
Circulation Support · Fermented Nattokinase
1,000 Years of Tradition. One Daily Capsule of Nattokinase.*
Traditional Japanese fermentation, standardized for potency — supporting healthy fibrin levels and circulation, naturally.*
Why Circulation Quietly Changes With Age
Your circulatory system relies on a delicate balance. Fibrin — a protein your body uses to form clots and repair damage — is essential when healing from a cut. But fibrin can also build up in ways that aren't helpful, especially as we age. That buildup doesn't announce itself — cold hands, tired legs by evening, a sluggishness easy to write off as "just getting older."
Ren et al., 2022 (Frontiers in Cardiovascular Medicine); Reviews in Cardiovascular Medicine, 2023; Kurosawa et al., 2015 (Scientific Reports). Individual results vary.*
30-day money-back guarantee
Daizu Is Different
Single-Purpose, Not a Kitchen-Sink Blend
No trendy multi-ingredient stack diluting the dose. Just standardized nattokinase, sourced from traditional fermentation.
Third-Party Tested, Every Batch
Potency and purity verified independently — not just claimed on the label.
No Fillers, No Additives
Clean extraction, nothing unnecessary added to bulk out the capsule.
Rooted in 1,000 Years of Tradition
Nattokinase comes from natto, a daily staple in Japan for centuries — not a lab-invented trend.
Built for Daily Use, Not a Quick Fix
One capsule, once a day — designed to be part of a consistent routine, not a 7-day cleanse.
What to Expect With Daizu
- Nattokinase begins supporting fibrinolytic activity*
- Research shows measurable enzyme activity within hours of a single dose*
- Consistent daily use is when most research protocols show meaningful engagement with fibrin markers*
- A daily routine starts to feel established
- Longer clinical studies (up to 12 months) have tracked sustained daily use at this stage*
- Continued support for circulation as part of an established routine*
Reflects how nattokinase functions based on published research, not guaranteed individual outcomes.*
How to Take Daizu
One capsule daily with a full glass of water.
On an empty stomach for optimal absorption.
Take daily as part of your routine for best results.
How Daizu Compares
| Daizu | Beetroot Powder | Pomegranate Juice | CoQ10 Capsules | |
|---|---|---|---|---|
| Supports healthy fibrin levels* | ✓ | — | — | — |
| 1,000+ years traditional use | ✓ | — | — | — |
| Supports circulation* | ✓ | ✓ | ✓ | — |
| Third-party tested potency | ✓ | Varies | Varies | Varies |
| No added sugar | ✓ | Varies | Usually not | ✓ |
Validated by Science & Tradition
Modern Science
- Fibrinolytic activity studied across multiple clinical trials*
- Research spanning single-dose to 12-month supplementation*
- Standardized FU (Fibrinolytic Unit) potency measurement
Traditional Wisdom
- Over 1,000 years of natto consumption in Japan
- Traditional fermentation preserves enzymatic activity
- A daily staple long before the biochemistry was understood
Not completely satisfied with Daizu? Return it within 30 days of your order for a full refund — no questions asked.
Frequently Asked Questions
What is FU and why does it matter?
FU stands for Fibrinolytic Units — the standard measurement of nattokinase enzyme activity, used to compare potency across products.
Is nattokinase safe?
Nattokinase has natural blood-thinning properties. See our full safety information — talk to your doctor before starting if you're on any medication, especially blood thinners.
How do I take Daizu?
One capsule daily, preferably on an empty stomach for optimal absorption. Take consistently as part of your routine.
How is Daizu different from other nattokinase supplements?
Third-party tested for potency and purity, sourced from traditional fermentation, made without unnecessary fillers.
What's your return policy?
All Daizu orders are backed by a 30-day risk-free guarantee. If you're not satisfied, return it within 30 days of your order date for a full refund.
Can I cancel my subscription anytime?
Yes. Skip, pause, swap products, or cancel your subscription anytime from your account — no fees, no phone calls required.
Customer Reviews
One additional review pending confirmation before publishing.
Ready to Try Daizu?
Traditional fermentation. Modern purity. One capsule a day.
Shop Daizu Now →30-day money-back guarantee · Free shipping on every order
Nattokinase has natural blood-thinning properties and isn't right for everyone. Read our full safety information →
*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before use, especially if pregnant, nursing, taking medication, or managing a medical condition.