Dr. David Williams
Japanese breakthrough for healthy circulation and blood pressure

Nattokinase (60 capsules, 30-day supply) | blood circulation vitamins & supplements

Item# NAT
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1 Bottle
$29.99
Buy 3, Get 1 FREE
Was: $119.96
Now: $89.97
Buy 5, Get 2 FREE
Was: $209.93
Now: $149.95

The best all-natural circulation supplement

  • Supports normal circulation, blood flow, and blood viscosity
  • Helps maintain your body's normal blood-clotting mechanism
  • Supports natural production of plasmin, which reduces fibrin
  • Helps maintain normal blood pressure levels

Nattokinase is a specialized enzyme in natto that was discovered in 1980 by Dr. Hiroyuki Sumi. Additional research has been done, including 17 published studies in Japan and here in the US, which shows it supports your body’s normal blood-clotting mechanisms and helps to maintain normal blood pressure levels.

Nattokinase is one of several enzymes related to your circulation. Fibrin, the enzyme that causes blood clotting, is usually broken down by another enzyme, plasmin. Plasmin aids normal platelet aggregation and circulation. But plasmin production declines with age. Nattokinase helps by facilitating blood flow the same way plasmin does, and also supports your body's natural production of plasmin.

Blood pressure improvement begins almost immediately

My Nattokinase uses the patented NSK-SD™ formulation, which has its naturally-occurring vitamin K removed. Plus, unlike some others, this product gives you a full 2,000 FU (fibrin units) per day, the dosage recommended by Dr. Sumi and other leading researchers.

Blood pressure improvement begins almost immediately

Ingredients and Dosage

Doctor's Suggested Use: Take 1 capsule twice daily; 1 capsule with morning meal and 1 capsule before going to bed.

Serving Size: 1 Capsule
Servings Per Container: 60

Ingredient Amount Per Serving % DV
Nattokinase (from soybean) 25 mg *
* Daily Value (DV) not established

Other ingredients: Microcrystalline cellulose, gelatin, silicon dioxide, magnesium stearate

CONTAINS: SOY

WARNING: If you take Coumadin (warfarin) or other blood thinning products, or are pregnant or lactating, consult a health care professional before taking this product.
Keep out of reach of children.

NSK-SD40® is a registered trademark of JBSL.

Each capsule provides 1,000 FU (fibrin units) nattokinase activity.

Standardization Levels: Nattokinase 40,000 FU per gram

Science and Quality

  • In a study of 15 healthy men and women, taking 100 mg (2,000 FU) of NSK-SD® significantly increased blood flow within 3 hours after ingestion.1
  • In a randomized, placebo-controlled trial, 86 participants received either 2,000 FU of nattokinase placebo daily for 8 weeks. The group receiving natto showed reduced blood pressure significantly more so (-2.84 mmHg) than the placebo group after 8 weeks. Plasma rennin also decreased significantly among those taking natto for 8 weeks.2

1 Improvement of blood flow increase by ingestion of NSK-II. Food Style 21 2006. 8:21.
2 Kim, et al. Hypertens Res. 2008;31(8):1583–88.

Product Quality