Product Description

Isolated, purified and encapsulated nattokinase, an enzyme derived from boiled soybeans and a selected, patented strain of Bacillus subtilis natto. Nattokinase NSK-SD® was the first nattokinase introduced into the US market, and it has established standardization and quality levels for all nattokinase, with comprehensive safety studies and proven potency. It is vegetarian, non-irradiated, and free of vitamin K2. NSK-SD® has two Japanese and three U.S. patents, and is recognized by the JHFA (Japan Health and Nutrition Food Authorization) and JNKA (Japan Nattokinase Association) as authentic nattokinase. NSK-SD® is a trademark of Japan BioScience Laboratory.

1. What are the benefits of Nattokinase NSK-SD 50 mg by Allergy Research Group?

The two major health benefits of Nattokinase NSK-SD are to support vascular health and blood flow.

2. How do Nattokinase NSK-SD 50 mg capsules help for cardiovascular health?

This supplement has Nattokinase NSK-SD which is beneficial for heart health, and maintaining blood pressure and circulation. Consult an expert before starting this supplement.

3. Does Nattokinase NSK-SD 50 mg help with blood circulation?

 Nattokinase NSK-SD 50 mg contain nattokinase.The fibrinolytic activity of nattokinase supports blood flow by degrading fibrin clots and supporting healthy coagulation.

4. When should I start taking Nattokinase Supplement and Where can I buy it?

Start taking it after consulting your doctor. You can buy Nattokinase from your doctor or online from a website that has a huge range of GMP-certified products.

5. Why should I choose Nattokinase Supplement over other heart health products?

Nattokinase is a research-based supplement that has proven effectiveness

6. What is Nattokinase 50mg used for?

It is used for heart health, maintaining blood pressure and circulation.

7. Are there any known side effects of Nattokinase 50mg?

This is a high-quality supplement and is considered safe due to its purity and tested effectiveness.

8. Can I take Nattokinase 50mg with other medications?

If you are taking anticoagulants or other medicines, do not take this supplement without consulting your healthcare provider. 

9. How does Nattokinase Supplement work?

The fibrinolytic activity of nattokinase supports blood flow by degrading fibrin clots and supporting healthy coagulation.


  • 5 stars: 6 (86%)
  • 4 stars: 1 (14%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
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Wade Collins
Safe, Natural Boost for Circulation

I bought Allergy Research Group Nattokinase NSK-SD 50 mg for my uncle, who has been focusing on heart health and circulation. After a few weeks of taking it, he noticed improved energy levels and better overall circulation. The supplement is derived from non-GMO soy and is free from common allergens, which made it a safe choice for him. If you're considering a natural approach to support cardiovascular health for a loved one, this Nattokinase supplement is worth trying.

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Fiona Nace
Nattokinase 50 mg NSK-SD

One of my relatives who’s really into natural health supplements suggested I try Nattokinase NSK SD by Allergy Research Group, and I’m glad I took their advice. I’ve been using this nattokinase supplement for a few weeks now, and I’ve noticed better circulation and overall heart health. The 50 mg dosage per capsule seems perfect, and the 300-capsule bottle lasts a long time. It’s a great, gentle option for supporting cardiovascular health, and I’ve been feeling more energetic overall. If you're looking to try nattokinase, this one’s definitely worth checking out!

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Jason White
Improves Circulation and Overall Wellness

My circulation has improved, and I feel a noticeable boost in my vitality. I’m more energized, and it feels like my body is functioning better overall, especially during physical activities.

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Rebecca Miller
Boosts Circulation for Better Wellness

My circulation has improved, and I feel a noticeable boost in my overall vitality. I’m more energized, and it feels like my body is functioning better, especially during physical activities.

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Jessica Miller
Boosts Circulation for Better Wellness

My circulation has improved noticeably. I feel more vibrant and full of energy, with better blood flow that’s making me feel more alive and active, especially during physical activities.

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James Young
Improved My Circulation Significantly

Since I began using this, I’ve noticed a real improvement in my circulation. My hands and feet are warmer, and I feel more vibrant and full of life than I have in years.

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Jill Reichel

Nato is one of the supplements that I use to help with my heart health. I will continue to use this always. I am very satisfied with this product. My husband also takes this.