Doctor's Best Natto-Serra - 90 vcaps
Doctor's Best Natto-Serra - 90 vcaps
"Very quick delivery. Used 3 times, each order arrived the next day before 12:00"
Hugo Dover
"Reliable & original products, with fast next day delivery. Have been using Welzo for over a year now."
Elina Goulliard
"Welzo is great, lots of support from customer service who are easy to get a hold of and quick delivery."
Elizabeth Moore

Product Description

Natto-Serra by Doctor's Best delivers circulatory support and immune calm through nattokinase and serrapeptase, a vegan, non-GMO enzyme blend crafted for optimal intestinal delivery. Developed by Doctor's Best, a name rooted in enzyme science and quality, it uses Serrateric coating to optimise delivery. The vegan, non-GMO mix supports everyday wellbeing, without allergens that annoy some.

Available Sizes & Variants:

90 capsules — convenient daily dose for ongoing circulatory support

Benefits & Features:

  • Supports healthy circulation with natural fibrinolytic action.
  • Delivers nattokinase and serrapeptase in a protected, easy to absorb form through Serrateric coating, helping enzymes reach the gut intact and promote smoother blood flow to support circulatory comfort and daily activity.
  • Vegan, non-GMO formulation suits plant-based lifestyles while avoiding common allergens and fillers.
  • Synergistic enzyme blend supports circulatory flow and immune function, as observed in some studies.
  • Doctor's Best backing means strict sourcing and Serrateric coating that protects enzymes until the intestine, helping you feel steadier throughout the day.

Doctor's Best Natto-Serra sits on a solid heritage of enzyme science and practical manufacturing. Serrateric coating protects the enzymes until they reach the intestine, helping delivery feel smoother than older coatings. Natto-Serra blends nattokinase from natto with serrapeptase from Serratia E-15 in a vegan soy based formula that avoids common allergens. This blend has earned a loyal following among health enthusiasts seeking natural circulatory support with a clean ingredient list. Some customers pair it with probiotics, n acetylcysteine, or a vitamin d supplement for broader wellness.

Ingredients/Specifications

Serrapeptase enzyme (from Serratia sp.) 40,000 SPU, Nattokinase (from fibrinase enzyme) 2,000 FU, Calcium (from tricalcium phosphate and calcium stearate in SerratericTM) 29 mg, SerratericTM (maltodextrin, tricalcium phosphate, calcium stearate, medium chain triglycerides), delayed release capsule (hypromellose, gellan gum, purified water). Contains Soy.

UK Delivery & Returns

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

How to use

Take 1 capsule daily without food, or as recommended by a nutritionally informed physician. Store in a cool, dry place. Not recommended for individuals who are pregnant, lactating, allergic to soy, or have poor digestion. Consult a physician before use if taking blood thinners. Stop taking if you experience nausea, vomiting, or stomach upset.

Please consult the product packaging for accurate instructions on how to use the product.

Nutritional Information

Serving Size1 Veggie Capsule
Calories29
Total Fat0g
Saturated Fat0g
Trans Fat0g
Cholesterol0mg
Sodium0mg
Total Carbohydrate7g
Dietary Fiber0g
Sugars0g
Protein0g
Calcium29mg

The Active Ingredient Is: Nattokinase

Nattokinase is a proteolytic enzyme derived from natto, used to support normal circulatory function through enzymatic activity.

This formulation includes nattokinase in a vegan, non-GMO context with Serrapeptase as a supporting enzyme; the coating technology aids enzyme delivery to the intestines.

What Does Nattokinase Do?

Nattokinase is involved in the breakdown of fibrin, with research suggesting a role in promoting healthy circulation as part of a broader enzymatic blend.

Dr. Sumi of University of Tokyo found that nattokinase acts as a fibrinolytic enzyme that can contribute to normal vascular function, supporting EFSA-aligned functions for proteolytic enzymes.

This product is not intended to diagnose, treat, cure, or prevent any disease.

Why it's Welzo

Why Doctor's Best Natto-Serra is Welzo Selected

We decided on Doctor's Best as our supplier for Natto-Serra because this brand embodies enzyme science and quality at the heart of its approach. Doctor's Best is recognised for developing enzyme-based formulations and uses Serrateric coating to boost intestinal delivery, supporting the product's intended role in circulatory and immune health. The brand prioritises vegan, non-GMO ingredients and provides vegetarian capsules, matching Welzo’s commitment to high-purity, ethically produced supplements.

Our vetting criteria centre on brand credibility, production philosophy, and testing integrity. Doctor's Best shows a genuine specialty in proteolytic enzyme tech, which resonated with our team as a strong fit for this enzyme-based supplement. The formula—nattokinase and serrapeptase with the Serrateric coating—was evaluated for delivery and formulation, ensuring it matches the intended health-support profile. This brand was thoroughly evaluated by our medical team for compliance with the standards we enforce.

Doctor's Best Natto-Serra - 90 vcaps

72 Reviews
See full range
Natto-Serra by Doctor's Best delivers circulatory support and immune calm through nattokinase and serrapeptase, a vegan, non-GMO enzyme blend crafted for optimal intestinal delivery.
£32.88
Sale price £32.88
Save 15% Regular price £38.69
Secure Transaction
Excellent
Free UK delivery of orders over £50
Order within , for delivery by tomorrow, April 27.
As seen in

Product Description

Natto-Serra by Doctor's Best delivers circulatory support and immune calm through nattokinase and serrapeptase, a vegan, non-GMO enzyme blend crafted for optimal intestinal delivery. Developed by Doctor's Best, a name rooted in enzyme science and quality, it uses Serrateric coating to optimise delivery. The vegan, non-GMO mix supports everyday wellbeing, without allergens that annoy some.

Available Sizes & Variants:

90 capsules — convenient daily dose for ongoing circulatory support

Benefits & Features:

  • Supports healthy circulation with natural fibrinolytic action.
  • Delivers nattokinase and serrapeptase in a protected, easy to absorb form through Serrateric coating, helping enzymes reach the gut intact and promote smoother blood flow to support circulatory comfort and daily activity.
  • Vegan, non-GMO formulation suits plant-based lifestyles while avoiding common allergens and fillers.
  • Synergistic enzyme blend supports circulatory flow and immune function, as observed in some studies.
  • Doctor's Best backing means strict sourcing and Serrateric coating that protects enzymes until the intestine, helping you feel steadier throughout the day.

Doctor's Best Natto-Serra sits on a solid heritage of enzyme science and practical manufacturing. Serrateric coating protects the enzymes until they reach the intestine, helping delivery feel smoother than older coatings. Natto-Serra blends nattokinase from natto with serrapeptase from Serratia E-15 in a vegan soy based formula that avoids common allergens. This blend has earned a loyal following among health enthusiasts seeking natural circulatory support with a clean ingredient list. Some customers pair it with probiotics, n acetylcysteine, or a vitamin d supplement for broader wellness.

Ingredients/Specifications

Serrapeptase enzyme (from Serratia sp.) 40,000 SPU, Nattokinase (from fibrinase enzyme) 2,000 FU, Calcium (from tricalcium phosphate and calcium stearate in SerratericTM) 29 mg, SerratericTM (maltodextrin, tricalcium phosphate, calcium stearate, medium chain triglycerides), delayed release capsule (hypromellose, gellan gum, purified water). Contains Soy.

UK Delivery & Returns

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

How to use

Take 1 capsule daily without food, or as recommended by a nutritionally informed physician. Store in a cool, dry place. Not recommended for individuals who are pregnant, lactating, allergic to soy, or have poor digestion. Consult a physician before use if taking blood thinners. Stop taking if you experience nausea, vomiting, or stomach upset.

Please consult the product packaging for accurate instructions on how to use the product.

Nutritional Information

Serving Size1 Veggie Capsule
Calories29
Total Fat0g
Saturated Fat0g
Trans Fat0g
Cholesterol0mg
Sodium0mg
Total Carbohydrate7g
Dietary Fiber0g
Sugars0g
Protein0g
Calcium29mg

The Active Ingredient Is: Nattokinase

Nattokinase is a proteolytic enzyme derived from natto, used to support normal circulatory function through enzymatic activity.

This formulation includes nattokinase in a vegan, non-GMO context with Serrapeptase as a supporting enzyme; the coating technology aids enzyme delivery to the intestines.

What Does Nattokinase Do?

Nattokinase is involved in the breakdown of fibrin, with research suggesting a role in promoting healthy circulation as part of a broader enzymatic blend.

Dr. Sumi of University of Tokyo found that nattokinase acts as a fibrinolytic enzyme that can contribute to normal vascular function, supporting EFSA-aligned functions for proteolytic enzymes.

This product is not intended to diagnose, treat, cure, or prevent any disease.

Why it's Welzo

Why Doctor's Best Natto-Serra is Welzo Selected

We decided on Doctor's Best as our supplier for Natto-Serra because this brand embodies enzyme science and quality at the heart of its approach. Doctor's Best is recognised for developing enzyme-based formulations and uses Serrateric coating to boost intestinal delivery, supporting the product's intended role in circulatory and immune health. The brand prioritises vegan, non-GMO ingredients and provides vegetarian capsules, matching Welzo’s commitment to high-purity, ethically produced supplements.

Our vetting criteria centre on brand credibility, production philosophy, and testing integrity. Doctor's Best shows a genuine specialty in proteolytic enzyme tech, which resonated with our team as a strong fit for this enzyme-based supplement. The formula—nattokinase and serrapeptase with the Serrateric coating—was evaluated for delivery and formulation, ensuring it matches the intended health-support profile. This brand was thoroughly evaluated by our medical team for compliance with the standards we enforce.

See full range
1 of 4

Does Natto-Serra cause a decrease in blood pressure?

Who should avoid taking Natto?

What are Natto-Serra's side effects/ disadvantages?

Can Natto cause an increase in uric acid?

Content team: Dr Sameer Nakedar

Role: Chief Medical Officer

MBBS (London, UK), MRCGP, PGCert

Content team: Paola Drexlar

Role: Medical Content Writer, UK

BA (Hons) Journalism