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251K Lincoln Road

Waitakere 0610

22B Cavendish Drive

Manukau 2104

4 Aranui Road

Auckland 1060

1 Wagener Place

Auckland 1025

Doctors Best

Doctor's Best Natto-Serra 90 Caps

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Doctor's Best Natto-Serra 90 Caps

About Doctor's Best Natto-Serra

Doctor’s Best Natto-Serra (Nattokinase-Serrapeptase) is a combination of two natural enzymes that have been used as dietary supplements for decades. Serrapeptase (serratio-peptidase) is a protein-digesting enzyme isolated from the friendly bacterium Serratia E-15 discovered in the Japanese silkworm. Nattokinase also digests protein and is derived from “natto”, a fermented soy food popular in Japan for centuries. This nattokinase is free of vitamin K. The serrapeptase is formulated with Serrateric™, a superior alternative to enteric coating that protects the enzyme until it reaches the intestine for optimal absorption.

  • Science-Based Nutrition
  • (Nattokinase-Serrapeptase)
  • Helps Support the Circulatory and Immune System
  • Dietary Supplement
  • Vegan
  • Non-GMO / Gluten-Free



  • Helps support the circulatory system*
  • Helps support the immune system* 



Suggested Use: Adult Use: Take 1 capsule daily without food, or as recommended by a nutritionally-informed physician. 

Warnings: Not recommended for individuals who are pregnant, nursing, 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.

Keep out of reach of children.

Store in a cool dry place. 


Nutrition Information

Doctor's Best Natto-Serra 90 Caps

Serving Size: 1 Veggie Capsule

Servings Per Container: 90

Amount Per Serving

  • Calcium (from tricalcium phosphate and calcium stearate in Serrateric™)
  • 27 mg


  • Serrapeptase Enzyme (from Serratio sp.)
  • 40,000 SPU**


  • Nattokinase (from fibrinase enzyme)
  • 2,000 FU***


Other Ingredients

Serratic™ (Maltodextrin, Tricalcium Phosphate, Calcium Stearate, Microcrystalline Cellulose, Medium Chain Triglycerides), Delayed Release Capsule (Modified Cellulose, Gellan Gum, Purified Water). Contains Soy.

Non-GMO / Gluten-Free / Vegan

**SPU-serratiopeptidase activity units  ***FU-fibrinolytic activity units


*While strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by .

*Always consult with a qualified healthcare professional prior to beginning any diet or exercise program or taking any dietary supplement. The content on our website is for informational and educational purposes only and is not intended as medical advice or to replace a relationship with a qualified healthcare professional.

*All specials and deals are while stocks last only. No rain checks.

*Not all stock is carried at all stores. Message us first to avoid disappointment.