Description
Doctor's Best Natto-Serra combines nattokinase and serrapeptase, two enzymes commonly researched together for circulatory and immune health, in a single daily vegan capsule. The formula also includes Serrateric, a calcium-based delivery system designed to help optimise serrapeptase absorption in the intestines.
What's in each capsule
- 2,000 FU nattokinase, from fibrinase enzyme
- 40,000 SPU serrapeptase enzyme, from Serratio species
- 29 mg calcium (2% DV), from tricalcium phosphate and calcium stearate in Serrateric
The capsule itself is a delayed-release format made from hypromellose, gellan gum and purified water, rather than a standard capsule or enteric coating. Other ingredients in the Serrateric blend are maltodextrin and medium-chain triglycerides, and the product contains soya.
Why combine nattokinase and serrapeptase?
Nattokinase and serrapeptase are both proteolytic enzymes, but they are researched for slightly different roles: nattokinase is more closely associated with fibrin and circulatory support, while serrapeptase is more commonly researched for its role in immune health. Combining them in one capsule means you do not need to manage two separate enzyme supplements and their own dosing schedules. The added Serrateric blend is specifically included to help support serrapeptase absorption, rather than being an active ingredient in its own right.
Who this suits
The once-daily, single-capsule dose can suit people who want a straightforward routine despite taking two enzymes at once, rather than dosing nattokinase and serrapeptase separately. At 90 capsules per bottle, it also offers a longer three-month supply than some nattokinase-serrapeptase blends. If you would prefer a higher-FU enteric-coated alternative, our Solaray Nattokinase Serrapeptase, 3,000 FU is another combination worth comparing.
How to use it
Adults take one capsule daily without food, or as advised by a nutritionally informed doctor. Each 90-capsule bottle provides a three-month supply at this once-daily dose.
Who should be cautious
This product is not recommended if you are pregnant, breastfeeding, allergic to soya, or have poor digestion. Consult a doctor before use if you are taking blood thinners, and stop taking it if you experience nausea, vomiting or stomach upset. These warnings apply specifically because the formula combines two active enzymes rather than nattokinase alone, so it is worth reading the full label before starting. For more on nattokinase dosing and who should exercise caution, our Nattokinase Benefits, Dosage & Side Effects Guide is a useful starting point.
Storage
Store in a cool, dry place, out of reach of children.
