Phone 0800 HEALTH

Best Serrapeptase

Serrapeptase helps promote & maintain healthy sinus & airway function & a healthy immune response.

Doctor's Best Serrapeptase, featuring Serrateric™, a superior alternative to enteric coating that protects the enzyme until it reaches the intestine for optimal absorption. Each veggie cap provides 40,000 active units of Serrapeptase, a proteolytic enzyme first isolated from the non-pathogenic Serratia bacteria species strain E15. Proteolytic enzymes break down proteins. Serratia E15 was discovered in the Japanese silkworm, which harnesses serrapeptase enzyme activity to break down its cocoon wall. Serrapeptase helps support and maintain healthy sinus and airway function, as well as helping to support a healthy immune response. Suitable for vegans and vegetarians. 60 Veggie capsules

RRP $79.90, price $69.90.

90 Vegicaps Print this page


Doctor's Best


90 Vegicaps

Common Uses

Doctor's Best Serrapeptase

  • Helping to support a healthy immune system and immune response
  • Helping with a more balanced immune response to maintain airway health
  • In studies, Serrapeptase helped support airway clearance

Suggested Dosage

Adults: Take 1 to 3 capsules daily, away from food.

Health Information

Serrapeptase Promotes & Maintains Healthy Sinus and Airway Function and Supports Healthy Immune Response

The mucous membranes are a thin tissue layer or epithelium that lines the body’s hollow structures (cavities) opening to the exterior, such as the upper respiratory system. They secrete a slightly viscous fluid called mucus, which is actually a complex viscoelastic gel that lubricates and moistens the cavity surfaces.

As a part of normal, healthy physiology, mucus is the first line of defense in the nose and lungs to trap and filter inhaled dust, pollutants, and other potentially damaging agents.

Proteolytic enzymes such as serrapeptase can break down inappropriate protein complexes in the mucus, thereby favorably influencing its properties and helping to support the healthy balance between adequate mucous viscosity/elasticity and airway comfort levels associated with the mucous membranes of the respiratory system.

Research with serrapeptase for maintenance of healthy sinus function began decades ago in Japan. Studies thus far indicate that serrapeptase is a safe and useful supplement to promote favorable viscosity of nasal and bronchial mucus.

Two of the earliest human trials found that serrapeptase had favorable effects on upper airway viscosity.  In these assessments, mucus was collected from participants after a 4-week supplementation period and evaluated using an rheometer to determine its viscoelastic properties.

The enzyme’s action most likely involves the breakdown of mucus protein structures, consequently allowing the cilia (microscopic hairlike projections in the mucosal epithelium of the upper respiratory tract) to helpfully transport mucus in the airway.

Serrapeptase can also significantly affect sputum viscoelasticity.  In an investigation of forty individuals who were randomly assigned to one of five groups, six participants were given serrapeptase for one week.

Sputum viscoelasticity was analyzed using a rheometer and researchers concluded that serrapeptase altered the “relaxation behavior” of sputum—meaning that serrapeptase helped support airway clearance.

In a subsequent larger double blind trial, 193 participants were randomized into two groups and were instructed to take either serrapeptase or placebo 3 times daily after meals for one week.

After 4 days and at the end of the 7– 8 day period, mucus secretion, airway freedom, and measures of immune response were significantly favorable in the serrapeptase group compared with the placebo group. A recent study in which the immune system of rats was challenged further confirms human data that serrapeptase can be used for supporting the immune system.

In a controlled and randomized open-label study of 29 subjects, researchers again observed the effects of serrapeptase supplementation on sputum.

After 4 weeks, subjects taking serrapeptase had significantly less morning sputum with favorable viscoelasticity; furthermore, the serrapeptase group had fewer neutrophils in their sputum, signifying a more balanced immune response to maintain airway health.


Each 1 veggie capsule contains: Serrapeptase 40,000 Serratio Units (serratiopeptidase activity units). Other Ingredients: Cellulose, Serrateric™, modified cellulose (vegetarian capsule). Serrateric™ is a trademark of Deerland Enzymes, Inc. Does Not Contain: milk, egg, wheat, gluten, soy, sugar, sweeteners, starch, salt, or preservatives. Contains nothing other than listed ingredients.


Keep out of reach of Children. 

Other Recommendations

Best Acetyl-L-Carnitine - 60 Capsules

Best Acetyl-L-Carnitine
60 Capsules

Best Cinnamon Extract - 60 Veggie Capsules

Best Cinnamon Extract
60 Veggie Capsules

Best Collagen Types 1 & 3 - 180 Tablets

Best Collagen Types 1 & 3
180 Tablets

Best Curcumin Phytosome - 60 Veggie Caps

Best Curcumin Phytosome
60 Veggie Caps

Best Nattokinase - 90 Veggie Capsules

Best Nattokinase
90 Veggie Capsules

Best SAMe 200 - 60 Tablets

Best SAMe 200
60 Tablets

Best Stabilized R-Lipoic Acid - 60 Veggie Caps

Best Stabilized R-Lipoic Acid
60 Veggie Caps

Best Vitamin D3 1000IU - 180 Softgels

Best Vitamin D3 1000IU
180 Softgels



Doctor's Best



Free shipping

All supplement orders over NZ$50 are delivered freight free NZ wide right to your door.
Food items and cleaning products may be excluded from freight free - we will contact you if additional delivery charges apply in these instances. A charge of $3.50 will apply to all rural delivery.


Home | Previous Page | Back to top

Choose a health topic

Join Our Facebook Community
Harmony Now Available at
Oasis Sun Care Sunblock
natural health practitioners nz
100% new zealand owned
useful resources approved by natural therapy for all