Douglas Laboratories Quercetin Bromelain Complex | 310539021804
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Douglas Laboratories Quercetin Bromelain Complex 100 tablets


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Douglas Laboratories Quercetin Bromelain Complex 

Quercetin-Bromelain Complex, provided by Douglas Laboratories, is a unique formulation of quercetin, buffered vitamin C, and bromelain. Quercetin is a bioflavonoid that has excellent antioxidant activity.* Magnesium ascorbate is a buffered form of vitamin C, a key antioxidant, which synergistically supports the quercetin activity. Bromelain is a proteolytic enzyme purified from pineapple, which is active and stable at the acidic levels found in the stomach.*

Quercetin is a naturally occurring bioflavonoid with strong antioxidant activity.* The antioxidant activity of quercetin protects the gastrointestinal tract in several ways.* Quercetin prevents oxidation of lipids.* The gastrointestinal tract has an increased exposure to oxidative stress due in part to the lowered pH.* It is important to protect the lipid bilayer of the cell wall of the gastrointestinal tract because these cells serve as an important part of the body’s immune system.* Vitamin C can improve the ability of the quercetin to preserve glutathione.*

Bromelain is a supportive nutrient in helping prevent allergens from crossing the gastrointestinal tract.* Bromelain assists in the breakdown of large macromolecular protein complexes. This reduces the chance that these complexes will leave the stomach untouched or in large fractions retaining their recognizable antigenic form that could pass through these gastric lesions inducing an allergenic response.* Quercetin, vitamin C and bromelain are all dietary nutrients that help support the immune system.* They inhibit the absorption of substances into the body that may induce the allergic response. In addition quercetin is used by the body to help reduce the allergic immune response in the intestinal tract, possibly providing nutritional support to normal inflammation processes.*


  • Potent antioxidant
  • Protects metabolic activity and cellular structure of the highly vulnerable cells of gastrointestinal tract from toxic free radical damage.
  • Prevents the depletion of glutathione from the cells of the intestinal tract.
  • Increases mucus secretion from gastric cells.
  • Reduces the immune response to allergens.
  • Prevents the uncontrolled peristaltic activity found in diarrhea.


Quercetin-Bromelain Complex may be taken as a dietary supplement for those individuals who wish to increase their intake of this important bioflavonoid, key antioxidant vitamin C, and the proteolytic enzyme Bromelain.*

Suggested Use

Two to four tablets twice daily between meals as a dietary supplement, or as directed by physician.*


Store in a cool, dry place, away from direct light. Keep out of reach of children.


These statements have not been evaluated by Health Canada or the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Nutrition Facts
Serving Size: 1 Tablet

Amount Per Serving

% Daily Value
Quercetin 333 mg  
Vitamin C (Magnesium ascorbate) 200 mg  
Magnesium (ascorbate) 13 mg  
Bromelain (2,000 GDC per gram) 100 mg  
Note: Serving Sizes are rounded to the nearest whole serving




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