500 mg · with Zinc & Copper


500 mg · with Zinc & Copper

60 Vegetarian Capsules (SKU 1390)

  • Supports immune health 
  • Maintains healthy bones, hair, nails, and skin
  • Helps in energy metabolism
  • Quercetin is an antioxidant bioflavonoid and free radical scavenger
  • Non-GMO and suitable for vegetarians and vegans 
  • Product informationProduct information
  • Nutritional factsNutrition
  • Advanced infoExtra
  • Questions


Natural Factors Quercetin 500 mg with Zinc & Copper is a vegan-friendly, non-GMO combination of specially selected nutrients to support immune health. Quercetin is a plant-derived bioflavonoid antioxidant. Quercetin helps zinc enter cells to further support immune function, while copper helps maintain the optimal zinc/copper ratio needed for all-round health.

Medicinal Ingredients

Each vegetarian capsule contains:
Quercetin (bioflavonoids) 500 mg
Zinc (citrate, dihydrate) 15 mg
Copper (citrate) 1000 mcg

Non-Medicinal Ingredients

Vegetarian capsule (carbohydrate gum [cellulose], purified water), microcrystalline cellulose, vegetable grade magnesium stearate (lubricant), stearic acid, silica

Suggested Use

  • A factor in the maintenance of good health. 
  • Source of antioxidants. 
  • Helps to support immune function. 
  • Helps in energy metabolism and tissue formation. 
  • Helps maintain healthy skin and connective tissue formation. 
  • Helps to produce and repair connective tissue. 
  • Helps to maintain healthy bones, hair, nails, and skin. 
  • Helps to maintain the body’s ability to metabolize nutrients. 
  • Helps to form red blood cells. 
  • Helps to maintain normal iron transport in the body. 
  • Helps to prevent zinc deficiency. 
  • Source of minerals to support biological functions, which play a key role in the maintenance of good health.

Advanced Info

Natural Factors Quercetin 500 mg with Zinc & Copper is a synergistic formula that combines the antioxidant benefits of the bioflavonoid quercetin with essential minerals for enhanced support of the immune system. 

Quercetin is a potent antioxidant bioflavonoid found in small amounts in many plant foods, including herbs, fruits, and vegetables. Supplemental quercetin helps support cellular health throughout the body by counteracting unstable free radicals, and may provide seasonal allergy relief. Quercetin also helps zinc enter cells where the mineral supports the formation of antioxidant enzymes, such as superoxide dismutaste, to fight free radicals.

Zinc and copper are essential minerals needed by the body to support hundreds of enzyme reactions involved in the synthesis of proteins and other aspects of general health. Zinc is particularly important for healthy immune function as it is needed for both innate and adaptive immunity. As copper and zinc are antagonistic, supplementing these minerals together helps prevent imbalance.

Natural Factors Quercetin 500 mg with Zinc & Copper is an effective source of antioxidants and is specially developed to maintain immune health. It contains no preservatives, sweeteners, gluten, or GMOs, and is suitable for vegetarians and vegans. Quercetin is a great choice for anyone who wants to take a plant-based approach to self-protection and is a key addition to any health defence toolkit. 

Antioxidants Bioflavonoids Quercetin Vitamin C Heart Health Immune Support