Natural Factors: C Extra + Quercetin & Bioflavinoids (90cap)


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Natural Factors C Extra + Quercetin Bioflavonoids is an immune-support formula that combines the antioxidant benefits of vitamin C and the bioflavonoid quercetin in a potent 2:1 ratio.

Vitamin C helps in:

  • Collagen formation to maintain healthy bones, cartilage, teeth, and gums
  • Quercetin enhances the activity of vitamin C in the body. 
Product Certifications
  • Soy-Free
  • Egg-Free
  • Fish-Free
  • Corn-Free
  • Dairy-Free
  • Yeast-Free
  • Non-GMO
  • Sugar-Free
  • Gluten-Free
  • Startch-Free
  • Shellfish-Free
  • Tree Nut-Free
  • Sweetener-Free 
  • Preservative-Free

This product is suitable for Vegans & Vegetarians 

Suggested Use

Take 1 capsule daily with food, or as directed by a health care practitioner. Consult a healthcare practitioner for use beyond 12 weeks. 


Medicinal Ingredients (Per Cap)

  • Vitamin C (Ascorbic Acid)(500mg)
  • Quercetin (Bioflavinoids)(250mg)

Non-Medicinal Ingredients: Microcrystalline cellulose, dibasic calcium phosphate dihydrate, croscarmellose sodium, carbohydrate gum, coating (carbohydrate gum [cellulose], glycerin), stearic acid, vegetable grade magnesium stearate (lubricant), silica.

Cautions & Warnings

Consult a health care professional prior if you are pregnant or breatfeeding. Keep out of reach of children.

** for freshness, store in cool, dark place.