Natural Factors
C Extra + Quercetin Bioflavonoids
81/100
SUPPIE SCORE
72/100
EFFICACY
High
SAFETY
82/100
CLEANLINESS
What Does C Extra + Quercetin Bioflavonoids Do?
C Extra + Quercetin Bioflavonoids lists Vitamin C (ascorbic acid) (500 mg) and Quercetin (bioflavonoids) (500 mg) as its main actives. Any judgement should be based on the stated amounts and forms rather than the product name or marketing claims alone.
How does combining vitamin C with quercetin affect absorption and immune support?
Is this tablet form suitable for someone sensitive to fillers or with swallowing difficulties?
What is the best way to take this for ongoing antioxidant benefits?
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What Are the Benefits of C Extra + Quercetin Bioflavonoids?
Based on proven scientific research
Immune SupportModerate
Antioxidant ProtectionStrong
Collagen FormationModerate
Vitamin C Deficiency PreventionStrong
Good For:
What Are the Side Effects of Natural Factors C Extra + Quercetin Bioflavonoids?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•Vitamin C at 500 mg and quercetin at 500 mg per tablet are well within established safe daily limits for adults.
•Quercetin may interact with certain medications including antibiotics, blood thinners, and chemotherapy drugs by affecting their metabolism.
•Generally well-tolerated but high doses of quercetin could cause mild headaches or tingling in sensitive individuals.
•Store in a cool, dry place; keep out of reach of children.
•Free of common allergens including gluten, soy, dairy, nuts, and GMOs.
Potential Side Effects
Negative Interactions
Inactive Ingredients
Microcrystalline cellulose
Low RiskDibasic calcium phosphate dihydrate
Low RiskCroscarmellose sodium
Low RiskCarbohydrate gum
Low RiskCellulose
Low RiskGlycerin
Low RiskStearic acid
Low RiskMagnesium stearate (vegetable)
Low RiskSilica
Low RiskWhat Are the Ingredients in Natural Factors C Extra + Quercetin Bioflavonoids?
Vitamin C (ascorbic acid)
500 mg
Quercetin (bioflavonoids)
500 mg
microcrystalline cellulose
dibasic calcium phosphate dihydrate
croscarmellose sodium
carbohydrate gum
cellulose
glycerin
stearic acid
magnesium stearate (vegetable)
silica
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Dosage & Bioavailability
How the active doses and forms in C Extra + Quercetin Bioflavonoids compare to the research.
•Vitamin C (ascorbic acid) — 500 mg per tablet; within typical supplemental ranges of 200-2000 mg daily with high water-solubility and absorption that decreases at higher intakes.
•Quercetin (bioflavonoids) — 500 mg per tablet; standard non-glycosylated form with generally low bioavailability around 2-20% depending on co-ingestion factors.
Sources & References
No sources available
Frequently Asked Questions
Common questions about Natural Factors C Extra + Quercetin Bioflavonoids