Natural Factors Natural Factors - C Extra + Quercetin, 90 vcap
Natural Factors C Extra + Quercetin - An immune-support formula that combines the antioxidant benefits of vitamin C with the bioflavonoid quercetin for enhanced support. Vitamin C is not stored by the body and needs to be consumed daily in order to maintain the levels recommended for overall health. Vitamin C is an essential nutrient that helps in collagen formation, which is needed for the normal development and maintenance of bones, cartilage, teeth, and gums. It also helps maintain the body’s ability to metabolize nutrients. Quercetin is a bioflavonoid found in many fruits, vegetables, and herbs. It has a wide range of benefits, including allergy relief, cardiovascular support, and enhancing the body’s absorption and use of vitamin C. Both vitamin C and quercetin also help protect tissues from free radical damage. C Extra + Quercetin contains 500 mg of Vitamin C blended with 250 mg of Quercetin for anyone looking for additional immune and antioxidant support.
Price
Regular Canadian retail price: $22.98 CAD. Price Vault members pay below retail on this product. Member pricing is private and shown after a free opt-in, with no membership fee, no minimum order and no subscription.
In stock. Free shipping across Canada on orders over $89, flat $9.95 under that. 30 days to request a return, with return shipping paid by the customer. Ships from Victoria, BC.
See member pricing on Natural Factors Natural Factors - C Extra + Quercetin
Why people keep reordering it
- Year-round defense
- Daily support for a resilient immune response.
- Antioxidant support
- Helps protect cells from everyday oxidative stress.
- Tradition meets research
- Time-tested ingredients in clinically informed doses.
Best suited to: wants a daily vitamin c with something extra, prefers a capsule to a large tablet, wants a three month bottle at one a day.
What the research supports
One capsule daily gives 500 mg of vitamin C and 250 mg of quercetin. Ninety capsules is a three-month bottle.
Quercetin trials use 500 to 1000 mg a day, often split in two.
- Collagen formation (evidence: strong, from human deficiency studies, biochemical)
- Vitamin C is a required cofactor for the enzymes that cross-link collagen. Without enough, connective tissue is the first thing that suffers.
- Immunity (evidence: moderate, from randomized controlled trial, meta-analysis)
- Vitamin C concentrates in immune cells and gets used up fast under physical stress. Supplementation helps most in people training hard or run down, less in everyday health.
- Antioxidant protection (evidence: moderate, from randomized controlled trial, meta-analysis)
- Vitamin C and quercetin both neutralize free radicals, and vitamin C recycles used-up quercetin back to active form. At 250 mg the quercetin here is a modest amount.
Read the literature: Collagen formation on PubMed, Immunity on PubMed, Antioxidant protection on PubMed.
Is it right for you
Worth it if
- Wants a daily vitamin C with something extra
- 500 mg covers the vitamin C side properly and the 250 mg of quercetin adds a flavonoid that plain ascorbic acid does not carry.
- Prefers a capsule to a large tablet
- The 500/250 ratio fits in a vegetarian capsule, where the higher quercetin version has to be a coated tablet.
- Wants a three month bottle at one a day
- 90 capsules on a one-a-day schedule with no dose splitting and no timing rules beyond taking it with food.
Look elsewhere if
- Buying it for the quercetin
- The 500/500 tablet version doubles the quercetin for the same vitamin C, and a standalone quercetin at 500 mg twice daily is what actually matches the research.
- Wants gram-level vitamin C through winter
- A plain ascorbic acid powder or 1000 mg tablet is far cheaper per gram, and lets you split doses through the day, which is how you keep plasma levels up.
- Gets stomach upset from ascorbic acid
- A buffered mineral ascorbate, such as calcium or sodium ascorbate, is much gentler at the same vitamin C content.
What to expect
Nothing you feel from the vitamin C unless your intake was genuinely low. Quercetin at this amount is not something that produces a noticeable day-to-day change. Judge it as a background nutrient over months, and take it with food if ascorbic acid on an empty stomach bothers you.
How it compares
- Compared with a plain 1000 mg vitamin C tablet
- Adds 250 mg of quercetin, a flavonoid that plain ascorbic acid does not provide and that appears to be recycled alongside vitamin C in tissue. The tradeoff: Half the vitamin C per pill at a higher price, and 250 mg of quercetin is a token amount next to what the research used, so you may be paying for the name on the label.
Product details
- Medicinal ingredients
- Vitamin C (ascorbic acid), Quercetin (bioflavonoids)
- Ingredient form
- vcap
- Servings per container
- 90
- Suggested use
- 1 capsule daily with food or as directed by a health care practitioner.
- Country of manufacture
- Canada
- Independent testing
- ISURA
- Certifications
- Non-GMO, Made in Canada
- Storage
- Store in a cool, dry place
- Brand
- Natural Factors
How to take it
1 capsule daily with food or as directed by a health care practitioner.
- Store in a cool, dry place away from direct light.
- Keep out of reach of children.
- Consult a practitioner if you are pregnant, nursing or on medication.
Ingredients
Each capsule contains
- Vitamin C (ascorbic acid)
- 500 mg
- Quercetin (bioflavonoids)
- 250 mg
Non-medicinal ingredients
Vegetarian capsule (carbohydrate gum [cellulose], purified water), microcrystalline cellulose, vegetable grade magnesium stearate (lubricant), stearic acid, silica.
Free from
Contains no artificial colours, preservatives, or sweeteners; no dairy, starch, sugar, wheat, gluten, yeast, soy, corn, egg, fish, shellfish, animal products, salt, tree nuts, or GMOs. Suitable for vegetarians/vegans.
Interactions and cautions
- Medications
- Some immune botanicals may interact with immunosuppressant medication. Review with your practitioner.
- Timing
- Separate from medications by 2 to 4 hours unless directed otherwise by a healthcare practitioner.
- Pregnancy and breastfeeding
- Consult a healthcare practitioner before use if pregnant or breastfeeding.
- General
- Use only as directed. Discontinue and consult a practitioner if you experience an adverse reaction.
This product is not intended to diagnose, treat, cure or prevent disease. Consult a healthcare practitioner before use. Free certified advisors are available at 1-888-386-1211, Mon to Fri, 9am to 5pm PT.
Questions about Natural Factors - C Extra + Quercetin
- Is this the genuine, authentic product?
- Yes. It is identical to what you would pay full price for anywhere else, sourced through our authorized supplier relationships.
- How is the price below retail?
- We buy direct, with nobody in the middle taking a cut, and we sell it for close to what we paid. You see the price privately because you have unlocked the Vault.
- How fast does it ship?
- Orders placed before 12pm PT are processed the same day and ship within two business days. Shipping is free over $89, and a flat $9.95 under that.
- Can I return it?
- You have 30 days after it arrives to request a return. Product must be unused, in its original packaging, with proof of purchase, and return shipping is paid by you. Find it cheaper anywhere in Canada and we will match the price.