Vitamin C and Bio-Quercetin
Scored by the Formulate Research Team · Last reviewed July 2026
Score Breakdown
Three factors carry this score; three more are checked separately and can only take points away. Hover or tap to see what drove each one.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| Vitamin C289 systematic reviews · 808 randomised trials | 1000 mg |
| Bio-Quercetin Phytosome | 15 mg |
Certifications & Testing
Other Ingredients
Microcrystalline Cellulose, Stearic Acid, Croscarmellose Sodium, Stearate, Silica, Hydroxypropyl Methylcellulose, Glycerin
Recommended Use
Directions: Take one (1) tablet daily with food, or as recommended by a healthcare practitioner.
Warnings
Read the entire label and follow the directions carefully prior to use. Warnings: Keep out of reach of children. Do not exceed recommended dose. Do not purchase if outer seal is broken or damaged. When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating. To report a serious adverse event or ob
Frequently Asked Questions
What is Life Extension Vitamin C and Bio-Quercetin's Formulate score?
Life Extension Vitamin C and Bio-Quercetin scores 76 out of 100 (grade B+) on Formulate's ingredient-level rubric: clinical evidence, dose accuracy and bioavailability carry the score, while manufacturing, transparency and safety are checked separately and can only deduct.
Is Life Extension Vitamin C and Bio-Quercetin worth it?
Life Extension Vitamin C and Bio-Quercetin scores 76/100 (grade B+). That's an above-average result — most of its doses and ingredient forms are well-chosen, with only minor gaps in dosing, transparency, or testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Life Extension Vitamin C and Bio-Quercetin?
Each serving contains Vitamin C (1000 mg), Bio-Quercetin Phytosome (15 mg). Serving size: 1 Vegetarian Tablet(s). 250 servings per container.
How do I take vitamin c and bio-quercetin?
Directions: Take one (1) tablet daily with food, or as recommended by a healthcare practitioner.
Who makes Vitamin C and Bio-Quercetin?
Vitamin C and Bio-Quercetin is made by Life Extension. See Formulate's full grade and product lineup for Life Extension on its brand page.
Is Life Extension Vitamin C and Bio-Quercetin third-party tested?
Life Extension lists the following certifications and testing for this product: Gluten free Non GMO Le certified, Vegetarian, Gluten-Free.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.