Antioxidant
Citrus Bioflavonoids
Also known as: Bioflavonoids, Hesperidin, Rutin, Quercetin
Plant compounds from citrus fruits that enhance vitamin C absorption and provide antioxidant, anti-inflammatory, and vascular support benefits.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every Citrus Bioflavonoids product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Thorne Quercetin Phytosome | 92 A | $0.77 |
| 2 | Thorne Quercetin Complex | 90 A | $0.90 |
| 3 | Thorne Advanced Nutrients | 88 A | $2.40 |
| 4 | Thorne Pre-Workout Elite | 88 A | $1.83 |
| 5 | Thorne Vitamin C with Flavonoids | 88 A | $0.26 |
| 6 | Thorne PolyResveratrol-SR® | 87 A | $1.97 |
| 7 | Nutricost Quercetin (1000mg) | 87 A | $0.37 |
| 8 | Pure Encapsulations PureDefense with NAC | 87 A | $1.90 |
| 9 | Pure Encapsulations Quercetin | 86 A- | $0.97 |
| 10 | Pure Encapsulations Systemic Enzyme Complex | 86 A- | $1.35 |
| 11 | Pure Encapsulations NeuroPure | 86 A- | $1.18 |
| 12 | Jarrow Formulas Quercetin | 86 A- | $0.34 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much Citrus Bioflavonoids should I take?
The typical range is 250-1000 mg daily. Safe long-term
When should I take Citrus Bioflavonoids?
With vitamin C. Optional.
Which form of Citrus Bioflavonoids is best?
Complex/blend — Multiple bioflavonoids together. Other forms in the catalog: Hesperidin, Rutin.
Is Citrus Bioflavonoids safe?
Commonly reported: Generally well tolerated. Serious warnings: None significant. Safe
Which Citrus Bioflavonoids supplement scores highest?
Thorne Quercetin Phytosome, at 92/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- Vitamin C enhancement
- Vascular health
- Capillary strength
- Antioxidant support
How it works
- Enhance vitamin C absorption and retention
- Strengthen capillary walls
- Antioxidant and anti-inflammatory effects
- Support collagen synthesis
Dosage
- Typical range
- 250-1000 mg daily
- Timing
- With vitamin C
- With food
- Optional
- Duration
- Safe long-term
- Special populations
- Those taking vitamin C supplements
Forms
- Complex/blend
- Hesperidin
- Rutin
Safety
Common side effects
- Generally well tolerated
Contraindications
- None known
Products containing Citrus Bioflavonoids
Top-scoring supplements in our catalog that list Citrus Bioflavonoids on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Synergistic with vitamin C; moderate evidence for vascular health
Grade B: Some human trials support key claims; further confirmation needed.
Cited research for Citrus Bioflavonoids
Clinical studies referenced across Formulate guides that mention citrus bioflavonoids. Each links to the full study page with PubMed source + the guides that cite it.
Related in Antioxidant
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.