Vitamin C with Bioflavonoids
Vitamin C with bioflavonoids combines ascorbic acid with plant compounds like quercetin and rutin that enhance vitamin C absorption and stability. This combination provides superior antioxidant protection and immune support compared to vitamin C alone.

Origin & History
Vitamin C with bioflavonoids is a combination of ascorbic acid and plant-derived compounds known for enhancing the absorption of vitamin C. This blend is often found in citrus fruits and other plant sources.
Historical & Cultural Context
The use of citrus fruits for preventing scurvy dates back to the 18th century, and the combination of vitamin C with bioflavonoids has been popularized since the mid-20th century as a potent health supplement.
Health Benefits
- Enhances immune function by supporting white blood cell activity, crucial for fighting infections. - Acts as a powerful antioxidant, reducing oxidative stress and protecting against cellular damage. - Supports cardiovascular health by improving blood vessel function and reducing cholesterol levels. - Enhances skin health by promoting collagen production, leading to improved skin texture and elasticity. - Increases iron absorption, aiding in the prevention of anemia. - Promotes brain health by reducing oxidative damage and supporting cognitive function. - Supports adrenal health, helping to manage stress and improve energy levels.
How It Works
Ascorbic acid stimulates neutrophil chemotaxis and enhances interferon production while acting as an electron donor to neutralize reactive oxygen species. Bioflavonoids like quercetin and hesperidin inhibit vitamin C oxidation through their phenolic structures and enhance cellular uptake via sodium-dependent vitamin C transporter (SVCT) modulation. The flavonoids also independently scavenge free radicals and support nitric oxide synthesis in vascular endothelium.
Scientific Research
Numerous studies have shown that bioflavonoids can enhance the absorption and efficacy of vitamin C, leading to improved health outcomes. However, more research is needed to fully understand the synergistic effects.
Clinical Summary
Multiple randomized controlled trials with 100-2000 participants demonstrate that vitamin C with bioflavonoids (500-1000mg daily) reduces common cold duration by 8-23% and severity scores by 15-30%. Meta-analyses of cardiovascular studies show 200-500mg daily combinations improve endothelial function markers by 12-18% and reduce LDL oxidation by 20-35% over 8-12 weeks. Immune function studies consistently show enhanced natural killer cell activity and reduced infection rates, though effect sizes vary considerably between populations.
Nutritional Profile
- Rich in vitamin C, providing antioxidant protection. - Contains bioflavonoids, which enhance vitamin C absorption. - Typically sourced from citrus fruits and other plant materials.
Preparation & Dosage
Common dosage ranges from 500 mg to 2000 mg per day of vitamin C with 50 mg to 500 mg of bioflavonoids. Consult a healthcare provider before use.
Synergy & Pairings
Rose Hips, Acerola Cherry, Quercetin, Rutin, Citrus Fruits
Safety & Interactions
Vitamin C with bioflavonoids is generally well-tolerated up to 2000mg daily, with gastrointestinal upset being the primary side effect above 1000mg. Bioflavonoids may enhance iron absorption and can interact with blood-thinning medications like warfarin due to quercetin's anticoagulant properties. High doses may interfere with certain laboratory tests including glucose and occult blood measurements. Pregnancy and breastfeeding safety is established for typical supplemental doses under 1000mg daily.