LifeSource Vitamins Quercetin Complex β 500 mg, Tablets β Antioxidant, Inflammation & Immune Support*
LifeSource Vitamins Quercetin Complex delivers a high-potency 500 mg dose of quercetin, a widely studied flavonoid that supports antioxidant defenses, healthy inflammatory response, cardiovascular balance, and immune resilience.* Produced in FDA-registered, GMP-certified facilities and verified for purity and potency.
Research-Driven & Verified Product.
Explore the clinical research, ingredient science, and global evidence supporting this product below.
Research Promise: At LifeSource Vitamins, our commitment is rooted in research and results. Every benefit below is supported by human clinical studies indexed in the National Institutes of Health (NIH) via PubMed, with full texts available in the National Library of Medicine (NLM) PubMed Central (PMC) when available. In addition, we reference reviews from 39 leading health organizations and insights from 20 top global universities to ensure our guidance aligns with credible science.*
Clinically Studied Benefits
β Supports healthy blood pressure β Meta-analysis shows significant BP reductions, especially at >500 mg/day.
NIH/PubMed β Serban, 2016
β Confirms BP effects in newer analyses β Additional reviews report SBP lowering and insulin improvements.
NIH/PubMed β Popiolek-Kalisz, 2022
β Anti-allergy activity (mast-cell modulation) β Inhibits histamine release and allergic mediators.
NIH/PMC β MlΔek, 2016
β Aids exercise recovery β Systematic review/meta-analysis shows improved recovery after muscle-damage protocols.
NIH/PubMed β Rojano-Ortega, 2023
β Glycemic support (human RCTs) β Meta-analysis reports improvements in glycemic control in metabolic disorders.
NIH/PubMed β Ostadmohammadi, 2019
β Antimicrobial properties β Broad activity against Gram-positive/negative bacteria and fungi reviewed.
NIH/PMC β Nguyen, 2022
β Antioxidant & anti-inflammatory pathways β Comprehensive modern review across systems.
NIH/PMC β Aghababaei, 2023
β Clinical evidence in respiratory-infection settings β Human evidence summarized in systematic review.
NIH/PubMed β Cheema, 2023
Additional Potential Benefits* (more research needed)
β Quercetin + vitamin C may lower CRP/IL-6 β 8-week human trial.
NIH/PubMed β Askari, 2013
β Exercise performance/recovery β Recent narrative/systematic overviews.
NIH/PMC β Kurtz, 2023
β Mechanistic support for insulin sensitivity & gut-microbiome modulation (preclinical).
NIH/PMC β Tan, 2021
University-Led & Academic Studies
β Academic groups β Improved cognitive function and reduced fatigue in controlled settings.
NIH/PubMed β Shevtsov, 2003
We monitor research from leading institutions β
Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, MIT, the University of Florida, Oregon State University β Linus Pauling Institute, Tufts, Boston University, Cornell, Columbia, Ohio State β to align with credible science.*
Key Ingredients
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Quercetin (500 mg) β Widely studied flavonoid supporting vascular, immune and antioxidant health (NIH/PMC β Aghababaei, 2023).
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Bromelain β Proteolytic enzyme supporting inflammatory balance and tissue comfort (NIH/PMC β Rathnavelu, 2016).
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Vitamin C (250 mg) β Synergistic antioxidant support.
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Manganese (10 mg) β Supports enzymatic antioxidant defenses.
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Turmeric (50 mg, 95% curcumin) β Polyphenols for inflammation modulation.
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Citrus Bioflavonoids (100 mg) β Enhance quercetin absorption and antioxidant activity.
Brief Benefit Bullets
- Potent antioxidant & inflammation modulation*
- Supports healthy blood pressure & endothelial function*
- Helps maintain immune balance & respiratory comfort*
- Natural antihistamine support for seasonal allergens*
- Aids exercise recovery after muscle-damage bouts*
- Glycemic & metabolic support signals*
- Broad antimicrobial activity supported in reviews*
- Everyday cellular defense & healthy aging support*
- Made in FDA-registered, GMP-certified facilities
- Non-GMO; high-potency tablet; quality-assured
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3rd-party lab tested for purity & potency
Suggested Use
Adults take 1 tablet daily with a meal, or as directed by your healthcare professional.*
Product Specifications
β’ Serving Size β 1 Tablet
β’ Amount Per Serving β Vitamin C (ascorbic acid) 250 mg (278% DV); Manganese (as amino acid chelate) 10 mg (435% DV); Quercetin 500 mg; Bromelain 50 mg (from Ananas comosus fruit extract, standardized to 1800 GDU/g); Turmeric 50 mg (Curcuma longa rhizome extract, standardized to 95% curcumin); Citrus Bioflavonoids 100 mg
β’ Other Ingredients β Cellulose, cellulose gum, silica, food glaze, vegetable stearin, magnesium vegetable stearate, calcium silicate, modified cellulose
β’ Quality β Third-party tested for identity, potency & purity
LifeSource Vitamins β Proudly American β Since 1992
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Quercetin Complex β 500 mg with vitamin C, manganese, bromelain (1800 GDU/g), turmeric 95% & citrus bioflavonoids for antioxidant, immune & inflammation support. 3rd-party tested. Clinically Studied Ingredients β NIH/PubMed!*
