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Qrc6.0
Quercetin Research
Likely helps
258 peer-reviewed studies
What the evidence says
Likely helps
Quercetin appears to help in 13 of 14 studies with measurable effects — the evidence leans clearly favourable.
Most evidence is from high-quality meta-analyses and randomised trials published 1993–2026 with a typical study size of 50 participants.
Based on 258 studies · 42 meta-analyses · 160 RCTs · 906,400 total participants
Confidence
High confidence
What the studies found
13helped1unclear· 244 more without graded effect data
Women's healthMay help manage menopausal symptoms like hot flashes and mood changes · 4-8 weeks · Supports healthy estrogen metabolism and hormonal equilibrium · 4-8 weeks
Mostly mechanism / observational8 studies
Endurance & exercise performance
Mostly mechanism / observational7 studies
Recovery
Mostly mechanism / observational7 studies
Cognitive function
Mostly mechanism / observational6 studies
Depression & mood
Mostly mechanism / observational4 studies
Men's vitality
Too few graded studies2 studies
Liver health
Too few graded studies2 studies
By the numbers
Pulled from 58 studies with measurable effects
Likely real effects
67%
across studies
People studied
906k
typical study: 50 people
Strongest designs
202
42 pooled, 160 randomised
Showed benefit
93%
13/14 studies
How long studies ran
1–4 weeks
2
1–3 months
5
3+ months
2
Populations Studied
Humans4
General population3
COVID-19 patients2
Idiopathic pulmonary fibrosis patients2
Active research area
99 studies in the last 5 years · Latest meta-analysis: 2026
199320092026
1Tyrosinase inhibition and melanin reductionMeta-AnalysisCited 14×n=1,398 · large study2025
Okselni T et al. · Naunyn-Schmiedeberg's archives of pharmacology (2025)
Noticeable benefit
← WorseNo effectBetter →
Furthermore, quercetin significantly inhibited tyrosinase activity (Z-score, 1.95), resulting in a significantly reduced melanin content (Z-score, 2.56).
A significant reduction in DNA damage (Z-score, 3.27), melanoma cell viability (Z-score, 2.97), and tumor formation was also observed to ensure the promising activity of quercetin for skin issues.
This review highlights quercetin's potential as a multifaceted agent in skin care and treatment.
2COPD management outcomesMeta-AnalysisCited 2×n=894 · large study2025
This systematic review confirms that the efficacy of dietary polyphenols is significantly composition-specific.
Wu D et al. · Frontiers in immunology (2025)
This systematic review confirms that the efficacy of dietary polyphenols is significantly composition-specific.
Curcumin and salidroside can improve the course of COPD by regulating blood pressure, inflammation, and the coagulation pathway, supporting the hypothesis of "polyphenol targeting of metabolic-inflammatory networks".
However, the possible negative effects of anthocyanins warn against ingredient heterogeneity.
3ADHD symptom improvement with antioxidantsMeta-AnalysisCited 5×n=3,650 · very large study2024
The rankings of safety and efficacy of the 12 antioxidants vary.
Zhou P et al. · PloS one (2024)
The rankings of safety and efficacy of the 12 antioxidants vary.
Due to the low methodological quality of the included studies, the probability ranking cannot fully explain the clinical efficacy, and the results need to be interpreted with caution.
More high-quality studies are still needed to verify our findings.
6Systematic ReviewCited 15×n=269 · medium study2024
Heat-clearing herbs are useful and promising for the protection against and prevention of ischemic encephalopathy.
Zhao A et al. · Annals of medicine (2024)
Heat-clearing herbs are useful and promising for the protection against and prevention of ischemic encephalopathy.
It can be seen that the components of heat-clearing Chinese medicines can exert cerebroprotective effects through multiple pathways, which provides us with a reference for further development and study of heat-clearing Chinese medicines in the treatment of ischemic cerebrovascular diseases.