“Flavonols?”Here!a class of plant polyphenols (includes quercetin, kaempferol, myricetin)
Hasn’t appeared in a scanned product yet.
As a supplement
Talk to your doctor or pharmacist.
Roll Call does not check drug interactions or assess personal safety.
Flavonols are a subgroup of flavonoid compounds found naturally in many fruits, vegetables, teas, and other plants — onions, kale, berries, and tea leaves are common dietary sources. On a supplement label, "flavonols" usually refers to a concentrated extract or blend standardized to contain a measured amount of this compound group, rather than a single isolated substance.
Why it’s used
Taken by some for general antioxidant support and as part of an overall diet-focused approach to cardiovascular and cellular health, mirroring interest in the fruits and vegetables that naturally contain them.
What the evidence says
Research on flavonols as a class is scattered and mostly observational, linking higher dietary intake of flavonol-rich foods to various health measures, but this does not establish that a concentrated supplement produces the same effect. Individual flavonols such as quercetin have been studied somewhat more directly, but evidence for the flavonol class as a whole, taken as a supplement, remains thin and inconsistent.
Where we looked
There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.
- PubMed: 1164 records · searched September 2026
"Flavonols"[Title/Abstract] AND (review[pt] OR "safety assessment"[Title/Abstract] OR "risk assessment"[Title/Abstract] OR toxicology[Title/Abstract] OR toxicity[Title/Abstract] OR characterization[Title/Abstract] OR characterisation[Title/Abstract]) - PubMed: 14 records · searched September 2026
"Flavonols"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH] - PubMed: 5487 records · searched September 2026
"Flavonols"[Title/Abstract]
This says what this database holds under these terms. It is not a finding that no research exists.
Context
Evidence in this area appears to exist but is difficult to pin to a single citable source for "flavonols" as a labeled group, since studies typically examine one specific compound (quercetin), a specific food source (onion or tea extract), or dietary intake patterns rather than an isolated flavonol supplement. A reviewer looking to firm this up would want to check whether the product's flavonol source and dose match a specific studied extract, such as a quercetin-only trial, rather than assuming the class-level label term carries the same evidence.
Rumors
Flavonols such as quercetin improve brain function and protect against Alzheimer's disease.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Jinfiniti — a brand: sells biomarker testing and its own supplements
How we know who this is
- “Jinfiniti is a scientist led, data driven company that is dedicated to empowering clinicians and individuals to optimize their health, performance and longevity.” (their page)
- “Jinfiniti, a scientist-led, data-driven company, empowers clinicians and individuals to optimize health, performance, and longevity by combining advanced biomarker testing with efficacious supplements and lifestyle coaching.” (their page)
- Jinfiniti — a brand: sells biomarker testing and its own supplements
Flavonols are antioxidants that protect cells from free radicals that cause aging and disease.
We haven’t found evidence strong enough to support this or rule it out.
A claim about flavonoids as a group, not this substance alone.
What was measured is not yet noted.
Who’s saying this
- Jinfiniti — a brand: sells biomarker testing and its own supplements
How we know who this is
- “Jinfiniti is a scientist led, data driven company that is dedicated to empowering clinicians and individuals to optimize their health, performance and longevity.” (their page)
- “Jinfiniti, a scientist-led, data-driven company, empowers clinicians and individuals to optimize health, performance, and longevity by combining advanced biomarker testing with efficacious supplements and lifestyle coaching.” (their page)
- Jinfiniti — a brand: sells biomarker testing and its own supplements
Flavonols protect the heart and help prevent cancer, particularly prostate cancer.
Does not support — suggestivehealth and safety evidence
Measured as an outcome.
- Impact of Flavonols on Cardiometabolic Biomarkers: A Meta-Analysis of Randomized Controlled Human Trials to Explore the Role of Inter-Individual Variability (Peer-reviewed) · Funding not checked
- Consumption of flavonoids and risk of hormone-related cancers: a systematic review and meta-analysis of observational studies (Peer-reviewed) · Funded by National Key Research and Development Program of China; National Natural Science Foundation of China; Tianjin Science and Technology Committee Foundation (government) · No conflicts declared
Who’s saying this
- Jinfiniti — a brand: sells biomarker testing and its own supplements
How we know who this is
- “Jinfiniti is a scientist led, data driven company that is dedicated to empowering clinicians and individuals to optimize their health, performance and longevity.” (their page)
- “Jinfiniti, a scientist-led, data-driven company, empowers clinicians and individuals to optimize health, performance, and longevity by combining advanced biomarker testing with efficacious supplements and lifestyle coaching.” (their page)