What is Quercetin?
A flavonoid with antioxidant and potential senolytic properties.
Quercetin is a flavonoid found in onions, apples, and berries. It has antioxidant properties and is being researched as a senolytic (clearing senescent cells) when combined with dasatinib. As a standalone supplement, benefits are modest.
What the evidence says
The overall evidence grade for Quercetin is C (limited — early or preliminary data, mostly mechanistic or animal). Antioxidant properties established. Senolytic research is early.
Specific findings with supporting evidence:
- Has antioxidant properties. Evidence grade B.
- Being researched as senolytic. Evidence grade C.
Best-supported outcomes:
- Antioxidant support.
- Possible immune support.
Where marketing outpaces evidence:
- The claim that "Proven senolytic in humans alone" is not supported by the evidence (grade C).
- Marketing often overstates: Proven senolytic.
- Marketing often overstates: Anti-aging supplement.
Dose and timing
The typical effective dose for Quercetin is 500–1000 mg. Bioavailability is limited; phytosome forms may help.
Take it in the morning and afternoon with food. With food for absorption.
Who it's for, and who should skip it
Most relevant for:
- Those seeking flavonoid/antioxidant support.
Not appropriate for:
- Those expecting senolytic benefits from quercetin alone.
Safety and cautions
Bioavailability. Absorption is limited; phytosome forms may be better. Drug interactions. May affect drug metabolism.
Common mistakes
- Expecting senolytic effects from quercetin alone.
- Ignoring bioavailability.
Myths vs reality
A common misconception: Quercetin alone clears senescent cells. In reality, senolytic research uses quercetin with dasatinib, a prescription drug.
How it interacts with other compounds
- Quercetin works well alongside vitamin c — vitamin C may enhance quercetin absorption.
Questions people ask
Is quercetin a senolytic? Research combines it with dasatinib. Quercetin alone is not proven senolytic.
Editorial note
This guide summarizes the published evidence on Quercetin. It is educational content, not medical advice. Confirm with your clinician if you take prescription medications or manage a chronic condition.