How people get it: Sold as a supplement.
Part of Age reversal: clearing old cells
The basics
What it is
- Quercetin is the most common bioflavonoid that people eat.
- It is found in fruits and vegetables such as apples, onions, red grapes, cherries and raspberries.
- Quercetin has not been shown to treat cancer or other diseases.
How it's thought to work
- Quercetin is known to act as an antioxidant, which neutralizes free radicals that can damage cells and DNA.
- Quercetin is thought to have anti-inflammatory properties by blocking the release of substances such as histamine.
- Lab data support quercetin as an anticancer compound, but it is unclear from clinical trials whether this happens in the human body.
What the research has found so far
- For inflammation, lab studies show an effect, but clinical trials have not been conducted.
- A systematic review showed quercetin does not help reduce the risk of ovarian cancer.
- There is no clear evidence that quercetin improves athletic performance.
Sources: Memorial Sloan Kettering (About Herbs): Quercetin ↗ · NCCIH (NIH): Dietary Supplements Marketed for Weight Loss, Bodybuilding, and Sexual Enhancement: What the Science Says ↗
On Quercetin and aging, PubMed lists 20 trials in people, 10 studies that watched people over time, 316 animal and lab studies. See the counts and searches
Stage 2 because there are 20 published trials and 156 registered trials in people, but no large ones yet.
A stage shows how far research has got, not whether it will work for you. How stages work
Side effects and risks
In a one-week trial in people with COPD, quercetin caused no severe side effects linked to the study drug, based on blood tests. Mild acid reflux was reported in both the placebo and quercetin groups.
Who should be careful, and drug interactions
In early studies, quercetin significantly increased the bioavailability (how much reaches the blood) of tamoxifen.
Amounts used in studies
What studies or labels describe, not a recommendation.
Studies have used 500, 1000 or 2000 mg a day of quercetin for one week in people with COPD. That trial found quercetin was safely tolerated up to 2000 mg a day.
Roughly what it costs
The 6 products we list that contain Quercetin cost from $33.57 to $60, as read from the makers' pages. See the products
Questions to ask your doctor
- Is Quercetin a sensible option for me, given my health and the medicines I take?
- Could Quercetin interact with any medicine or supplement I already take?
- What side effects should I watch for, and when should I stop or call you?
- Supplements aren't checked by the FDA before sale. Is there a brand or a third-party test seal you would trust?
- How would we tell whether it is helping, and when should we review it?
This is general information gathered from the sources listed, not medical advice. Talk to your doctor before starting anything new.
Products that contain it
Read from each maker's page. The research stage is for the ingredient, not proof that a product works.
| Product | Form | Quercetin per serving | Price | Per serving |
|---|---|---|---|---|
| Pure Quercetin - 500 mg, 90 capsulesProHealth Longevity · maker's page ↗ | capsule | See labelserving: 1 Capsule | $33.5790 servings | $0.37 |
| Quercetin PhytosomeThorne · maker's page ↗ | capsule | 250mgserving: 1 Capsule(s) | $46.0060 servings | $0.77 |
| ResveraCelThorne · maker's page ↗ | capsule | 250mgserving: 2 Capsule(s) | $60.0030 servings | $2.00 |
| Pure Quercetin SupplementDoNotAge · maker's page ↗ | capsule | See label | $35.00 | — |
| NAD+ Cell Regenerator™ and Resveratrol Elite™Life Extension · maker's page ↗ | capsule | 14 mgserving: 1 vegetarian capsule | $45.00 | — |
| QuercetinRenue By Science · maker's page ↗ | — | See label | $47.95 | — |
Amounts, servings and prices are as each maker lists them on its own page, checked Oct 16, 2026. Price per serving is the price divided by the servings per container on the label; “—” means the page didn't say. A serving is the maker's serving size, not a recommendation.
What experts say
No expert views collected yet. Each one we add names the person and links to where they said it.
What others are writing
Recent articles about Quercetin from health journalists, hospitals and universities. We link to them; we don't write or endorse them.
Quercetin Supplements: Worth The Hype? ↗
“Research suggests that quercetin protects against a range of health ailments, including cardiovascular diseases, cancer, diabetes , neurodegenerative diseases, allergies, osteoporosis , and arthritis .”
The article says quercetin is promising in research but more human studies are needed to confirm its benefits and safe use.
Drugs that kill “zombie” cells may benefit some older women, but not all, Mayo Clinic study finds ↗
“In the 20-week, phase 2 randomized controlled trial, 60 healthy women past menopause intermittently received a senolytic combination composed of FDA-approved dasatinib and quercetin, a natural product found in some foods.”
A Mayo Clinic trial found a dasatinib and quercetin combination mainly helped bone formation in women with many senescent cells.
Recent research
New studies that mention Quercetin appear here after the morning update.
Trials
None of the registered trials of Quercetin is one we have linked as aging-related yet.
ClinicalTrials.gov lists 156 registered trials that mention Quercetin, for any condition (the count in The science below). Here we show the ones about aging. See them all ↗
The science
Counted from PubMed and ClinicalTrials.gov on Oct 17, 2026, using one search for Quercetin in relation to aging. Each link opens the exact search.
- Randomized trials in people
- 14 search ↗
- Large trials (multicenter or phase 3)
- 1 search ↗
- Phase 3 trials
- 0 search ↗
- Trials in people
- 20 search ↗
- Studies that watched people over time
- 10 search ↗
- Animal and lab studies
- 316 search ↗
- Registered trials
- 156 search ↗
PubMed search used
quercetin[tiab] AND (aging[tiab] OR ageing[tiab] OR longevity[tiab] OR lifespan[tiab] OR "life span"[tiab] OR healthspan[tiab] OR "Aging"[mh] OR "Longevity"[mh] OR senolytic*[tiab] OR senescen*[tiab])
Counts are search results, so they include some records that only mention Quercetin. How we count
Cite or share this page
Longevity Verdict. (n.d.). Quercetin: Research stage and evidence. Retrieved October 17, 2026, from https://longevityverdict.com/treatments/quercetin
<iframe src="https://longevityverdict.com/embed/stage/quercetin" title="Quercetin: research stage on Longevity Verdict" width="340" height="72" style="border:0" loading="lazy"></iframe>
The badge shows this treatment's current research stage and links back here. It updates by itself when the stage changes.