What kind of interaction is it?

Synergy: a documented combination effect that is stronger or more useful than either substance taken alone.

Is this interaction backed by published research?

Yes. NutriStack lists 2 citation rows for the Fisetin + Quercetin pair, each linking to PubMed by PMID where available. Full sourcing methodology at https://nutristackapp.com/methodology/interactions.

Supplement × Supplement·a synergy·Emerging evidence

Fisetin + Quercetin

Q: Can I take Fisetin and Quercetin together?

Yes. The combination of Fisetin and Quercetin produces a measurable benefit. Fisetin and quercetin are both flavonoid senolytic candidates with overlapping antioxidant and anti-inflammatory mechanisms, and they are frequently studied together in the senolytic literature.

Q: How does this affect a NutriStack Stack Score?

+2 to your Stack Score per scored synergy row.

Synergy Emerging evidence

Fisetin and quercetin are both flavonoid senolytic candidates with overlapping antioxidant and anti-inflammatory mechanisms, and they are frequently studied together in the senolytic literature.

Supplement × Supplement

Open the interaction checker → Read the methodology

From the database

What the row says.

Every entry follows the same shape: what is happening, the mechanism, and the recommendation.

Substances

Fisetin and Quercetin

Pair type

Synergy

Evidence

Emerging

Source citations

Scope

Supplement × Supplement

Last verified

June 4, 2026

SynergyEmerging evidence

What is happening. Fisetin and quercetin are both flavonoid senolytic candidates with overlapping antioxidant and anti-inflammatory mechanisms, and they are frequently studied together in the senolytic literature.

Mechanism. Both are flavonoids acting on overlapping antioxidant (Nrf2), anti-inflammatory (NF-kB), and senescence-related pathways; quercetin is the flavonoid used in human dasatinib-plus-quercetin senolytic trials, while fisetin senolytic data are mainly from aged-mouse studies.

Recommendation. May be combined within typical supplemental doses. Combined senolytic benefit in humans is not established, so do not assume additive clinical effects.

Stack Score

How it moves the number.

Effect on the composite score

If both Fisetin and Quercetin are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).

The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.

Sources

Sources, by evidence tier.

Every claim on this page is cited. PMIDs link straight to PubMed.

Reference material

1Yousefzadeh MJ et al. Fisetin is a senotherapeutic that extends health and lifespan. EBioMedicine. 2018.Needs sourceNo link
2Gorgoulis V et al. Cellular senescence: Defining a path forward. Cell. 2019.Needs sourceNo link

Check your full routine

One pair was the worked example.

Drop your supplements and prescriptions into NutriStack and it runs every pair at once: every interaction, synergy, timing rule, and contraindication, each linked to its primary source.

Open the interaction checker → Browse the research index