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Limited evidenceLongevity & antioxidants

Senolytic Formulas

Blends of fisetin and quercetin sold to clear "zombie" senescent cells. The concept comes from animal work and a few tiny human pilot studies that used a prescription cancer drug alongside quercetin, not the supplement versions.

Evidence last reviewed: August 2026

What the science says

  • Senescent cells can be reduced in humans Limited evidence

    An open-label pilot in 9 people with diabetic kidney disease found that 3 days of dasatinib plus quercetin lowered senescent-cell markers in fat and skin biopsies and reduced several circulating inflammatory factors. There was no placebo group, and the active partner was a prescription drug.

  • No proven benefit on aging or disease Limited evidence

    Reviews of the senolytic field describe the human work as early-phase: the trials so far are small pilot and phase 1/2 studies of drug combinations. No trial has shown that an over-the-counter fisetin or quercetin blend improves function, healthspan or any clinical outcome.

Dosage & safety

Studied doseMarketed blends usually supply 100–500 mg fisetin and 250–1000 mg quercetin, often "pulsed" for 2–3 consecutive days a month. That schedule is copied from drug trials; it has not been tested on its own.
SafetyQuercetin inhibits CYP3A4 and P-glycoprotein and can raise levels of many medications. High-dose fisetin is poorly absorbed and has no long-term human safety data. Avoid in pregnancy and breastfeeding, and do not combine with anticoagulants or cancer treatment without medical supervision.

Scientific references

Where to buy

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