Senolytics: Clearing Zombie Cells
Senolytics selectively kill senescent cells — the damaged cells that refuse to die, secrete inflammatory signals, and drive age-related decline. D+Q is the flagship; fisetin is the OTC cousin.
How It Works
Senescent cells accumulate with age — they refuse to divide but also refuse to die, secreting SASP cytokines that inflame surrounding tissue. Senolytics selectively trigger their apoptosis.
Dasatinib and quercetin disrupt the survival-protein signaling that senescent cells depend on. Healthy cells have alternate pathways; senescent cells don't.
In mice, D+Q cleared senescent cells across multiple organs: adipose, liver, kidney, lung, and brain. Functional outcomes improved in each.
Small Phase 2 studies at Mayo Clinic and Baptist Health showing senescent-cell reduction in human fat tissue. Efficacy endpoints (frailty, IPF) still being collected.
What the Data Shows
Key Takeaways
- Senescent cell accumulation is a validated aging mechanism ("hallmark of aging")
- D+Q reduces senescent cells in human adipose tissue (Mayo open-label data)
- Mouse studies show healthspan + lifespan extension with intermittent dosing
- Hit-and-run protocol is plausible — you don't need chronic exposure
- Fisetin offers an OTC alternative with some of the same mechanism at lower potency
- Human efficacy for disease endpoints (frailty, fibrosis, cognition) is unproven
- Dasatinib is a leukemia drug with known side effects (bleeding, edema, pleural effusion)
- Optimal human dosing and cycling frequency not established
- Senolytics may not clear ALL senescent cell subtypes
- Rebound senescence — cells may re-accumulate between cycles
Frequently Asked Questions
What is the D+Q protocol?
Most protocols use dasatinib 100mg + quercetin 1000mg orally for 2 consecutive days, once per month. This matches the Mayo Clinic Phase 2 dosing and allows time for senescent cells to clear without chronic exposure to the drugs.
Can I do senolytics without a prescription?
Yes — fisetin alone is OTC and has senolytic activity at 20mg/kg doses. D+Q requires a prescription for dasatinib. Some anti-aging clinics prescribe D+Q specifically for senolytic use.
How often should I cycle senolytics?
Most protocols cycle monthly. Some clinicians recommend every 3-6 months. There is no established optimal interval in humans.
What are the side effects?
Dasatinib: bleeding risk, fluid retention, pleural effusion, fatigue. Quercetin and fisetin are generally well-tolerated at senolytic doses. Intermittent dosing reduces cumulative risk.
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Dasatinib is a prescription oncology drug. Quercetin and fisetin are dietary supplements. The senolytic protocols described are investigational.
Not medical advice. Consult a qualified healthcare provider before starting senolytic therapy — especially if you take anticoagulants or have cardiovascular disease.