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Dr. Valter Longo is the director of the Longevity Institute at the University of Southern California (USC) 4 10 12. He has led numerous studies at the university investigating how fasting and fasting-mimicking diets (FMD) can prevent and treat cancer 4 7 9. Research from Longo's laboratory indicates that these dietary interventions can delay tumor progression and increase the efficacy of chemotherapy through both immune-dependent and immune-independent mechanisms 1 5. His work further demonstrates that fasting can protect healthy tissues from chemotherapy-associated toxicity while potentially weakening cancer cells 6 11. These findings are supported by both in vitro experiments and randomized clinical trials conducted under his leadership at USC 5 8.