Fasting Cancer

How Fasting and Nutritechnology Are Creating a Revolution in Cancer Prevention and Treatment

By: Valter Longo

A groundbreaking guide to how fasting and nutritechnology are revolutionizing the prevention and treatment of cancer, from the bestselling author of The Longevity Diet

Despite all our scientific advances, which have allowed us to prevent and treat so many deadly diseases, almost one in two people will develop cancer in the U.S. In Fasting Cancer, Dr. Valter Longo, one of the leading scientists in the field of nutrition and cancer, reveals the results of decades of research on the fasting and nutrition technology-based studies to defeat cancer in the body, making only tumor cells much more vulnerable to therapy while protecting the healthy cells.

Fasting Cancer creates a new path in which the patient is an active codriver of the therapy by turning on the body’s ability to fight cancer. Dr. Longo’s studies show that the fasting-mimicking diet is beginning to make cancer therapies potentially more effective and less toxic to patients, thus providing an evidence-based complementary approach to mainstream treatments. The book also describes how the everyday Longevity Diet and plant-based ketogenic diet can support cancer therapies.

Rich in patient stories and clinical data, Fasting Cancer is a book that invites everyone—doctors, healthcare professionals, patients, and family members—to understand the extraordinary potential of a new approach to help fight cancer.

©2025 Valter Longo (P)2025 Penguin Audio

Critic reviews

“In this revolutionary book, Dr. Valter Longo provides a road map to understand and treat cancer in a new way, an approach that has the potential to change the landscape of cancer therapy forever. It is a must read for all those who are about to start treatment, who have cancer, or who have loved ones with cancer.”—Mark Hyman, MD, New York Times bestselling author of Young Forever

“Dr. Longo provides a better understanding of the interactions between cancer, metabolism, and immunity and opens up opportunities to integrate fasting into therapeutic strategies for cancer.”—Heinz-Josef Lenz, MD, professor at USC’s Keck School of Medicine

“Dr. Longo’s elegant yet straightforward description of the effects of nutrition and energy balance provides an eye-opening understanding of the potential of fasting on cancer, the immune system, and longevity.”—Debu Tripathy, MD, chairman of the breast medical oncology department at the University of Texas MD Anderson Cancer Center