Short-term fasting or intermittent fasting (IF) induces metabolic shifts that can selectively stress cancer cells while protecting healthy cells. Fasting lowers circulating levels of glucose, insulin, and insulin-like growth factor 1 (IGF-1), all of which are growth-promoting factors for many tumors. This metabolic restriction forces cancer cells to rely on alternative, often less eff... https://www.beatcancerfoundation.org/