Autophagy is getting more popular on YouTube. It's a major part of the benefit behind fasting, whether Fasting Mimicking Diet or water fasts. This video describes some of the key concepts behind:

cell growth & division vs autophagy;

cancer treatment & fasting-mimicking diet;

Valter Longo's experience & research in fasting;

IGF1 - Insulin-like Growth Factor 1 & fasting;

Rapamycin & MTOR - the Mammalian Target Of Rapamycin.

Here's a link to a podcast by Kirk Hamilton, a PA with a preventive podcast & website, and James Kelly MD, MBA - the CMO for L-Nutra, the company that markets Prolon, Valter Longo's Fasting Mimicking Diet.