That's a nice video explaining autophagy. He point out fasting and intermittent fasting as way of triggering autophagy. Actually, intermittent fasting is one kind o fasting.

Autophagy are induced by fasting or low protein diet. The Nobel prize winner explain exactly, it's the level of protein from our food intake determine the autophagy level. Protein restriction will cause autophagy to speed up.

That's why you see vegan people looking young because they are getting little protein from plants. Fruitarian fast, juice fast all have the autophagy speeding up effects.

Over eating and over supplement protein will cause our autophagy to slowdown or shut down leading to high cancer risk, rapid aging and dozen of health conditions.

I only do protein loading on the weekend, the rest of the time I keep my protein extremely low.