Calorie restriction done to monkey indeed extend their life span by 30%. Same rule can apply to human which bring 80 to 120. People live in the blue zone all eat a predominately plant-based diet. And that's why the live so long.

Intermittent fasting is not famine. Famine is starvation to death. Fasting is only a process to stimulate our body's autophagy function.

When a person is aging, we see their BMI goes down. So we are thinking we should supply more protein to increase the muscle growth. The problem is when you over dose protein, it shut down our autophagy process. Underneath the surface of aging, it is in fact the slowing down of our autophagy process producing the effect of aging.Therefore, to prevent rapid aging, is to maximize the effect of autophagy. It's already shown in many lab test, starving cells can live longer.