Does anyone know more about this fasting process? E.g., how long do you have to fast for this process to kick in? (Books or links on the subject also appreciate

Does anyone know more about this fasting process? E.g., how long do you have to fast for this process to kick in? (Books or links on the subject also appreciated!) > If eating to slow ageing is your aim, Lawton only has one recommendation:s fasting. “There’s something called autophagy: if you deprive your body of nutrients for an extended period of time, your body has to find alternative sources of energy. So it finds loads of gubbins in your cells – bits of protein, old organelles, the cellular damage – and it burns them. It’s like cleaning out loads of old crap from inside you.” Fasting is associated with better metabolic health, and in animal experiments “has been tried on every conceivable animal from insects through to macaques, extending their lifespans by up to 50%”.