Just in case you wasn't aware of this book and his research and studies: https://www.amazon.com/Longevity-Diet-Discover-Activation-Re...

This is from Valter Longo, who wrote a book summarizing his really fascinating findings about fasting for health in animals and humans called The Longevity Diet: https://www.amazon.com/Longevity-Diet-Discover-Activation-Re...

Apparently when fasting (or fasting mimicing) our bodies start burning fat cells, removing old unused white blood cells, generating stem cells, and a lot more. In a study with monkeys, the group that was fed 25% fewer calories ended up living a lot longer and having fewer diseases. Longo advocates doing a fast-like diet for a week twice a year in healthy people and potentially more for people with certain health issues.