Here are some sources that may shed some light about I.F
https://nutritionfacts.org/video/alternate-day-intermittent-fasting-put-to-the-test/
https://nutritionfacts.org/video/is-alternate-day-intermittent-fasting-safe/
https://nutritionfacts.org/video/does-intermittent-fasting-increase-human-life-expectancy/
You can verify the citations of the videos below them.