A study led by Hebrew University of Jerusalem’s  Dr. Ido Goldstein has discovered that repeated fasting (e.g. on alternate days) triggers a cellular memory mechanism in the liver, improving its response to future fasting events, offering new insights into metabolic regulation.

https://www.israel21c.org/scientists-decode-health-benefits-behind-intermittent-fasting/

https://academic.oup.com/nar/advance-article/doi/10.1093/nar/gkae1161/7915244?login=false