There's many articles on the University of Southern California site https://news.usc.edu/?s=fasting https://news.usc.edu/?s=fasting most have been posted here o

There's many articles on the University of Southern California site https://news.usc.edu/?s=fasting https://news.usc.edu/?s=fasting most have been posted here over time. Like the fasting mimicking diets they came up with https://news.usc.edu/82959/diet-that-mimics-fasting-appears-to-slow-aging/ https://news.usc.edu/82959/diet-that-mimics-fasting-appears-... That later turned into a startup https://prolonfmd.com/ https://prolonfmd.com/ of 5 day fasting at different monthly intervals depending on your weight, but you can read the orig paper to see what the calorie restrictions were and just make/measure your own food.