The following BBC program by Michael Mosley explores how fasting can be beneficial and leads to immediate physical results and long term health benefits. He tries a 3-day fasting program to lower his IGF-1. A lower IGF-1 is supposedly better in the long run as it helps the body recover.
Another interesting research was that fasting helps create new brain cells. Does this make evolutionary sense? The Ramadan might have some surprising health benefits after all.