There's nothing but muslims' so called studies on health benefits of islamic fasting. Islamic fasting may be anything but healthy. It goes like this: wake up in the middle of the night. Eat yourself full and maybe more. Sleep. Wake up. Don't eat or drink anything until the sun goes down. Eat yourself full and maybe more. Sleep until the next cycle begins. Putting on more unhealthy weight during and after ramadan is not rare.

Drinking water is forbidden until the sun comes down and the fasting is over for the day, and in summer, excessive dehydration is fatal.

Also http://wikiislam.net/wiki/Adverse_Effects_of_Islamic_Fasting