Originally Posted by Mike ODonnell
Most of the research is actually ADF (alternate day fasting) which is about 36 hours. Some are 24 hours (more ADCR - alternate day calorie restriction). I would like to see more research on the compounding effects of more 18hr fasting daily.....but that probably wont happen anytime soon.
Oops, I was referring to ADF, but I forgot to take into account the time spend eating (animals are typically offered food for the entire 24 hours on alternate days). Unfortunately, researchers never report the actual feeding patterns of their subjects, so the actual fast (time from the last meal of one day to the first meal of the next feed day) might be as short as 24 hours. However, there is some evidence suggesting that animals may change their feeding habits to consume their daily intake in a relatively short time interval (~2 hours, more of a gorging pattern), so the fasts might be as long as 46 hours.
Yeah, and I agree that research on <24 hour fasting would be really interesting.