I've read in multiple places on the web that fasting for a few days a month can have all sorts of beneficial effects such as enhanced life span and lower heart attack rate. Here: http://hubpages.com/hub/Is-Fasting-Healthy-For-You [Broken] and here: http://www.naturalnews.com/023683_fasting_disease_heart_disease.html for example. Is this true? Can anyone point me to research on the subject? I'm not actually thinking of fasting, I just want to get my facts straight. Thanks.